Oracle Asm Drop Disk From Dismounted Diskgroup

Short clip on how to replace failed ASM DISK in ASM DISKGROUP. SQL> alter diskgroup ocr dismount; Diskgroup…. An external redundancy disk group would be simply dismounted, so we will focus on the normal and high redundancy disk groups. SET LINESIZE 145. All data files will be migrated to the newly created disk group, DATA SQL> alter system set db_create_file_dest='+DATA'; System altered. And as I mentioned this is the disk-group was storing OCR and Voting Disk. You should store the voting disks on shared accessible storage like Oracle Automatic Storage Management (ASM) or a certified cluster file system. bug:13476583 - dropping of a disk can cause dismount of diskgroup in other asm instances BUG:14257790 - ERROR: TOO MANY OFFLINE DISKS IN PST WHEN DROPPING A DISK Document Details. 1 is the default setting for the COMPATIBLE. Simple one this, but easily forgotten. Normally Disk groups are mounted at ASM instance startup and dismounted at shutdown. While creating a new Oracle database with ASM on an AWS EC2 platform I encountered the below errors while attempting to mount one of the ASM disk groups: ALTER DISKGROUP VOTE_DISK mount * ERROR at line 1: ORA-15032: not all alterations performed ORA-15017: diskgroup "VOTE_DISK" cannot be mounted ORA-15040: diskgroup is incomplete. SQL> ALTER DISKGROUP data MOUNT;. As ASM cannot access the disk, it is not able to mark its disk header as FORMER. NOTE: cache dismounted group 2/0x71E528D3 (FLASH_DB67043) SQL> alter diskgroup FLASH_DB67043 dismount force /* ASM SERVER:1910843603 */ ERROR: Could not read PST for grp 2. Como podemos ver en la primera línea de la consulta, este diskgroup contiene el ASMPARAMETERFILE, por lo tanto no podemos borrar el diskgroup hasta que no hayamos movido el ASMPARAMETERFILE a otro diskgroup o a una ubicación física fuera del ASM. Oracle 12c R1 ASM DiskGroup Rebalance This video was recorded in February 2015. After you drop the disks you cannot revert. If the disk(s) do not come back within this interval, ASM will initiate a forced drop of the disk(s), which will trigger a rebalance, in order to restore redundancy using the surviving disks. type: 0 ; 0x002: KFBTYP_INVALID and that is expected. First, let’s have a quick look at the procedure : from Oracle 11g, we have to use the renamedg command to rename a dismounted diskgroup, then the rough procedure is :. By default, ASM drops a disk shortly after it is taken offline; however, you can set the DISK_REPAIR_TIME attribute to prevent this operation by specifying a time interval to repair the disk and bring it back online. 2$ ls -ltr. The operation can be done online in oracle 11G R1 onwards; we plan to do this offline as the environment is 10204. SQL> alter system set db_create_file_dest='+DGRP2' scope=spfile; System altered. dbf' scope=spfile; System altered. ASM provides the performance of raw I/O with the easy management of a file system. When the ASM instance is opened gracefully, it first discovers the disks and then mounts all the existing disk groups on the local instance. Manually Adding a Disk from Existing Disk Group and To check the Disk are Adding or Not:. CREATE DISKGROUP PRUEBA EXTERNAL REDUNDANCY DISK '/dev/rdsk/c1t3d0s0'; 5. What options do we have for monitoring disk usage inside ASM? oracle oracle-asm oracle-database-appliance. Mount diskgroup ALTER DISKGROUP MOUNT/DISMOUNT 8. DISK_REPAIR_TIME. Need to change redundancy can arise if: - DBA's want to switch from Normal/High Redundancy to External Redundancy due to disk space constraints or due to plans of using External methods of maintaining redundancy (like RAID. In that case the ASM has to copy the data from its partner disks. 8) dismount 也不成,根据错误信息尝试 drop disk. 1 – Cached - Disk is present in the storage system, and is part of a disk group being accessed by the Automatic Storage Management instance. md_restore - to restore metadata. Files are allocated from disk groups. ASM에서 disk 추가 1. This SQL also initiates a ASM rebalance of the blocks from the old disk to the new disk. Step 1: Drop Diskgroup SUCCESS: drop diskgroup RECO_FHDB including contents Tue Jul 17 22:55:09 2012 NOTE: diskgroup resource ora. 4 and later Oracle Database Cloud Schema Service - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later. Database version is 12. ASM(AUTOMATIC STORAGE MANAGER) Step by Step Migrating a ORACLE DATABASE FROM NON-ASM TO ASM [[email protected] Desktop]$ ps -ef |grep pmo. When you request to remove a disk, Oracle ASM first rebalances the disk group by evenly relocating all file extents from the disk being removed to the other disks in the disk group. SQL> drop diskgroup ocr; drop diskgroup ocr * ERROR at line 1: ORA-15039: diskgroup not dropped ORA-15073: diskgroup OCR is mounted by another ASM instance On racnode2 ASM instance. ORA-15078: ASM diskgroup was forcibly dismounted Tue Sep 04 13:49:42 2012 System state dump requested by (instance=1, osid=18717 (CKPT)), summary=[abnormal instance termination]. This entry was posted in ASM and tagged ascmd, asm, delete, diskgroup, drop. Dismount Disk Group. Make sure permission and ownership of /var/opt/oracle directory is oracle:dba i. Ensure that Oracle ASM disks in a disk group have the same capacity to maintain balance as Oracle ASM data distribution policy is capacity-based. This chapter describes how to administer Oracle Automatic Storage Management (Oracle ASM) disk groups. NOTE: I have two disk group here i am using "DGRP2" disk group. all of the disk group data remains accessible. nodes of RAC is DISMOUNTED. This includes datafiles, logfiles, and OCR disks. Here I am going to drop TEST diskgroup from both node. AU_SIZE: Specifies the size of the allocation unit for the disk group. Hello, Recently I came across such situations that I was unable to drop the ASM diskgroup. alter diskgroup drop disk command also allows specifying a speed of the operation - alter diskgroup drop disk rebalance power. Drop ASM disk; Clone the disk, because ASM disk file is “Format variant: fixed default”. 1) Rac database , residing on AIX 6. In 11g, the default setting is 10. , crsctl stop cluster -all, crsctl stop has, drop. CONFLICT - Automatic Storage Management disk was not mounted due to a conflict; FOREIGN - Disk contains data. 5) Dismount the OLD Diskgroup in all Cluster Nodes that is not used by CRS : Login as SYSASM using SQLPLUS into ASM instance on One Node and run below Commands: alter diskgroup data dismount; Sample Command Output: SQL> SQL> alter diskgroup data dismount; Diskgroup altered. Above steps are for vote disk, OCR and ASM spfile located in separate disk group (e. The data files you create under ASM are not like the normal database files, when you create a file you only need to specify the disk group that the files needs to be created in, Oracle will then create a stripped file across all the disks within the disk and carry out any redundancy required, ASM files are OMF files. Administration - ASM To Start GUI to manage ASM instance $ asmca Mount/dismount disk groups. alter diskgroup add disk rebalance power 0, alter diskgroup add disk orcl, alter diskgroup add disk 12c, add disk to asm diskgroup using asmcmd, how to find disks in asm diskgroup, how to add disk in asm diskgroup oracle 12c using asmca, add disk to asm diskgroup windows, candidate disk in asm,drop disk from diskgroup asm 12c, drop asm diskgroup, alter diskgroup drop disk command, oracle asm. Para borrar un disco de un grupo de ASM:-bash-3. • Created ASM disk group with OMF to store database files. SQL> ASM Alert Log File SQL> CREATE DISKGROUP DG1 NORMAL REDUNDANCY FAILGROUP failure_group_1 DISK 'ORCL:ASMD6' FAILGROUP failure_group_2 DISK 'ORCL:ASMD7' Sat Mar 17 21:46:42 2007. One of the big selling points of ASM is the ability to reconfigure the storage online. About Oracle ASM Disk Groups. FREE_MB is only 18 MB and if I drop (in order to simulate a disk failure) a disk now, ASM would not be able to restore redundancy even after a disk failure/drop as you can see in the following. ASM disk group attribute is set to 11. The operation can be done online in oracle 11G R1 onwards; we plan to do this offline as the environment is 10204. SQL> drop diskgroup data including contents; drop diskgroup data including contents * ERROR at line 1: ASM diskgroups dismounted. "DG01" diskgroup cannot be mounted due to one disk member is missing: SQL> ALTER DISKGROUP DG01 MOUNT /* asm agent *//* {1:16801:2} */ NOTE: cache registered group DG01 number=1 incarn=0x2929b317. To change the redundancy level, you must create another disk group with. ASM diskgroup creation on windows with dummy disks Today I needed to setup a small test Oracle database on Windows with Oracle ASM storage. Automatic Storage Management provides easy file management. 10) to confirm the disk group creation. NOTE: cache dismounted group 2/0x71E528D3 (FLASH_DB67043) SQL> alter diskgroup FLASH_DB67043 dismount force /* ASM SERVER:1910843603 */ ERROR: Could not read PST for grp 2. If the disk(s) do not come back within this interval, ASM will initiate a forced drop of the disk(s), which will trigger a rebalance, in order to restore redundancy using the surviving disks. High Redundancy:3-way mirroring for all files and the maximum oracle asm file sizes for disk group is 3. SQL> alter diskgroup flash dismount; Diskgroup altered. ORA-15040: diskgroup is incomplete ORA-15042: ASM disk "1" is missing +ASM1 > drop diskgroup PWRPPRD_REDO; drop diskgroup PWRPPRD_REDO * ERROR at line 1: ORA-15039: diskgroup not dropped ORA-15001: diskgroup "PWRPPRD_REDO" does not exist or is not mounted Since the diskgroup PWRPPRD_REDO is not used, we can recreate with the "force" option (and. It is quite easy to accomplish with Oracle ASM Configuration Assistant (ASMCA). Oracle Database Reference 11g Release 2 (11. Generic approach – per LUN copying (like EMC SanCopy) – is not entire possible for RAC when all is kept in ASM disk groups without creating at least one new disk group. ASM drops those disks after the DISK_REPAIR_TIME expires. How to add disk to ASM (DATABASE) runing in production server We have database running on ASM, after two years we faced the problem of space deficiency. Montar un Disk Group ALTER DISKGROUP DATA MOUNT; 7. Each disk group contains the metadata that is required for the management of space in the disk group. name DiskGroup, b. org [mailto:oracle-l-bounce_at_freelists. INSTRUCTIONS 1. In 11g, the default setting is 10. View 5 Replies View Related Separate ASM Diskgroup For Online Redo Logs Sep 25, 2013. If your disk group is normal redundancy AND if another disk fails AND it's the partner of that disk that has already failed, your disk group will be dismounted, all your databases that use that disk group will crash and you may lose data. ALTER DISKGROUP - Oracle. SQL> alter diskgroup DBADATA rename disks all; NOTE : after renaming the disk group, original disk group resource in not automatically deleted. All other password file manipulation is performed with ASMCMD or SRVCTL commands. CREATE DISKGROUP DATA01 EXTERNAL REDUNDANCY DISK '/dev/asm/asmdisk*'; Resources: How To Drop and Recreate ASM Diskgroup (Doc ID 563048. External Redundancy: If you do not want mirroring by Oracle ASM, but for RAID disk and the maximum oracle asm file sizes for disk group is 16 TB. SQL> alter diskgroup ASM_DISK1 dismount force;. SQL> startup. It simplifies database administration by eliminating the need for you to directly manage potentially thousands of Oracle database files. Sometimes Oracle Database 11gR2 complains about not being able to extend a (lob) segment with ORA-1691, but ASM monitoring based on USABLE_FILE_MB did not fire. 2 or higher the limit is now 1024. In this article I am illustrating how to rename ASM Disk group in oracle 12c. After you drop the disks you cannot revert. SQL> drop diskgroup DATA FORCE INCLUDING CONTENTS; Diskgroup dropped. This page consists of all the well-developed articles of the Technologies. Oracle ASM Unable to remove ASM Diskgroup from the ASM Instance. As mentioned in the previous article, the ASM instance is different from the Oracle Database instances. asm for dba. This command will remove the disk group name from the asm_diskgroups parameter when the server parameter file is used. When you request to remove a disk, Oracle ASM first rebalances the disk group by evenly relocating all file extents from the disk being removed to the other disks in the disk group. Before you use the command, ensure that ASM diskgroup is dismounted. First, let’s have a quick look at the procedure : from Oracle 11g, we have to use the renamedg command to rename a dismounted diskgroup, then the rough procedure is :. SQL> shut immediate [[email protected] bin]$. Clear the header from the disk that was used in the ASM disk group. ASM 관리와 모니터링. Former:DISK was present in other diskgroup,was dropped cleanly 5. NOTE: I have two disk group here i am using "DGRP2" disk group. These are known as wait events, because each of these operations requires the system to wait for the event to complete. Checking Metadata. If your disk group is normal redundancy AND if another disk fails AND it's the partner of that disk that has already failed, your disk group will be dismounted, all your databases that use that disk group will crash and you may lose data. Login to the ASM instance prodrac1:/u01>> ps -ef|grep pmon oracle 98424 1 0 Nov 10 – 58:56 ora_pmon_prod11 oracle 131176 1 0 Nov 10 – 21:23 asm_pmon_+ASM1 oracle 516392 525076 0 1…. ASM in Oracle databases alter diskgroup drop disk ASM diskgroups dismounted ASM instance shutdown. When ASM realised this is immediatly issued a ALTER DISKGROUP FLASH_D DISMOUNT FORCE command. Move RAC database from one diskgroup to another in ASM (Manually) Posted on August 17, 2016 by Bruno Carvalho This approach is quite annoying because it has a lot of steps and things to consider, yet here goes a summary of how it could be done in a 3 node RAC as example:. Check the existing voting disk details. Friends In This Video We Learn How To Add/Drop ASM Disk In Disk Groups And Monitor Re-Balance Operations In Oracle On Windows. SQL> alter diskgroup test dismount; Diskgroup altered. Create a DATA2 diskgroup. OCR, Voting Disk file, ASM spfile and MGMTDB were installed onto +DATA group when Grid Infrastructure 12c was installed. SQL> alter diskgroup test_failgroup replace disk TEST_FAILGROUP_0002 with '/dev/sdg1'; alter diskgroup test_failgroup replace disk TEST_FAILGROUP_0002 with '/dev/sdg1' * ERROR at line 1: ORA-15032: not all alterations performed ORA-15221: ASM operation requires compatible. Allocation unit number 1 on every ASM disk is reserved for the PST, but only some disks will have the PST data. ORA-15260: permission denied on ASM disk groupSQL> alter diskgroup DG1 rebalance power 11;alter diskgroup DG1 rebalance power 11*ERROR at line 1:ORA-15032: not all alterations performedORA-15260: permission denied on ASM disk groupSolution:SQL> exitDisconnected from Oracle Database 11g Enterprise Edition Release 11. KADDACHI Hafedh's Oracle Blog 1. Below are the steps which I followed to move the database to ASM and then created a spfile in ASM diskgroup in the end. Perform the procedure of adding the disk to a disk group as I had discussed previously. Move RAC database from one diskgroup to another in ASM (Manually) Posted on August 17, 2016 by Bruno Carvalho This approach is quite annoying because it has a lot of steps and things to consider, yet here goes a summary of how it could be done in a 3 node RAC as example:. Drop etmeye çalıştığınız disk group içerisindeki bir file oracle tarafından kullanıyor ise o diskgroup’ u size drop ettirmeyecektir. Now that the ASM Disk Groups and constituent Disks have been dropped/erased, the new ASM Disk Groups can be recreated. log during Rman Backup Thanks, Anil. Otherwise, ASM takes the disk offline. No add or drop any griddisk. NAME TYPE VALUE. 00 col USABLE_CALC_GB format 999,999. total_mb, b. Remove Existing diskgroup(s) that need redundancy changed, in a RAC environment make sure disk groups are dismounted from other ASM instances or other ASM instances are shutdown. The ASM functionality is an extention of the Oracle Managed Files (OMF) functionality that also includes striping and mirroring to provide balanced and secure storage. The ASM_DISKSTRING parameter is not set, I'm not quite certain what to set it to. When using a server parameter file (SPFILE), Oracle ASM automatically adds a disk group to this parameter when the disk group is successfully created or mounted. Create ASM Instance(Manually) on Windows Automatic Storage Management (ASM) is an integrated file system and volume manager expressly built for Oracle database files. You can use ASM alias files both when creating new ASM files and when referring to existing files. Please find the following 11gR2 doc regarding automatic update asm_diskgroup parameter. And there was no space to create the new one to switch to image copy. Back in April I was at COLLABORATE 08 and delivered a presentation on 11g -- Oracle 11g New Features Out of the Box, including Oracle 11g ASM features. if NULL –instances are candidates for creating disk groups. ASM diskgroups mounted. As explained in perevious post, ASM is used to setup the disks once we choose a shared storage medium. DISMOUNTED - Disk group was cleanly dismounted by the Automatic Storage Management instance following a successful mount. ALTER DISKGROUP DATA ADD DISK '/dev/mapper/asm10', '/dev/mapper/asm11', '/dev/mapper/asm12', '/dev/mapper/asm13', '/dev/mapper/asm14', '/dev/mapper/asm15',. Below exercise is to move everything from old OCR/VOTING diskgroup OCR_VOTE to new diskgroup OCR_VOTE2. md_restore - to restore metadata. asm 11g for dba - Free download as PDF File (. To delete a disk from the disk group. Dismount and mount the disk group Drop the disk group. SQL> # drop diskgroup RMAN_BKP FORCE INCLUDING CONTENTS; Don't perform this in production. Altering ASM Disk Groups Friday, July 06, 2018 < drop diskgroup data including contents; drop diskgroup data including contents * ERROR at line 1: ORA-15039. Drop/remove a disk. ASM drops those disks after the DISK_REPAIR_TIME expires. SQL> ALTER DISKGROUP data MOUNT; SQL> ALTER DISKGROUP data DISMOUNT; SQL> ALTER DISKGROUP ALL MOUNT; SQL> ALTER DISKGROUP ALL DISMOUNT; 3. Use below command to clear the header of the disk. ORA 15075: disk(s) are not visible cluster-wide I looked back and found that the scandisks was not done on all the nodes of cluster. When a disk group is mounted, a disk group number is chosen. Using MOUNT and DISMOUNT options you can make one or more Disk Groups available or unavailable. 1 版本开始增加了diskgroup重命名的新功能,通过renamedg命令重命名已经创建的diskgroup,重命名前需要先dismount diskgroup。. Trying to dismount the Diskgroup DATA in-order to change the redundancy, but in the attempt of dismounting the diskgroup I faced below issues. After the disk drop operation, ASM performs a re-balance to restore full redundancy for the data on the failed disks. dbf' scope=spfile; System altered. Hello , Here is the below step to copy the asm spfile from non asm filesystem to asm filesystem. Applies to: Oracle Database - Enterprise Edition - Version 10. Oracle ASM Cluster File Systems (ACFS) in Oracle Database 11g Release 2. Otherwise, ASM takes the disk offline. Automatic Storage Management (ASM) automatically adds a disk group to this parameter when the disk group is successfully created or mounted, and automatically removes a disk group from this parameter. My virtual box was self-contained with only 3 shared disk and all these were created as part of Normal redundancy of +DATA disk-group. I was under the impression this behaviour of ASM deserved some explanation. DATAFILE_ORAPROD7. ASM:Automatic Storage Management, 是Oracle 主推的一种面向O数据库 Oracle ASM 详解 原创 Dave 最后发布于2010-02-21 14:13:00 阅读数 52794 收藏. Make sure that before you proceed with dropping the old disks, the rebalance of the additional disk had completed its tasks. ASM_DISKSTRING specifies an operating system-dependent value used by Automatic Storage Management to limit the set of disks considered for discovery. 所以Oracle 建议我们不要创建太多的diskgroup,2组就够了,一组DATA,一组FRA. 00 col USABLE_CALC_GB format 999,999. Create Diskgroup create diskgroup dg1 external redundancy disk '/dev/dsk/c2t0d0s2'; 9. Renaming ASM Disk group in Oracle 11gR2: The renamedg utility is new in Oracle 11gR2 and it's documented in the storage administrator’s guide. alter diskgroup all mount / alter diskgroup data1 mount / alter diskgroup all dismount / Views Containing Oracle ASM Disk Group Information Tuning Oracle disk I/O: ASM configuration;. Urgent Help needed with ASM Header Corruption - Q: When is an ASM disk header is read and updated ? Posted by PDSERVICE on Feb 05, 2016 In If you cannot recover the data by yourself, ask Parnassusdata, the professional ORACLE database recovery team for help. Absenteeism of failure groups were preventing diskgroup mount with missing disk. SQL> alter diskgroup test_failgroup replace disk TEST_FAILGROUP_0002 with '/dev/sdg1'; alter diskgroup test_failgroup replace disk TEST_FAILGROUP_0002 with '/dev/sdg1' * ERROR at line 1: ORA-15032: not all alterations performed ORA-15221: ASM operation requires compatible. Possible values range from 1 to 11 with 11 being the fastest. Renaming a diskgroup is a two step operation: First it is necessary to create a configuration file:. CONFLICT - Automatic Storage Management disk was not mounted due to a conflict; FOREIGN - Disk contains data. Information about How To Configure ASM Diskgroup with SQL Commands This document will explain how to Configure ASM Diskgroups through sql. How to drop a disk from a diskgroup in Oracle ASM. This chapter describes how to administer Oracle Automatic Storage Management (Oracle ASM) disk groups. Resize disk size ALTER DISKGROUP dgroup1 RESIZE DISKS IN FAILGROUP failgrp1 SIZE 100G;. ASM Views; Drop a file from diskgroup; Manage ASM Directories; Mounting and Dismounting a Diskgroup; Checking a Diskgroup; Rebalance a Diskgroup; Resize a Disk; Undrop Disk from Diskgroup 2009 (120) December (6) November (9) October (3) September (8) August (13) July (29). Fixed Size 2260728 bytes. Execute the following command to replace the existing bloated disk in the disk group with a new disk. ASM disk with the header status of Former indicates that those disk were already part of the diskgroup and now it can be added into existing diskgroup or New diskgroup. The ASMCMD remap command was introduced to address situations where a range of bad sectors exists on a disk and must be corrected before ASM or database I/O. Money Baller Recommended. 1 64 bit database on Windows 2008 server. com DROP DISK The DROP DISK clause lets you drop one or more disks from the disk group and automatically rebalance the disk group. ORA-15084: ASM disk “string” is offline and cannot be dropped. Click on Create to create new Disk Group. 8) dismount 也不成,根据错误信息尝试 drop disk. Action: Check the alert log for more information on the reason for the failure. Disklerin oracle userina verilmesi gerekmektedir. We added 10 disk and as the rebalance was occurring this diskgroup dismounted because the check that ASM does during the rebalance operation found corruption on block 40. Step 3: Re-create your ASM disk group(s) Set your ORACLE_SID to your ASM instance and create a new diskgroup. This information includes how to create, alter, drop, mount, and dismount Oracle ASM disk groups. (Current Disk Group Used % of Safely Usable value: 100) OEM alert for Automatic Storage Management +ASM5_ssssss5: Disk group RECO has used 100% of safely usable free space. by Lutz Hartmann, Oracle ACE. SQL> alter diskgroup DATA DISMOUNT FORCE; Diskgroup altered. 7) If the previous steps had success and the TEST diskgroup can be successfully mounted (on each ASM instance), then drop the TEST_DISK diskgroup as follow: alter diskgroup test_disk dismount; –(from all the ASM instances, except from one). 2 or higher, then the range of ASM_POWER_LIMIT parameter is 0 to 1024. Now I was suspecting that this issue could be due to some residue remaining in some disks after server re-imaging. Now that the ASM Disk Groups and constituent Disks have been dropped/erased, the new ASM Disk Groups can be recreated. Dismount Disk Group. But if a disk has failed and ASM has initiated rebalance, there may be a legitimate reason for concern. 1 to recreate the diskgroup. Variable Size 1108320520 bytes. Manually apply the archive log by moving archive from prodution ASM disk to DR AMS disk. As ASM cannot access the disk, it is not able to mark its disk header as FORMER. "renamedg" utility can be used to rename of the diskgroup when the diskgroup is dismounted. # /usr/sbin/oracleasm configure Configuring the Oracle ASM library driver. Oracle 10g managing asm disk and diskgroup. Enter the disk group name to be created. SQL> alter system set control_files='+DGRP2' scope=spfile; System altered. Specify "one and two" arguments in the PHASE…. SQL> alter diskgroup DBADATA rename disks all; NOTE : after renaming the disk group, original disk group resource in not automatically deleted. This time I will create a new diskgroup in ASM. Whenever there is a disk added/removed/resized, ASM starts to rebalce the data on the disks in the disk group. managing volumes 8. 22:40:58 [email protected]> alter database drop logfile group 1; Database altered. Set standby file management to manual show parameter standby. ) Make sure you have pfile in grid home bash-3. Renaming ASM Disk group in Oracle 11gR2: The renamedg utility is new in Oracle 11gR2 and it's documented in the storage administrator’s guide. This article was helpful. alter diskgroup drop disk command also allows specifying a speed of the operation - alter diskgroup drop disk rebalance power. Oracle Knowledge Sharing Blog - Veera (Oracle Certified Professional) ASM diskgroups dismounted. Manual Rebalance during ASM disk drop operation (Doc ID 1912225. A few days ago , I was checking a 11gr2 (11. As the name implies, we store our data in Disk Groups where one or more disks come together instead of a single disk. SQL> ALTER DISKGROUP data MOUNT;. pdf), Text File (. Remove Existing diskgroup (s) that need redundancy changed, in a RAC environment make sure disk groups are dismounted from other ASM instances or other ASM instances are shutdown. asm disk 의 상태 풀이 설명. 8) dismount 也不成,根据错误信息尝试 drop disk. Disk Group Management Disk Group Metadata Viewing Connected Clients Extending an Existing Disk Group Dropping Disks from an Existing Disk Group Administering ASM Disk Groups Part 1 & Part 2 Adding and Dropping in the same command Undropping Disks in Disk Groups Replacing Disks in Disk Group Renaming Disk Groups Resizing Disks in Disk Groups. When the Oracle ASM is used, the concept of Disk group enters our lives. A existência do Oracle ASM Extents permite o mecanismo de Stripe e Mirror. The first time I was asked to rename a diskgroup, I thought that it would be a trivial operation, but what should be an easy operation is not really that easy. mount : Mounts a disk group. ORACLE - ASM CHECK ALL DISK GROUP; ASM - Rebalance Issue 10g; ORACLE - Expdp estimate_only with compression; ORACLE - RMAN Create Manual standby database; ORACLE - RMAN Re-create control file; ORACLE - orapw (password file) ORACLE - ORA-01111 for Standby db; ORACLE - Data Guard - SWITCHOVER_STATUS; ORACLE - Data Guard End-of-Redo; ORACLE - Data. When Oracle ASM disk groups are created with some redundancy – External, Normal or High – then its redundancy cannot be changed. org] On Behalf Of Chen, Sarah Sent: Friday, June 24, 2005 1:19 PM To: 'oracle-l_at_freelists. When a disk group is mounted, a disk group number is chosen. All data files will be migrated to the newly created disk group, DATA SQL> alter system set db_create_file_dest='+DATA'; System altered. Show ASM disk group IO; Show ASM diskgroup parameter; Show ASM disk groups; Show ASM diskgroup and instance info; Show ASM failure groups; Show ASM files; Show status of ASM rebalancing; Set ASM preferred failure group; Set all ASM disks online; Resize ASM disk group; Database. Subject: Re: ASM - removing disk from diskgroup question That is correct, just make sure it goes to former before you add it back in to another diskgroup. SQL> shut immediate [[email protected] bin]$. It then drops the disk group and all its member disks and clears the disk header. To drop dskgrp01 with its contents, use the following. In the ASM instance: ===== alter diskgroup RAWDG01 add disk ‘/dev/did/rdsk. Adding new disk groups in ASM. 1) Last updated on JANUARY 01, 2020. We need to reject offlining of new failgroup to keep diskgroup mounted. This is how we tested the rename dg command available in11gR2. Since our database in running on archivelog mode, lets change the db_recovery_file_dest location to ASM diskgroup DATA. Follows a sample script to be used to generate OS commands for this:. When you request to remove a disk, Oracle ASM first rebalances the disk group by evenly relocating all file extents from the disk being removed to the other disks in the disk group. Once the diskname is changed, dismount and mount the diskgroups. ASM set to. /rman target / RMAN> startup. ASM_DISKGROUPS:-Name of the disk groups created. A existência do Oracle ASM Extents permite o mecanismo de Stripe e Mirror. The first ASM slide was about diskgroup compatibility, and I have a bit more to share than I said back then. This number may change across disk group mounts. ALTER DISKGROUP - Oracle. Renaming Disk Groups in 11gR2. Whenever there is a disk added/removed/resized, ASM starts to rebalce the data on the disks in the disk group. Case 2: Migrating disk group from one to another with different diskgroup name. (Current Disk Group Used % of Safely Usable value: 100) OEM alert for Automatic Storage Management +ASM5_ssssss5: Disk group RECO has used 100% of safely usable free space. Automatic Storage Management (ASM) automatically adds a disk group to this parameter when the disk group is successfully created or mounted, and automatically removes a disk group from this parameter. Procedure to create new ASM Diskgroup. Forcing disk group dismount ASM does not allow a disk group to be dismounted if it's still being accessed. In 11g, the default setting is 10. This is the my step by step instruction how to rename ASM diskgroup with RAC database running on it. ASM has some header information that will have to be removed using a dd command 2. Taking the storage server offline when one or more grid disks are in this state will cause Oracle ASM to dismount the affected disk group, causing the databases to shut down abruptly. Adding new disk groups in ASM. Revoke/Create and add new ASM disks. To delete a disk from the disk group. This is basically achievable because ASM distributes data across all disks in a disk group evenly, and assuming you have enough space, you can happily drop disks in a disk group and ASM will seamlessly migrate the data to the existing disks in the disk group. Before rename the disks in disk group, you need to mount the disk group in restricted mode. SQL> ALTER DISKGROUP data MOUNT;. But if a disk has failed and ASM has initiated rebalance, there may be a legitimate reason for concern. Oracle Database 10g Release 1, introduced Automatic Storage Management(ASM), a new framework for managing Oracle database files,to bypass the OS overhead,to simplify Oracle data management,to enforce the SAME (Stripe And Mirror Everywhere, RAID10), andto provide a platform for file sharing in RAC and Grid computing. 2$ ls -ltr. Dismount and mount the disk group Drop the disk group. ASM instance was restarted on Node-1 alone. Forcing disk group drop To drop a disk group I have to mount it first. At this moment we had not created database. In 11g, the default setting is 10. RDBMS attribute when using the SQL CREATE DISKGROUP statement, the ASMCMD mkdg command, ASMCA Create Disk Group page, and Oracle Enterprise Manager Create Disk Group page. "Chen, Sarah" wrote: Hi, Anyone have an idea how to drop a dismount ASM disk group?. Steps to Move ASM DATABASE FILES from ONE DISKGROUP TO ANOTHER. SQL> alter diskgroup DATA drop disk DATA_0002, DATA_0003; Diskgroup altered. 2), if the COMPATIBLE. I had seen asm in the past but never had hands on experience with it. ALTER DISKGROUP ALL DISMOUNT; ALTER DISKGROUP ALL MOUNT; ALTER DISKGROUP DISMOUNT; ALTER DISKGROUP MOUNT; 磁盘成员管理 为diskgroup增加disk. The entire disk group is automatically dismounted, which means loss of data accessibility. This is an effort of many dedicated professionals for a better IT world. Essa demonstração foi realizada na versão 12C, mas esta funcionalidade existe a partir da versão 11g. About Oracle ASM Disk Groups. 2018-03-16 09:08:32. disk group's name. Follow A day in the life of a dba on WordPress. Disk group components include disks, files, and allocation units. invoke asmca $ asmca. About Oracle ASM Disk Groups. Veeratteshwaran 0. Conforme a documentação oficial da Oracle, as definições para disco ASM e diskgroup ASM são: 1- Oracle ASM Disks (discos ASM. This parameter does not stop the databases that depend on the disk group you are stopping, but instead performs a forceful dismount that may cause those databases to fail. g +FRA) that has finished. The power with which it does the rebalancing is the rebalancing power. 1 and 1126996. SQL> select…. Posts about ASM FRA written by Emerging Hadoopers. 4 two node cluster. Where multiple disk groups are used for datafiles, the reference move-to-asm. DROPPING OF DISK GROUP IN RAC DROPPING A DISKGROUP FROM +ASM IN ORACLE 11g RAC. Create external redundancy disk groups when using high-end storage arrays. Identify the disks that have a large amount of free space that can be reclaimed, and the disk group they are part of. QUIESCING - CRSCTL utility attempted to dismount a disk group that contains the Oracle Cluster Registry (OCR). A first for me. org' Subject: ASM disk group Hi, Anyone have an idea how to drop a dismount ASM disk group? I can't mount it and also can't drop it?. [[email protected] ~]$ sqlplus / as sysasm SQL> alter diskgroup DATA_TP rebalance with balance compact wait; Diskgroup altered. In 11g, the default setting is 10. Oracle 12c R1 ASM DiskGroup Add/Drop Disks - Duration: 1:06:43. Oracle ASM then releases the disk and you can then add the disk to another disk group or use it for other purposes. One example would be that you have created these components in the +DATA diskgroup and you wish to move the OCR, Vote File and ASM spfile to a NORMAL or HIGH redundant diskgroup. DISK_REPAIR_TIME. SQL> ALTER DISKGROUP DataDG drop disk DISK18, DISK17, DISK16, DISK15; Diskgroup altered. 3) Oracle ASM meta - The disks that belong to a disk group - The amount of space that is available in a disk group - The file names of the files in a disk group - The location of disk group data file extent s. 1 – Cached - Disk is present in the storage system, and is part of a disk group being accessed by the Automatic Storage Management instance. ORA-15078: ASM diskgroup was forcibly dismounted Tue Sep 04 13:49:42 2012 System state dump requested by (instance=1, osid=18717 (CKPT)), summary=[abnormal instance termination]. 1 and later. Votedisk : The voting disk is a file that manages information about node membership. When a disk group is mounted, a disk group number is chosen. ORA-15084: ASM disk “string” is offline and cannot be dropped. Automatic Storage Management provides easy file management. An individual disk can be referenced by its Oracle ASM disk name. oracle:[email protected] /oracle > srvctl remove diskgroup -g DATAFILE_ORAPRD7 oracle:[email protected] /oracle > crsctl stat res -t ----- NAME TARGET STATE SERVER STATE_DETAILS ----- Local Resources ----- ora. When Oracle ASM disk groups are created with some redundancy – External, Normal or High – then its redundancy cannot be changed. group_number GRP_NUM,a. 4 two node cluster. DROP DISKGROUP dgroup1 EXCLUDING CONTENTS;. Beginning with Oracle Database 11g Release 2 (11. RDBMS - The minimum COMPATIBLE database initialization parameter setting for any database instance that uses the disk group. alter diskgroup data01 drop disk DISK7; ORA-15032: not all alterations performed ORA-15054: disk "DISK7" does not exist in diskgroup "DATA01" I don't understand why was these errors occurring :(So I added disk by force: ALTER DISKGROUP DATA01 add DISk 'ORCL:DISK7' name DISK7 force; It was added and Oracle tried to make a. Oracle 12c R1 Create ASM Disk Groups This video was recorded in December 2014. Oracle Clusterware will store the votedisk on the disk within a disk group that holds the Voting Files. ALTER DISKGROUP data DROP DISK VOL15; ASM'deki Disk Kullanım Miktarı Nasıl Bulunur? Aşağıdaki sorguyu kullanabilmemiz için +ASM instance'ına girmemiz gerekir. Oracle By Example 4,340 views. "renamedg" utility can be used to rename of the diskgroup when the diskgroup is dismounted. mount : Mounts a disk group. The entire disk group is automatically dismounted, which means loss of data accessibility. Crete Disk Group: Create Disk groups using the CREATE DISKGROUP statement and specify the level of redundancy. But RMAN had to scan the whole database to find the changed blocks. Add all the CANDIDATE Luns to the Dummy disk group. About Oracle ASM Disk Groups. FRA diskgroup has two ASM disks, we just want to have one disk and also need increase the FRA diskgroup size, here are the steps. Note: This parameter can be used only with Oracle Clusterware. SQL> ALTER DISKGROUP data DROP DISK datab2; The UNDROP command used to undo only pending drop of disks. /rman target / RMAN> startup. This article presents the setup details. If the database uses a recovery area, then change the recovery area location to the Oracle ASM disk group. CREATE DISKGROUP DATA01 EXTERNAL REDUNDANCY DISK '/dev/asm/asmdisk*'; Resources: How To Drop and Recreate ASM Diskgroup (Doc ID 563048. Most Automatic Storage Management files do not need to be manually deleted because, as Oracle managed files, they are removed automatically when they are no longer needed. Force dismounting the disk group. 1) to 11g release 2 (11. Therefore a clusterwide shutdown and restart would be required. Difference between CANDIDATE & PROVISIONED in ASM DISK. 320313 SQL> alter diskgroup PROD_RECO1 drop disk ASM_PROD_133; Diskgroup altered. View 5 Replies View Related Separate ASM Diskgroup For Online Redo Logs Sep 25, 2013. 5 Existing RAC Setup: 2 nodes called "rac1" and "rac2", RAC database "babu" has 2 instances called "babu1" and "babu2" (currently shutdown). 3 RAC_DATA1 DISMOUNTED 4 RAC_DATA2 DISMOUNTED 3 RAC_DG1 MOUNTED 4 RAC_DG2 MOUNTED SQL> drop diskgroup RAC_DATA1; drop diskgroup RAC_DATA1 * ERROR at line 1: ORA-15039: diskgroup not dropped ORA-15001: diskgroup "RAC_DATA1" does not exist or is not mounted. About Oracle ASM Disk Groups. SQL> alter diskgroup dg-name mount restricted; New commands in ASMCMD. linux 종료 후 disk 추가 하고 linux 시작 2. Useful ASM Commands Table of Contents Useful ASM commands in a RAC environment Use kfed, kfod to dump ASM headers and display the current ASM status Use -g switch to check whether all diskgroups and disks are mounted clusterwide Dismount a diskgroup on a local instance Manually add an ASM instance after Oracle Restart. HIGH REDUNDANCY - Three-way mirroring, requiring three failure groups. Exclusion: No change in redundacy at any level. SQL> drop diskgroup data including contents; Diskgroup dropped. com A disk group consists of multiple disks and is the fundamental object that Oracle ASM manages. From: oracle-l-bounce_at_freelists. In the ASM instance: ===== alter diskgroup RAWDG01 add disk ‘/dev/did/rdsk. DISMOUNTED - Disk group was cleanly dismounted by the Automatic Storage Management instance following a successful mount. When running ASM redundancy, voting disks have a higher requirement for the number of disks. CREATE DISKGROUP DATA01 EXTERNAL REDUNDANCY DISK '/dev/asm/asmdisk*'; Resources: How To Drop and Recreate ASM Diskgroup (Doc ID 563048. Make sure the diskgroup is mounted in restricted mode. AU_SIZE: Specifies the size of the allocation unit for the disk group. SQL> drop diskgroup FRA including contents; Diskgroup dropped. By Veeratteshwaran October 13, 2014 September 12th, active use of diskgroup "DATAGRP1" precludes its dismount SQL> SQL> DROP DISKGROUP datagrp1 FORCE INCLUDING CONTENTS; MIGRATE DATA FROM OLD ASM DISK TO NEW ASM DISK. Other operations, such as CREATE DISKGROUP and ADD/DROP/RESIZE DISK, require the SYSASM privilege and are not allowed with the SYSOPER privilege. Administering Oracle ASM Disk Groups. In this post I've changed diskgroups name of two databases(2 ASM Instances). SQL> ALTER DISKGROUP disk_group_1 REBALANCE POWER 5; MOUNT and DISMOUNT DiskGroups: Normally Disk groups are mounted at ASM instance startup and dismounted at shutdown. How can I do this? Thanks for advice Marek Gregor. ASM manage database physical files in disk. from ASM diskgroup using sqlplus alter diskgroup drop disk command. The disk groups are dismounted at Oracle ASM instance shutdown. Fixed Size 2260728 bytes. backup and restore the metadata of diskgroups 6. This includes datafiles, logfiles, and OCR disks. Therefore a clusterwide shutdown and restart would be required. You should store the voting disks on shared accessible storage like Oracle Automatic Storage Management (ASM) or a certified cluster file system. ASM has some header information that will have to be removed using a dd command 2. Revoke/Create and add new ASM disks. SQL> alter diskgroup DATA DISMOUNT FORCE; Diskgroup altered. export ORACLE_SID=+ASM $ sqlplus "/ as sysdba" Bu şekilde ASM tablolarına erişim sağlarız. ASM instance was restarted on Node-1 alone. How to rename ASM diskgroup in Oracle 12c RAC Database? Solution: You can rename a disk group in one of two ways. by Lutz Hartmann, Oracle ACE. Short clip on how to replace failed ASM DISK in ASM DISKGROUP. Drop the disks from the other node. Forcing disk group drop To drop a disk group I have to mount it first. Note: Alternatively, we can execute add disk & drop disk statements in one operation, in that way only one rebalance operation will be started as follow: SQL> alter diskgroup add disk ‘’,. What would be the result of this command?. I had to recreate the whole diskgroup from scratch. Managed file creation and deletion —Oracle ASM further reduces administrative tasks by enabling files stored in Oracle ASM disk groups to be Oracle Managed Files. Remove all the added Luns from DUMMY disk group one by one (you may not be able to remove the last Lun) and rebalance for each Lun. Oracle ASM also automatically mounts a disk group when you initially create it, and dismounts a disk group if you drop it. - md_restore Command Restores disk groups from a backup. In the ASM instance: ===== alter diskgroup RAWDG01 add disk ‘/dev/did/rdsk. In 11g, the default setting is 10. WhenMOUNT FORCE succeeds, Oracle ASM takes the missing disks. alter diskgroup add disk rebalance power 0, alter diskgroup add disk orcl, alter diskgroup add disk 12c, add disk to asm diskgroup using asmcmd, how to find disks in asm diskgroup, how to add disk in asm diskgroup oracle 12c using asmca, add disk to asm diskgroup windows, candidate disk in asm,drop disk from diskgroup asm 12c, drop asm diskgroup, alter diskgroup drop disk command, oracle asm. Create ASM Instance(Manually) on Windows Automatic Storage Management (ASM) is an integrated file system and volume manager expressly built for Oracle database files. 0'; Diskgroup altered. From: oracle-l-bounce_at_freelists. New disk groups. In that case you need to create a pfile from the spfile and then startup the ASM instance using the pfile. Back in April I was at COLLABORATE 08 and delivered a presentation on 11g -- Oracle 11g New Features Out of the Box, including Oracle 11g ASM features. At this moment we had not created database. 1) Identify the datafile to be moved. He brought this disk 27 online after that. 4 Administering Oracle ASM Disk Groups. 2) ----ASM_DISKGROUPS specifies a list of names of disk groups to be mounted by an Automatic Storage Management instance at instance startup. ASM instance started. ORA-15410: Disks in disk group do not have equal size 12. The trick was to re-initialize the disks (clear ASM metadata) before re-creating it. Now I am sending more requests SIMULTANEOUSLY - I get to use the fact that I have 2 LUNs on separate controllers. An external redundancy disk group would be simply dismounted, so we will focus on the normal and high redundancy disk groups. 4 sous win 2003 server. You can use this tool to rename ASM diskgroups. COMPATIBLE. 0 for grp 1 SQL> ALTER DISKGROUP data OFFLINE DISK VOL1. … Continue reading →. ORA-15063: ASM discovered an insufficient number of disks for diskgroup "ASMGROUP" hmm got a challange. 9) drop disk 也不成,尝试 drop diskgroup. Y The PL/SQL script assumes that the Oracle Managed Files initialization parameters specified in step 3 “Set Oracle Managed Files initialization parameters to Oracle ASM locations” in “Migrating the Database to Oracle ASM Using RMAN”are set. This is accomplished by the ASM background process ASMB, which reads the spfile from the disk group and starts the instance itself. Mon Dec 09 13:42:48 2013. control_files=’+DISKGROUP’ db_create_file_dest=’+DISKGROUP’ db_recovery_file_dest=’+DISKGROUP’ 2) Shutdown the database :. How to add disk to ASM (DATABASE) runing in production server We have database running on ASM, after two years we faced the problem of space deficiency. 1) Identify the datafile to be moved. Absenteeism of failure groups were preventing diskgroup mount with missing disk. ASM(AUTOMATIC STORAGE MANAGER) Step by Step Migrating a ORACLE DATABASE FROM NON-ASM TO ASM [[email protected] Desktop]$ ps -ef |grep pmo. First, let's have a quick look at the procedure : from Oracle 11g, we have to use the renamedg command to rename a dismounted diskgroup, then the rough procedure is :. ORACLE ASM 在磁盘组,磁盘和文件的个数限制如下: (1)最多63个disk groups (2)最多10000个ASM disks (3)每个disk group里最多1百万个文件。 非Exadata 存储的情况下,ASM 存储大小限制: (若是exadata,则容量*2倍) (1)支持的每个ASM disk 最大容量是2 TB。. MOUNTED - Instance is successfully serving the disk group to its database clients. dg is dropped Step 2: Extract DDL (create diskgroup) command for RECO_FHDB from ASM alert log and replace redundancy clause and run create diskgroup command on ASM instance. New disk groups. An external redundancy disk group would be simply dismounted, so we will focus on the normal and high redundancy disk groups. Users who are granted the SYSOPER privilege on the ASM instance are allowed to start up, shut down, mount, dismount, and check disk groups (but not repair). We can drop a diskgroup forcefully. Once the ASM disks are dropped the data on them is rebalanced over to the remaining disks, until this operation is completed you should not touch the underlying physical devices. While it is possible to only use certain disks (0-5) for one disk group and others (6-11) for another diskgroup, this will result in a degradation of performance, due to only working on half of the available disks. SQL> select…. Drop the existing Diskgroup after backing up data and create a new Diskgroup with desired redundancy. From Oracle’s docs:. 4 sous win 2003 server. 2), you could place the Oracle ASM SPFILE in a disk group that has COMPATIBLE. Typically, Oracle uses a user named "oracle" for the database and "grid" for the Gridware and ASM, but you can set the system up to run everything as "oracle". To correct the proper group for the Database oracle executable, do: As the : $ cd /bin. MEMBER - Disk is a member of an existing disk group. The other option for multiple diskgroups is to drop the default griddisks and create new ones based on a new layout of diskgroups. break on DiskGroup skip 1 on report – set pages 255 select a. The default is EXCLUDING CONTENTS, which provides syntactic consistency and prevents you from dropping the disk group if it has any contents. ORA 15075: disk(s) are not visible cluster-wide I looked back and found that the scandisks was not done on all the nodes of cluster. Any Oracle ASM file is completely contained within a single disk group. ALTER DISKGROUP ALL DISMOUNT; ALTER DISKGROUP ALL MOUNT; ALTER DISKGROUP DISMOUNT; ALTER DISKGROUP MOUNT; 磁盘成员管理 为diskgroup增加disk. [crayon-5eb09daf30562603594174/] Now move the disk to OCRVD asm disk [crayon-5eb09daf3056e468615224/] Check the voting disk details again [crayon-5eb09daf30572580378483/]. Manage Access Control Lists (ACL) Show Access Control. Fixing 12c ASM and an adventure with "oracle restart" We've been playing around with ASM with a view to roll it out on all of our development environments. Money Baller Recommended. Under certain circumstances, you may wish to rename that diskgroup. Whenever a database closes its last file in a disk group, it dismounts the disk group. Users who are granted the SYSOPER privilege on the ASM instance are allowed to start up, shut down, mount, dismount, and check disk groups (but not repair). v$asm_diskでの候補ディスクの確認. The SQL statements introduced in this section are only available in an ASM instance. SQL> alter diskgroup dg_data mount restricted; Diskgroup altered. The default DISK_REPAIR_TIME attribute value of 3. Normally Disk groups are mounted at ASM instance startup and dismounted at shutdown. 0 or higher, whereas any database client whose software version is higher than or equal to 10. 1) Last updated on JANUARY 01, 2020. ORACLE ASM 在磁盘组,磁盘和文件的个数限制如下: (1)最多63个disk groups (2)最多10000个ASM disks (3)每个disk group里最多1百万个文件。 非Exadata 存储的情况下,ASM 存储大小限制: (若是exadata,则容量*2倍) (1)支持的每个ASM disk 最大容量是2 TB。. By Veeratteshwaran October 13, 2014 September 12th, active use of diskgroup "DATAGRP1" precludes its dismount SQL> SQL> DROP DISKGROUP datagrp1 FORCE INCLUDING CONTENTS; MIGRATE DATA FROM OLD ASM DISK TO NEW ASM DISK. Disk is not part of a disk group and may be added to a disk group with the ALTER DISKGROUP statement. alter diskgroup drop disk command also allows specifying a speed of the operation - alter diskgroup drop disk rebalance power. In most cases, the default value will be sufficient. com For Oracle ASM in Oracle Database 11 g, 10. For information about dropping disks, see“Dropping Disks from Disk Groups”. 2, if the COMPATIBLE. First Instance is a normal Database box and the second one is an EXADATA box. All databases files, Fast Recovery Area, Oracle Cluster Registry and Voting Files were stored in ASM disk groups. But if a disk has failed and ASM has initiated rebalance, there may be a legitimate reason for concern. While it is possible to only use certain disks (0-5) for one disk group and others (6-11) for another diskgroup, this will result in a degradation of performance, due to only working on half of the available disks. 1 – Cached - Disk is present in the storage system, and is part of a disk group being accessed by the Automatic Storage Management instance. Once the ASM disk groups were created, Oracle presented one last screen (Figure 2. Show ASM files; Show ASM disk groups; Show ASM disk group IO; Show ASM diskgroup and instance info; Show ASM failure groups; Show ASM diskgroup parameter; Show status of ASM rebalancing; Audit. SQL> alter diskgroup DBADATA rename disks all; NOTE : after renaming the disk group, original disk group resource in not automatically deleted. backup and restore the metadata of diskgroups 6. SQL> Restore asm metadata. SQL> ALTER DISKGROUP DataDG drop disk DISK18, DISK17, DISK16, DISK15; Diskgroup altered. ASM disk group A (1 disk) - 78 seconds - 192 Mb/sec ASM disk group B (2 disks) - 41 seconds - ~365 Mb/sec. ASM Views; Drop a file from diskgroup; Manage ASM Directories; Mounting and Dismounting a Diskgroup; Checking a Diskgroup; Rebalance a Diskgroup; Resize a Disk; Undrop Disk from Diskgroup 2009 (120) December (6) November (9) October (3) September (8) August (13) July (29). Starting from 11gR1, a disk that becomes unavailable is first offlined , the disk repair timer kicks in, and if the time exceeds the value specified by DISK_REPAIR. Create a DUMMY disk group. We ran into a situation where Oracle ACS delivered Exadata (Quarter Rack) with 20% of space allocated to DATA Diskgroup, and 80% to RECO! We requested the reverse. Applies to: Oracle Database - Enterprise Edition - Version 10. SQL> show parameter asm NAME TYPE VALUE ----- ----- ----- asm_diskgroups string DISK01 asm_diskstring string /dev/sd* asm_power_limit integer 1 asm_preferred_read_failure_groups string Mount / Dismount the ASM diskgroup. The operation can be done online in oracle 11G R1 onwards; we plan to do this offline as the environment is 10204. The environment is Oracle 11. Adding a disk to an ASM diskgroup is really simple, just an alter command. without a downtime. OCR Diskgroup became inaccessible after storage one disk fault on raid 5 configuration Database version:Enterprise Edition -Version 11. Using MOUNT and DISMOUNT options you can make one or more Disk. An external redundancy disk group would be simply dismounted, so we will focus on the normal and high redundancy disk groups. Set the DB_CREATE_FILE_DEST and optional DB_CREATE_ONLINE_LOG_DEST_n initialization parameters to Oracle ASM disk groups. Manage Access Control Lists (ACL) Show Access Control. As a part of migrating the ASM to a new SAN storage and would like to add the new disks to the existing the ASM disk group and plan to drop the old disks. SQL> alter diskgroup dg-name mount restricted; New commands in ASMCMD. The disk group cannot be mounted on more than one node. NAME TYPE VALUE. 00$ export ORACLE_SID=+ASM-bash-3. Home » RDBMS Server » Server Administration » ASM Diskgroup dismounted - how to drop disk from? Show: Today's Messages:: Show and mount diskgroup and restore oracle files. an Oracle ASM disk group. ALTER DISKGROUP ALL DISMOUNT; ALTER DISKGROUP ALL MOUNT; ALTER DISKGROUP DISMOUNT; ALTER DISKGROUP MOUNT; 磁盘成员管理 为diskgroup增加disk. All data files will be migrated to the newly created disk group, DATA SQL> alter system set db_create_file_dest='+DATA'; System altered. SQL> ALTER DISKGROUP data MOUNT;. Disk Group Name State Type ----- ----- ----- DATA01 MOUNTED EXTERN FRA01 DISMOUNTED GRID MOUNTED EXTERN SOLUTION : Use this solution only while creating a new DISKGROUP and it is ok to remove the DISKGROUP and recreate. The trick was to re-initialize the disks (clear ASM metadata) before re-creating it. diskgroup – Name of disk group to drop. Take archive backup from prod and apply to. Vamos a realizar prácticas de creación de Disk Groups con el asistente ASMCA Documentación en Tahiti -> Masters Book List -> Automatic Storage Management Administrator’s Guide -> 11 Oracle ASM Configuration Assistant -> Creating Disk Groups -> Managing Disk Groups with Oracle ASM Configuration Assistant. You can override this attribute with an ALTER DISKGROUP DISK OFFLINE statement and the DROP AFTER clause. So, ASM dismount the diskgroup. MGMTDB has been relocated on to a dedicated diskgroup +GIMR as per my another post "How to Move 12c Grid Infrastructure Management Repository ( GIMR ) to Another Diskgroup". Besides, Oracle ASM has a minimal performance impact on a server. Step 1: Drop Diskgroup SUCCESS: drop diskgroup RECO_FHDB including contents Tue Jul 17 22:55:09 2012 NOTE: diskgroup resource ora. resize the RECO diskgroup. Since the file descriptors were held, customer got downtime on 21st Jan 2012 to restart ASM instance to release the locks. DROP DISKGROUP ASM Bonjour, Env Oracle 10. By the time the Unix Sys Admin returned the disk it was unrecognozable by ASM as the disk headers had been overwritten. Thus, Oracle won’t automatically remove these files when it does not have any further need for them. To shut down the local ASM instance, you can use the various options available with the SHUTDOWN command in the SQLPLUS prompt. For the purpose of this guide, the previously identified database file will be moved from the +TESTDB_DATA2 diskgroup to the +TESTDB_DATA1 diskgroup. SQL> # drop diskgroup RMAN_BKP FORCE INCLUDING CONTENTS; Don't perform this in production. The CREATE DISKGROUP statement mounts the disk group for the first time, and adds the disk group name to the ASM_DISKGROUPS initialization parameter if a server parameter file is being used.