I have a running freenas zfs on raid-z1. For safety i though of increasing parity. Enough spare space is available.
Is it possible to upgrade a zfs raid-z1 to raid-z2 or raid-z3?
thx for your help
Unfortunately, no; you cannot re-shape a RAID-Z group to a different level of RAID-Z, you'd need to move the data elsewhere and add the disks to the pool with the desired level at the time of creation.