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February 23rd, 2012 16:00
Shrink a pool on Celerra and reclaim disks for CLARiiON use.
I currently have a pool named CLARATA_ARCHIVE that contains several file systems for CIFS.
I believe these are made up of d9, d10, d11, and d12 which are 1.8TB each which equals my 7.2TB pool size. The problem is I currently have 3.9TB free on that pool and would like to use that space for the back end CLARiiON which is where we serve up our block level iSCSI storage from directly off the service processors.
NS-480, Celerra 5.6
One RAID 5 (8+1) Groups (SATA) connected to Celerra:
RG 10 - LUN 18(d9), LUN 19(d11), LUN 20(d10), LUN 21(d12)
Any suggestion on how I can shrink the pool and reduce the LUN sizes on the CLARiiON so that I can remove disks from RG10?
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SAMEERK1
296 Posts
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February 24th, 2012 01:00
Hi,
check the output of this command
$nas_disk -list
and see if the disks which are from those pool free, if yes you can delete the disks and unbind it using
$nas_disk -delete -unbind <<< this command will unbind the lun from the backend Clariion so confirm the disks before you run the command.
or you can just delete the disk and remove it from the storage group from backend and move to desired SG
Sameer Kulkarni
Rainer_EMC
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8.6K Posts
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February 24th, 2012 06:00
You need to find out which file systems are using these meta’s / dvols and then relocate (Replicator or nas_copy) or delete them.
See /nas/tools/whereisfs
After that you can delete the stripes and unbind the LUNs with nas_raid
Rainer