tail of two scsis

Richard Emberson remberson at edgedynamics.com
Mon Jun 14 14:57:47 UTC 2004


Jose Luis Ricardo Chavez wrote:
> Richard Emberson wrote:
> 
>> I've got a FC2 system and a scsi disk with /boot and /.
>> In addition, I have two other scsi disks with /home and /usr/local
>> on them (call the disks A and B). Both of these disks
>> have their IDs set to 6.
>> When I boot the system with disk A, disk A can be found and
>> the boot succeeds. When I replace disk A with disk B, disk B
>> can not be found and the boot fails.
>> Other than the possibility that disk B is bad, what else
>> could be the cause?
>>
>> The boot disk is a 7500rpm Quantum.
>> Disk A is a 10000rpm Maxtor.
>> Disk B is a 7500rpm Quantum.
>> Back in my RedHat 9 days, the system used both Quantum disks.
>>
>> Thanks
>>
>> Richard
>>
>>
> Are both disks using the same SCSI id while connected to the same cable
> (SCSI channel)? As far as I remember there is not a "cable select" option
> when using SCSI disks, both disks should use different id's. Put the lowest
> id on the boot disk (A). If the disks are connected to different SCSI 
> channels
> then maybe there is a problem with one of them.
> - Jose Luis
> 
> 
The boot disk is always on the cable. Only one of the disks A and B
are on the cable at one time.





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