ahd0 dumps when an ext. raid attached

[Rong-en Fan]

On 2/5/07, Scott Long <scottl at samsco.org> wrote:
> Rong-en Fan wrote:
> > We have an ahd0 on IBM x236 server:
> >
> > ahd0: <Adaptec 29320LP Ultra320 SCSI adapter> port
> > 0x4000-0x40ff,0x4100-0x41ff mem 0xcfffe000-0xcfffffff irq 25 at device
> > 12.0 on pci3
> > ahd0: [GIANT-LOCKED]
> > aic7901A: Ultra320 Wide Channel A, SCSI Id=7, PCI-X 67-100Mhz, 512 SCBs
> >
> > The server runs i386 6.2-RELEASE. There is a tape driver on this card. When
> > I attach an external RAID (U160, scsi chip is LSI1020, I think), ahd0
> > gets unhappy.
> > It dumps when the kernel tries to probe the device.
> >
> > The verbose boot log is at
> >
> > http://www.rafan.org/tmp/ahd0.dump.txt
> >
> > This RAID works fine if I attach it to a LSI card. But due to other
> > reasons, I can
> > not use LSI card on this server.
> >
> > Suggestions are welcome.
> >
> > Regards,
> > Rong-En Fan
>
> The chip is detecting many transmission errors.  Maybe you have a bad
> cable?  Try using the BIOS to force all targets to U160 or lower.  You
> should also try forcing packetized mode off from the BIOS.  If it's not
> the cable then there is some sort of major incompatibility with the
> firmware of that device.  Other OS's might be covering it up by
> automatically doing domain validation and silently downshifting the
> speed.

My problem is solved by enable BIOS Multiple LUN support in Adaptec
U320 bios. I don't touch other settings, i.e., default values.

Regards,
Rong-En Fan


>
> Scott
>