How ZFS handles online replacement in a RAID-Z (theoretical)
- by Kevin
This is a somewhat theoretical question about ZFS and RAID-Z. I'll use a three disk single-parity array as an example for clarity, but the problem can be extended to any number of disks and any parity.
Suppose we have disks A, B, and C in the pool, and that it is clean.
Suppose now that we physically add disk D with the intention of replacing…