L2ARC: inexplicable disappearance of cache device (was: CURRENT: ZFS freezes system beyond reboot)

From: Graham Perrin <grahamperrin_at_gmail.com>
Date: Thu, 16 Dec 2021 00:41:27 UTC
On 15/12/2021 17:55, FreeBSD User wrote:
> … SSD, partioned into two halfes, one for ZIL, the other for
> L2ARC. When showing "zpool status", the RAIDZ's HDDs (Hitachi/Seagate
> 4 TB NAS HDD) where "online", ZIL was "online" and
> L2ARC device/vdev showd - nothing. …


The 'nothing' aspect reminds me of:

L2ARC: inexplicable disappearance, without removal, of cache device
<https://github.com/openzfs/zfs/discussions/12519>