On Thu, Dec 15, 2022 at 09:07:28AM +0100, Ulrich Windl wrote: > Actusally I have no idea, but as a user of FC SAN systems I can remember a case when a storage system had to present a dummy LUN0 to enable hosts to find other LUNs (while LUN0 was never actually used). Maybe the client code was imperfect, I don't know. Ignoring some of the well known LU bits that never really became practically relevant, lun0 is needed to use the REPORT_LUNS command to scane for the other logical units. But unless the PQ says it actually is a valid logic unit, we never add a sdev for it.
