Re: 18 gig scsi disk and linux 2.2.5

From: Richard B. Johnson (root@chaos.analogic.com)
Date: Thu May 04 2000 - 17:12:05 EST


On Thu, 4 May 2000, Greg Hennessy wrote:

> I have a DELL poweredge 4300 that i'm trying to add a seagate ST318416N
> 18 gig drive to the 7860 adaptec controller. The bios can recognize
> the drive fine, and so can an SGI Challenge, so I feel sure the
> hardware and cabling work correctly. The linux kernels (2.2.5 on one
> machine, 2.2.12 on the other) both choke on boot with Test Unit Ready
                                                        ^^^^^^^^^^^^^^^
Does your Adaptec controller have a BIOS configuration screen? If
so, see what the sync rate is. It is possible that the new drive
has negotiated with a sync-rate it can't possibly handle. Manually
set it to the next lower and try again.

Also, make sure the ends (both ends) of your SCSI cable are terminated.
The auto-term in the Adaptec controllers I have used is not sufficient
for fast drives. The fact that the BIOS can see a drive means nothing!

The drive name, etc., is handled via a slow-speed inquiry command.
You can see most drives when they are connected without any termination,
even with very long (too long) cables.

Cheers,
Dick Johnson

Penguin : Linux version 2.3.41 on an i686 machine (800.63 BogoMips).

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