First, you may be telling the 2940 to scan for boot disk, I think.  I
have
used scanning for first bootable drive on some adapters, and I sometimes
set a boot id.
I can't remember if this is my 2940 and I can't take my servers down to
check!  Just in case I'm right, if you use scanning, don't have multiple
boot
partitions, a poorly installed / maintained boot partition suddenly
chosen
first can cause your issues, something that looks bootable may be on the
IBM.
I prefer to tell the adapter thru setup exactly which device to boot.
With the 2940, it can be any id other than the adapter's.
Next, I would disconnect all devices except the boot device.  This will
prove the termination etc is correct.  Add devices one at a time.
With the wide connector, I have seen your trouble just from a poor
connection.
Why aren't the cdroms on the 2940?  If this is not a server, you won't
gain
any significant performance by using two adapters.  There are even some
extreme cases where you are degrading performance.  Adaptec recommends
you
set the cdrom ids lower than the hard drives if you put them all on the
2940.
Tom Turak


-----Original Message-----
From: Brad Loomis [mailto:[log in to unmask]]
Sent: Wednesday, December 27, 2000 3:31 PM

Hi list,
I have just installed a new Plextor 40X CD-ROM and a Plextor 121032CD-RW
all
SCSI on a new added AVA2906 Adaptec. Since I had everything apart, I
wanted
to rearrange the drives in the case. I set about to reassign ID's for
the
HDDs so I could place them where it would be more convenient and logical
in
the case with the addition of the new CD drives. However in doing so I
could
not get things to boot. My question is, in order to do this, do I have
to
reformat and start over to change my boot drive IDs? At present things
are,
ID-0 4.5GB boot drive, Seagate Cheetah is drive C:
ID-1 4.5GB pretty much empty, Seagate Cheetah D:
ID-3 4.5GB back up. IBM. The terminated drive, end of chain. E:
These are on an Adaptec 2940UW.
I tried to basically reverse the order of install on the chain, due to
better fit in the case. I set the IBM to 0, empty drive to ID-1, and
boot
drive to ID-3, with termination. I got nothing to show up on the bus
scan at
boot up in this configuration.

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