The RH6 install program says my SCSI disk is not configured,
although it currently holds a succesful 5.1 installation. I
am using an Iwill 2930U+ SCSI adapter (i.e. Advansys). I
also have an IDE disk on my system, which is recognised.

Output from the install program is as follows:

<4> scsi: aborting command due to timout: pid 10, scsi 0,
channel 0, id 3, lun 0Read capacity 00 00 00 00 00 00 00 00
00
         (occurs several times trying different pid and id)

<4> SCSI host 0 abort (pid 10) timed out - resetting
<4> SCSI bus is being reset for host 0 channel 0
<4> advansys: asc_isr_callback: board 0: scp c0ffca00 not on
active queue
<4> sda: sector size 0 reported, assuming 512.
<4> SCSI device sda: hdwr sector=512 bytes. Sectors=1 [0MB]
[0.0GB]
<4> sda:scsidisk I/O error: dev 08:00, sector 0
<4> unable to read partition table

Then the install continues without the SCSI disk
(obviously), just the IDE disk.

As I say. I'm already running a successful 5.1 from this
drive. Low-level reformat doesn't improve things either;
I've just had to re-install 5.1.