[PVE-User] zfs raidz2 expansion

[Randy Bush]

running 8.4.1 with images on 4x2tb raidz2 ssds (zfs-2.2.7-pve2).  we
want to double the space.  the net of a million lies says all sorts of
things about expanding raidz2.  as we do full replication, we could just
create a new pool for replocation and call it a day.  but i am curious
if we can just expand the current pool.  my reading says doubtful, but
am not deeply clued.

randy

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https://forum.proxmox.com/threads/raidz-expansion.135413/
https://github.com/openzfs/zfs/pull/15022