From: Brandon S. Allbery (kf8nh@kf8nh.wariat.org)
Date: 01/30/93


From: kf8nh@kf8nh.wariat.org (Brandon S. Allbery)
Subject: SCSI weirdity: 0.99.4 + AHA1542B + Fujitsu M2622FA = "phantom" drives?
Date: Sat, 30 Jan 1993 14:03:04 EST

I just installed an AHA1542B and a Fujitsu 330MB SCSI hard drive last night.
The Adaptec is SCSI LUN 7 (default) and the hard drive is LUN 0 (also
default). The BIOS is *enabled* because I don't have the ASPI stuff (yet)
and I want to access it under DOS as well as Linux.

Everything works. But there is one weird thing that happens at bootup: the
Linux SCSI driver thinks the drive is at *all* SCSI LUNs including LUN 7! I
haven't tried to do anything with the "phantom" drives, but the kernel does
grab partition tables from all of the phantoms (they're all identical to the
partition table on the real drive).

Since I ran with this configuration for about an hour last night after
copying /usr into a partition and mounting it on top of the original /usr
(fast recovery, just edit /etc/fstab :-) and using a swap partition on the
drive as well, including X and some compiles, it doesn't appear to signal a
severe problem. But it *does* have me wondering... is this a known problem
that isn't in my (slightly dated) FAQ, or a configuration problem, or ???
(I can almost see where there might be a problem with switching from the
BIOS to a real driver, but I would hope that there would be a way around it.)

++Brandon