Tom Jensen tom at
Sat Jan 31 17:38:55 PST 2004

Ok, well my ad0 is a Western digital HD but I have notice that its spin down
some times. The strange thing is that I did not see this message when I used
5.1-Current so that is what spooked me.

- Tom

-----Original Message-----
From: owner-freebsd-current at
[mailto:owner-freebsd-current at] On Behalf Of Dag-Erling Smørgrav
Sent: 1. februar 2004 02:01
To: Tom Jensen
Cc: freebsd-current at
Subject: Re: ad0: TIMEOUT

"Tom Jensen" <tom at> writes:
> I found this timeout in my dmesg log:
> ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=447
> ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=6718175
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=3045111
> ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=13869215
> Is this a bug?

Probably not.  Is ad0 by any chance an IBM DTTA or DTLA drive?  They have a
nasty habit of spinning down to recalibrate every 25 hours or so, and you'll
get timeouts while they're busy doing that.

Dag-Erling Smørgrav - des at
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