SCSI Disk not found

[horio shoichi]

On Wed, 03 Dec 2003 00:12:06 -0500
"Michael E. Mercer" <mmercer at nc.rr.com> wrote:
> Ok. I have what looks to be two host adapters.
> The one on the motherboard and a PCI? card.
> 
> Not sure what exactly I am supposed to do for I have never
> had a PC with SCSI before...
> 
> Any help is appreciated.
> 
> Thanks
> MeM
> 
> On Tue, 2003-12-02 at 23:57, Mike Maltese wrote:
> > > I was given a Compaq Proliant 800 machine...its a pentium pro
> > > 200 MHz. I got 4.9-Stable installed and everything is running
> > > smooth.
> > >
> > > However, I noticed that is does indeed have two scsi disks,
> > > but freebsd only finds one.
> > >
> > > Attached is the dmesg... notice the sym0 and sym1.
> > > Does this supposed to tell me anything?
> > 
> > Yes, it is. Either the host adapter has two channels or you have two host
> > adapters in the machine. I'm not sure what card you have exactly, but my
> > guess is that it's the former. I would crack the box open and see what's
> > what with the SCSI configuration.
> > 
> 
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Having two (or more) controllers is just a common practice. It is by no means
any wrong per se. And, hooking drives in whatever controllers you have in any
order is, again, no wrong, PROVIDED each controller sees the drives connected
to it have respective distinguishing signatures, i.e., each drive has distinct
target id (and unit id, but somehow disks are always assigned unit id zero).

Looking back the thread, my guess is that you connected the two drives in one
controller (whichever, I don't know) giving the drives identical target id
(i.e., zero). So you violated the last condition.

See target id on one of the drives (maybe 3-4 dipswitches if the drives are
internal ones). Change it within [1 - 6] range. (Leave one drive with target
zero (to speed up bootstrapping, doh) and seven since it is the id controller
has assigned to itself).



horio shoichi