From owner-freebsd-questions@FreeBSD.ORG  Sat Jun 23 23:51:30 2007
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Date: Sat, 23 Jun 2007 19:51:25 -0400 (EDT)
From: Matt Juszczak <matt@atopia.net>
To: freebsd-questions@freebsd.org
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Subject: Issue with freebsd 6.2 and disk drives
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Hi all,

My dedicated server company is deploying me a new FreeBSD 6.2 server.  The 
box uses SATA drives, and is an AMD Athlon box.

I was getting the following error flooding my dmesg:

ad4: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=*********

so they replaced all the hardware in the box.  Still, with entirely 
different hardware, I am getting the same error:

ad4: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=106848207

The hard drive in the new box is:

ad4: 76319MB <Seagate ST3808110AS 3.AAD> at ata2-master SATA150

Before I start telling them that this new hardware is also bad, I figured 
I would see if there are any known problems/bugs with 6.2, or possibly a 
known compatibility issue with SATA (and maybe if I should ask them to 
switch to IDE).

Thanks all,

Matt