topic Re: Reallocate Existing Volumes with Snapshots in ONTAP Discussions

Reallocate Existing Volumes with Snapshots

MRJORDANG — Thu, 05 Jun 2025 06:22:27 GMT

Hello,

I've added several disks to an aggregate. I'd like to reallocate existing volumes and snapshots of those volumes across the new disks in the aggregate. Is there any way to reallocate a volume and its snapshots across the new disks in an aggregate?

Everything I've come across seems to indicate that one must delete all volume snapshots before reallocating a volume across the new disks is possible. I hope there is a way to reallocate volumes without deleting their snaps! 🙂

Thanks,

Jordan

Re: Reallocate Existing Volumes with Snapshots

MRJORDANG — Thu, 19 Jul 2012 15:36:09 GMT

Looks like I can use the -p option with the reallocate command. (reallocate -p), Time to look into that option.

Re: Reallocate Existing Volumes with Snapshots

kotapavan — Thu, 19 Jul 2012 16:21:10 GMT

Yes, you can use the -p option, but make sure the volume has some extra free space as the snapshot sizes grow more than expected as this is a physical reallocation.

Re: Reallocate Existing Volumes with Snapshots

RAVI_PALADUGU — Thu, 19 Jul 2012 17:41:48 GMT

Please find the attached document for accurate information.

Re: Reallocate Existing Volumes with Snapshots

HENRYPAN2 — Thu, 19 Jul 2012 17:45:05 GMT

Thanks Ravi for share the note

Cheers

Henry

Re: Reallocate Existing Volumes with Snapshots

aborzenkov — Thu, 19 Jul 2012 17:47:05 GMT

To redistribute data across disks you should use "reallocate -A". Simple reallocate will not touch snapshot data.

You should consider removeing aggregate snapshots, as reallocation will cause "growth" of them.

Re: Reallocate Existing Volumes with Snapshots

MRJORDANG — Thu, 19 Jul 2012 17:48:22 GMT

Thanks for sharing the tech note!

Re: Reallocate Existing Volumes with Snapshots

RAVI_PALADUGU — Thu, 19 Jul 2012 17:51:54 GMT

Hi Jordang,

If you feel your question is answered you can please mark the question as answered.

Thanks

Ravi

Re: Reallocate Existing Volumes with Snapshots

MRJORDANG — Thu, 19 Jul 2012 17:52:59 GMT

Done.