Recovering unused space from ASM disk groups
Hi,
Actually we are having 4 diskgroups in which total 49 disks are there.Now we want to remove around 20 disks ( 20x200 = 4000 GB) from the diskgroups. Database which is using these disk groups are using only 45% of total disk space.
For removing these disks,
1. First, I need to drop the disk using ALTER DISKGROUP <name> DROP DISK <name>; Is this correct way?
2. Need to check asm_operation view and monitor the rebalancing. correct?
3.Need to check the status column of asm_disk view, once the status changed to drop, then we can physically remove the disk. Correct?
Please correct me If I am wrong in any of the above steps.
And also Please suggest a way to drop all the 20 disks at the same time.
Waiting for your reply.
Thanks,
SV