Greg Freemyer wrote:
>> I will try to use another test disk. Right now we use different models
>> of Western Digital "RAID edition".
>>
> 
> iiuc, raid editions are designed to fail fast thus allowing an
> alternate drive to provide the data rather than having to wait thru
> multiple internal retries.
> 
> Could this just be a case of the drive functioning as designed?

If that's the case, the drive should be aborting commands with ICRC bit
set reporting unrecoverable media error (AC_ERR_DEV | AC_ERR_MEDIA in
libata terms) but the errors are fatal interface errors and timeouts,
both of which are indicative of transmission problems on ATA link.

-- 
tejun
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