Increase the capacity of a RAIDZ1 vdev on ZFS

Question

I'm running FreeNAS on a Mini-ITX Box at home. I have 3x3TB HDDs in a RAIDZ1 udev. Now I'm running out of space. I have space for one additional HDD in my case. I want to convert the 3x3TB RAIDZ1 into a 4x3TB RAIDZ1.

Can I do that without sending a snapshot to some other disk, then completely rebuild the vdev/zpool and restoring the snapshot? Are there any other options I am missing?

score 0 · Accepted Answer · answered Oct 03 '15 at 13:43

0

You cannot. The only way to increase space in raidz without rebuilding it is, while keeping the number of drives constant, to switch each drives to a bigger one and resilver each changed drive. After 3rd drive change and resilver you will get additional delta, equal to smallest space delta of one of the new drives.

answered Oct 03 '15 at 13:43

drookie

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+1 for BtrFS. Flamewar: ON :-). SCNR. – koloman Oct 03 '15 at 20:41
Never heard of it. Must be some academic beta of athoner one killer-fs. – drookie Oct 03 '15 at 20:46

Increase the capacity of a RAIDZ1 vdev on ZFS

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