A pool or vdev in the
<literal>Degraded
</literal> state has one or more disks that have been disconnected or have failed. The pool is still usable, but if additional devices fail, the pool could become unrecoverable. Reconnecting the missing devices or replacing the failed disks will return the pool to an
<link linkend="zfs-term-online">Online
</link> state after the reconnected or new
device has completed the
<link linkend="zfs-term-resilver">Resilver
</link> process.