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ESX 5.5: reclaim thin provisioned space

Hi All,

I'm in the process of migrating an old file server to a new file server.  They both sit on the same SAN volume and are both thin provisioned.

I though as the data moved across it would release the space.  But this doesn't seem to be the case.

Is there a way to release unused thin provisioned space?


Many thanks
D
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detox1978
Asked:
detox1978
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6 Comments
 
CESNetwork AdministratorCommented:
There is a command called "unmap" that you can run for this:

https://kb.vmware.com/s/article/2057513
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
What are you expectations, release space where ?
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detox1978Author Commented:
I've got two VMs on the same datastore.  I thought as I moved files between the two servers the total consumption would stay the same.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
so you got two VMs (thin) disks, and you expected the the space in the VMDK to increase as you moved files from it to the other VM disk ?

have a look at this article, you've got some admin/management to do...

https://community.hds.com/docs/DOC-1006003

and to be honest with you, sometimes life is too short to do all this...!!!
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detox1978Author Commented:
I thought the datastore space would stay the same.  As the files are moving from one  thin provisiined VM to another on the same datastore.  But at the moment the original server is holding onto its space.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
because the blocks have already been written to! and the thin disk has been expanded.....

think of it this way, a zero has become a one......on the sector in the disk...and moving data off, is not going to change that...

the data has not been zeroed, or emptied, it still remains in the NTFS, and could be recovered, just the file table is altered.
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