tail of two scsis

[Jose Luis Ricardo Chavez]

Richard Emberson wrote:

> Jose Luis Ricardo Chavez wrote:
>
>> 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?
>
>
> No.
> It detects disk A (disk B not connected) but not disk B (disk A not 
> connected).
> The boot disk in both cases is detected.
>
>>
>> - Jose Luis
>>
>>
>
>
Well, it seems disk B is damaged.

 - Jose Luis