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Date:      Tue, 24 Jul 2012 11:40:14 -0500
From:      dweimer <dweimer@dweimer.net>
To:        FreeBSD Questions <freebsd-questions@freebsd.org>
Subject:   Disk Errors
Message-ID:  <d65bfc394e4b31d92bb6ab9e8d220d16@dweimer.net>

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Just curious, I am sure the likely issue is a bad disk, but I thought 
there might be a chance this could be caused by possibly by something 
else.

I have three 1TB disks I use for backup, two of them are Western 
Digital drives I bought specifically for this purpose.  One is a Seagate 
drive that came out of a barebones PC that I replaced with a couple 
smaller drives in a stripe to gain performance.  I use the drives in an 
external SATA dock, using geom eli encryption, the western digital 
drives give me no problems, but the seagate drive gives me a lot of the 
following errors under load.

ad4: TIMEOUT - WRITE_DMA48 retrying (1 retry left) LBA=817755328
ad4: WARNING - WRITE_DMA48 UDMA ICRC error (retrying request) 
LBA=837397120
ad4: TIMEOUT - WRITE_DMA48 retrying (1 retry left) LBA=879786112
ad4: WARNING - WRITE_DMA48 UDMA ICRC error (retrying request) 
LBA=882931200
ad4: WARNING - WRITE_DMA48 UDMA ICRC error (retrying request) 
LBA=890542016
ad4: WARNING - WRITE_DMA48 UDMA ICRC error (retrying request) 
LBA=902767296
ad4: TIMEOUT - WRITE_DMA48 retrying (1 retry left) LBA=904071296

dmesg info about the drive at connection time:
ad4: 953869MB <Seagate ST31000528AS CC46> at ata2-master UDMA100 SATA 
3Gb/s

dmesg info about one of the western digital drives:
ad4: 953869MB <WDC WD10EARS-00Y5B1 80.00A80> at ata2-master UDMA100 
SATA 3Gb/s

Before I scrap the drive I just wanted to see if anyone could either 
say for sure its hardware, or if something else could possibly cause 
this.  I don't suspect the controller, cable or dock as the problems 
would likely occur with the western Digital drives as well if one of 
them were involved.


-- 
Thanks,
    Dean E. Weimer
    http://www.dweimer.net/



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