One of the frequently asked questions regarding ZFS. Is it possible to resize a RAIDZ, RAIDZ2 or MIRRORED ZPOOL?
The answer is a littlebit complicated…
If you want to change the ‘geometry’ of the ZPOOL (for example: change from a mirrored pool to a raidz, or simply add a disk to a raidz, or change from raidz to raidz2) then the answer is no.But it is possible to change the disks of a pool with bigger ones and use the space.
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- FreeNAS 0.686b2 released
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- FreeNAS 0.686b1 Released
- FreeNAS 0.686 (stable) released

I’ve written a new post regarding the resize of a zpool.
Regards,
harryd