Very Computer

Hi. I've recently finished building a dual-processor machine
built round a Supermicro P6DBS motherboard. The hard disk
is an 8 gig wide scsi driver, configured as scsi ID 0, on the first
wide scsi channel. There are normally no other disks. I use Lilo to boot
the machine, and all is well.
Today, I decided to attach an IDE hard disk with an ext2 filesystem
on it on order to copy some files off it. Once again, everything was
happy. While the IDE disk was attached, I did a kernel build (make -j
runs in 2 minutes 20 seconds!). I then installed the new kernel in my
lilo.conf, and ran lilo. Lilo said:
Warning: /dev/sda is not on the first disk
I'm not too sure what this means, or what lilo thinks of as 'first'.
When I tried to boot the machine, I got
L 01 01 01
&c.
I've since recovered by removing the IDE disk, booting from floppy,
and re-running lilo. However, I'd be very interested in advice as to
what's
going on here. If it makes any difference, booting from IDE is disabled
in
the bios; it's looking at floppy, then scsi, and nothing else.

Any thoughts appreciated.

James

Hi,

[ ... SCSI-only system ... ]

Quote:>Today, I decided to attach an IDE hard disk with an ext2 filesystem
>on it on order to copy some files off it. Once again, everything was
>happy. While the IDE disk was attached, I did a kernel build (make -j
>runs in 2 minutes 20 seconds!). I then installed the new kernel in my
>lilo.conf, and ran lilo. Lilo said:
>Warning: /dev/sda is not on the first disk
>I'm not too sure what this means, or what lilo thinks of as 'first'.

Have a look at:

     http://www.suse.de/support/sdb_e/ke_eide-scsi.html

for a short explanation and solution, or consult the original lilo docu
for the complete stuff.

Quote:>When I tried to boot the machine, I got
>L 01 01 01
>&c.

Of course. 01 = "device not accessible", referring to BIOS device
0x81 (this is the device number LILO stored away for accessing the
/dev/sda during boot). 0x81 is your SCSI disk if the BIOS boots from
IDE first, or your IDE disk if the BIOS boots from SCSI first. Anyway,
it's indeed inaccessible during boot.

Quote:>I've since recovered by removing the IDE disk, booting from floppy,
>and re-running lilo. However, I'd be very interested in advice as to
>what's
>going on here. If it makes any difference, booting from IDE is disabled
>in
>the bios; it's looking at floppy, then scsi, and nothing else.

Add the following to the global section of your /etc/lilo.conf
and rerun /sbin/lilo:

disk=/dev/sda
  bios=0x80      # SCSI disk is meant to be 1st BIOS disk

Quote:>Any thoughts appreciated.
>James

Best regards,
                        Klaus.

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