Separating ZFS Mirrors

[antplugger]

Hi All,

Hoping to make some changes and just wanted to check, in case I mess things up.

I have a pool with 2 x 1TB NVME mirrored and 2 x 500GB NVME mirrored. I would like to remove the 2 x 500GB.
Is there a way to do that safely without going to backup / restore ?

Thanks for any guidence.

 

[LnxBil]

Is there a way to do that safely without going to backup / restore ?

Yes, zfs has a new function called zpool remove that is able to do what you want. I would still recommend to have backups though.

 

[fabian]

and you should keep in mind that the resulting pool will be a bit slower when accessing the "evacuated" data (it requires a level of indirection to lookup the actual, new location of the data) compared to the "backup everything, restore on new fresh pool" approach. it shouldn't be too bad given your hardware, but on spinning disks it might matter.

 

[antplugger]

Thanks all for the help. I will backup and then try this out. Thanks again

 

[antplugger]

Confirmed zpool remove worked perfectly.

Thanks all for the help.

Also, sorry for being dim, how do you mark a thread as being solved ?

 

[fabian]

edit the first post