1st
Method
11gR2_OCR_VOTE
In case you wish to move OCR and Voting disk out of the current diskgroup,
you can follow below steps. These steps can also be used to move files from ASM
Diskgroup to Netapp filer and vice versaWe wish to move OCR/Voting disk from
Diskgroup DATA to DG_DATA01
1) Create the new diskgroup DG_DATA01
2) Ensure that ASM Compatability is set to 11.2
select name,COMPATIBILITY,DATABASE_COMPATIBILITY from V$ASM_DISKGROUP where name='DG_DATA01';
NAME COMPATIBILITY DATABASE_COMPATIBILITY
-------- ---------------- --------------------------
DG_DATA01 10.1.0.0.0 10.1.0.0.0
In case it is not, then you can change it using following command
alter diskgroup DG_DATA01 SET ATTRIBUTE 'compatible.asm'='11.2';
3) Replace voting disk using crsctl command as oracle user. You can do
this without stopping the clusterware
crsctl replace votedisk +DG_DATA01
Successful addition of voting disk 241b1e0a36344f7bbfaca4a576d514e9.
Successful deletion of voting disk 72e47e5e3afb4fe9bfb502b1b4340503.
Successfully replaced voting disk group with +DG_DATA01.
CRS-4266: Voting file(s) successfully replaced
To list the voting disk
crsctl query css votedisk
## STATE File Universal Id File Name Disk group
-- ----- --------------- --------- ---------
1. ONLINE 241b1e0a36344f7bbfaca4a576d514e9 (ORCL:DISK4) [DG_DATA01]
Located 1 voting disk(s).
4) To replace OCR, we need to have multiple OCR configured. In our case
we need to add OCR to new diskgroup and delete old one. We need to run this
command as root.
[root ~]# ocrconfig -add +DG_DATA01
[root ~]# ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 2424
Available space (kbytes) : 259696
ID : 579998313
Device/File Name : +DATA
Device/File integrity check succeeded
Device/File Name : +DG_DATA01
Device/File integrity check succeeded
Device/File not configured
Device/File not configured
Device/File not configured
Cluster registry integrity check succeeded
Logical corruption check succeeded
[root ~]# ocrconfig -delete +DATA
[root ~]# ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 2424
Available space (kbytes) : 259696
ID : 579998313
Device/File Name : +DG_DATA01
Device/File integrity check succeeded
Device/File not configured
Device/File not configured
Device/File not configured
Device/File not configured
Cluster registry integrity check succeeded
Logical corruption check succeeded
Verify that OCR location is pointing to the correct diksgroup on both
nodes.
# cat /etc/oracle/ocr.loc
#Device/file +DATA getting replaced by device +DG_DATA01
ocrconfig_loc=+DG_DATA01
local_only=false
5) ASM Parameter file is also present in same diskgroup. In case you
wish to remove it, then follow below steps
SQL> create pfile from spfile;
File created.
SQL> create spfile='+DG_DATA01' from pfile;
File created.
You will need to restart the cluster on both the nodes as ASM instance
is still using the file. Run following commands on both the nodes
crsctl stop cluster
crsctl start cluster
NOTE:-The
same is not the case with Voting device. Once you move voting devices from raw
devices to ASM Diskgroup, it’s not possible to add or delete voting files from
ASM diskgroup as shown below.
[root@RAC2 bin]# ./crsctl add css votedisk
/dev/raw/raw2
CRS-4258: Addition and deletion of voting files are
not allowed because the voting files are on ASM
SOLUTION : - multiplex voting
disk
1) check voting disk
[oracle@myrac-1 bin]$ crsctl query css votedisk
##
STATE File Universal Id File Name Disk group
--
----- ----------------- --------- ---------
1. ONLINE
37b49fb451214f06bf9cb720358bb189 (/rac/rhdiskdata01) [DATA]
Located 1 voting disk(s).
2) multiplex voting
disk (as root or sudo)
Uset ‘crsctl replace’ to relocate/multiplexing Voting disk to another ASM disk group (With normal redundancy)
Uset ‘crsctl replace’ to relocate/multiplexing Voting disk to another ASM disk group (With normal redundancy)
/u01/app/grid/product/11.2.0/bin/crsctl replace
votedisk +CRS
3) check newly
added voting disk
[oracle@myrac-1 bin]$ crsctl query css votedisk
##
STATE File Universal Id File Name Disk group
– —– —————– ——— ———
1. ONLINE
afb77b2693a24f1ebfe876784103e82a (/rac/rhdiskdata03) [CRS]
2. ONLINE
3e2542c5b1154ffdbfc5b6dea7dce190 (/rac/rhdiskdata04) [CRS]
3. ONLINE
5e0f3c5921cc4f93bf223de1465d87cc (/rac/rhdiskdata05) [CRS]
Located 3 voting disk(s).
Note that we cannot
use the ‘crsctl add css votedisk’ to add a vote disk on ASM disk group/ACFS
file system. We can use crsctl replace votedisk’ to move voting disk to a ASM
disk group with normal redundancy. The new ASM Diskgroup has minimum of 3 fail
groups (total of 3 disks). This configuration will provide 3 Voting Disks (1 on
each fail group) and a single OCR which takes on the redundancy of the disk
group. Hence, use separate disk group with normal redundancy with one disk
quorum is the method to multiplexing voting disks.
