ZFS Pool of Mirrors that vary in size

T_Minus

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Feb 15, 2015
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Can ZFS handle a pool of mirrors that vary in size and work just fine?
 

gea

Well-Known Member
Dec 31, 2010
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ZFS has no problem with unbalanced pools of different vdev types or sizes. I do that quite often with my backupsystems where I replace a vdev with larger disks when I need more capacity when number of disk bays is limited.

Only problem is a reduced performance as ZFS cannot spread data equally over all vdevs for a best performance but must assign them to a single vdev with more free capacity.