Re: CVS commit: src/sys/dev/scsipi

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Sat, 11 Jul 2020 18:24:51 +0300
    From:        Kimmo Suominen <kim%netbsd.org@localhost>
    Message-ID:  <20200711152451.GA1591%homeworld.netbsd.org@localhost>

  | On Sat, Jul 11, 2020 at 05:00:02PM +0200, Martin Husemann wrote:
  | > I don't understand the change. When was this broken? This has always worked
  | > for me e.g. with the sd0 at LUN 3 and the controller at 6 or 7.
  |
  | I think all real SCSI hardware I've had has always just only had LUN 0,
  | and each disk has been on its own SCSI ID (target).

Just to make things clear here, the LUN you're talking about is not
the scsi unit number (which is what I think Martin was referring to)
but a sub-device number within a single scsi ID.   Right?

In real scsi hardware, the only place I think I've ever seen other than
LUN 0 is in a raid array device, where there is a single scsi bus
attachment, with a single ID, and then each raid volume created gets
a different LUN (not all scsi raids work that way I think, but some do).

kre