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Re: iti-4120

--On Saturday, March 04, 2006 02:54:30 PM -0500 Jay Estabrook <Jay.Estabrook@hp.com> wrote:

On Fri, Mar 03, 2006 at 01:43:20AM -0800, Bill MacAllister wrote:
I just tried putting an iti-4280 in a AlphaServer and encountered the
following problem.  The controller is configure with 5 disks on the A
bus  and 3 disks on the second bus.  From SRM I can see all 8 disks, but
when  Linux boots it creates 4 disk devices, two from the first bus and
two from  the second bus.  Does this make any sense?  When I put 7 of
the disks on a  single iti-4140, all seven are seen and the system boots
just fine.  I  would appreciate any insights.

Only thing occurs to me is bus termination issues; some drivers are
more sensitive to that.

Does it ALWAYS see ALL of however many disks that are installed on one
of the cables, but not always all that are installed on the other
cable? If so, then suspect the second cable and/or its termination.

Good luck.


SRM always sees all of the disks. This is a DECServer 5305 box with the integral StorgeWorks shelf and an external StorageWorks shelf. I'll check the switches on the personality board of the external box.

This is really puzzling though. I have add to add /dev devices to support more than two tape drives on a system before. It looks like a similar situation to me. I don't really know how /dev/sd devices get created. Is this the responsibility of the driver?


| Bill MacAllister
| 14219 Auburn Road
| Grass Valley, CA 95949

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