topic Re: Can I decrease the size of a Virtual Volume in HPE 3PAR StoreServ Storage

Can I decrease the size of a Virtual Volume

Hienpt — Thu, 27 Aug 2015 11:13:28 GMT

Hi,

My customer needs to decrease the zise of a virtual volume on HP 3PAR 7400c from 3TB -> 1TB. Can they do that ?

Thank you.

Re: Can I decrease the size of a Virtual Volume

Sheldon Smith — Thu, 27 Aug 2020 12:51:10 GMT

Short answer?
No.

If a Virtual Volume (VV) is created thin, it will only use what storage is requested, so if the operating system only creates a partition of 1 TB, that is all that will be consumed.

However, the virtual size of a VV can only be increased, up to the 16 TB limit.

If they need a smaller virtual size, they will need to

create a 1TB VV
present that to the host in question
stop applications to the 3TB LUN
use the OS to transfer all files
unpresent both VVs
present the 1TB VV using the original 3TB volume's LUN assignment (<- edited for clarity)
start the applications back up.

Note: While I work for Hewlett-Packard, all of my comments (whether noted or not), are my own and are not any official representation of the company.
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Re: Can I decrease the size of a Virtual Volume

Hienpt — Thu, 27 Aug 2015 14:38:25 GMT

Hi,

Thanks for your solution.

Thank you.

Re: Can I decrease the size of a Virtual Volume

ehsankhayyat — Fri, 28 Aug 2015 18:20:39 GMT

Hi ,

what do you mean in step 6 : present the 1TB VV using the original 3TB's volumes assignment ?

Re: Can I decrease the size of a Virtual Volume

Sheldon Smith — Fri, 28 Aug 2015 23:39:42 GMT

It would depend on the operating system and applications, but reuse the original LUN numbers, and original drive letters and/or mount points.