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>