tail of two scsis

[Jose Luis Ricardo Chavez]

Richard Emberson wrote:

> 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.
>
>
Ok, you have three disks, the boot disk is permanently connected and you 
connect
disk A or B when needed. Is the SCSI BIOS detecting disk B?

 - Jose Luis