[CentOS] Storage/SCSI Error on our CentOS server

[Vasiliy Boulytchev]

Agreed, I was thinking of cables as well.

See if you get better performance when you replace the cables :)

Good luck

John R Pierce wrote:
>
> Hairul Ikmal Mohamad Fuzi wrote:
>> Hi,
>>
>> Currently we are running CentOS 4.x on a 2-way Opteron machine.
>> This machine, through a SCSI host adapter (Adaptec), is connected to a
>> 2TB storage unit (an external RAID-5 disk array)
>>
>> Until our recent unintentional power trip, everything was fine and 
>> smooth.
>> We have been experiencing complication accessing the storage ( it
>> could be either intermittent filesystem error, partition could not be
>> mounted in read-write mode, unacceptable writing speed, etc ),
>> especially when we start to 'write' on the storage.
>>
>> After a few check, we are suspecting either :
>>
>> 1) the storage unit (but the storage control panel did not report any
>> disk/raidset failure) is failing or,
>> 2) the SCSI host adapter is failing, or
>> 3) the filesystem itself is corrupted (we did 'fsck.ext3 -v -f' but it
>> turned out it did not find any errors)
>
>
> or 4) scsi cabling.   I see some scsi transmission errors in there.   
> About the only way I know to diagnose something like this would be to 
> swap parts... I'd swap the controller card and see if the problems go 
> away, then try the cable, then try the storage controller.   if one of 
> these things fixes the problem back the other changes out (ie put the 
> original card back, etc).
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