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From: "Steven Hartland" <killing@multiplay.co.uk>
To: "Doug White" <dwhite@gumbysoft.com>
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Date: Fri, 16 Dec 2005 11:30:34 -0000
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Cc: freebsd-stable@freebsd.org
Subject: Re: Problems with ata RAID?
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----- Original Message ----- 
From: "Doug White" <dwhite@gumbysoft.com>

Would that also explain the errors on ad6 though? Seems quite strange to
be getting errors on 3 out of the 4 disks in the 0+1 array.

> I'd say ad4 went kaboom and is corrupting traffic on its bus, thus the ad5
> CRC warnings.  (Remember that Parallel ATA drives are master/slave.)
> 
>> ad4: timeout waiting to issue command
>> ad4: error issueing WRITE_DMA command
>> ar0: WARNING - mirror protection lost. RAID0+1 array in DEGRADED mode
>> ad4: timeout waiting to issue command
>> ad4: error issueing WRITE_DMA command
>> ad4: write metadata failed
>> ad6: req=0xc49b0578 WRITE_DMA semaphore timeout !! DANGER Will Robinson !!
>> ad5: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=2325663


    Steve


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