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Reclaim thin LUN storage?
Is there a method or tool available to reclaim used capacity in a thin LUN after it has grown (consumed the thin space) and then decreased in size? For example, I assign a 5TB thin LUN to a host (in this case direct pass-through to a vm) and fill it up to 4.5TB. But then I delete 3.0TB of it's data and it is now only consuming 1.5TB. But the VNX/Unisphere still thinks that the used capacity of the thin LUN is 4.5TB.
There are techniques within VMware for thin VMDK's that allow you to clear out empty blocks so that vSphere see's the correct amount of thin space. Are there any similar methods with the VNX thin LUNs?
Thanks
Would you take that article to mean that after running sdelete, I would still need to migrate the LUN or turn on compression for the thin space to re-claim? It's a really big LUN, 7TB to be exact. It looks like Sdelete is going to take days to finish, ouch. Sure would be nice if the VNX would just recognize zero'd space and show it re-claimed.
Is a LUN migration still the only method to reclaim thin lun storage after an sdelete on the latest VNX OE?
Also, the following link is an alternative to sdelete for those of us who use mounted volumes:
http://blog.whatsupduck.net/2012/03/powershell-alternative-to-sdelete.html
dynamox
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Posted April 30th, 2012 19:00
sdelete -c and then LUN Migration ..have not tried it myself.
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