[6329] in linux-scsi channel archive
Resolution: How do I fix an unreliable scsi Seagate HD and Adaptec SCSIcontroller?
daemon@ATHENA.MIT.EDU (robert.meier@fanucrobotics.com)
Wed Apr 14 16:20:45 1999
Date: Wed, 14 Apr 1999 08:06:54 -0400
From: robert.meier@fanucrobotics.com
To: linux-scsi@vger.rutgers.edu
Linuxers,
Thank you for your quick response and useful suggestions. Reducing
the SCSI bus speed from 80 MB/s to 53.4 MB/s seems to resolve the problem.
I will try to get a shorter cable and see if I can then raise the speed
back to the rated value of 80 MB/s.
> Problem:
> Failure rate during write: < 100 per 1 T bytes
> Failure rate during read: ~ 10,000 per 1 T bytes
>
>
> Configuration:
> 9G Hard Disk Ultra Wide SCSI 2
> Seagate Model: ST39173LW Rev: 6246
> Type: Direct-Access ANSI SCSI revision: 02
> (Temperature < 35 oC)
> Ultra Wide SCSI 2 Host Adapter
> Adaptec AHA2940
> Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI)
> 5.1.10/3.2.4
> => (Default settings)
Workaround:
Adaptec Firmware Setup: Set SCSI Options: ID 0 Speed: 53.4 MB/s
Result:
Failure rate during write: < 100 per 1 T bytes
Failure rate during read: < 10 per 1 T bytes
Thank you,
--
FANUC Robotics North America Dr. Robert J. Meier
1-248-377-7469
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