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Date: Thu, 03 Nov 2005 13:46:12 -0600
From: Stephen Montgomery-Smith <stephen@math.missouri.edu>
Organization: University of Missouri
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Subject: DMA errors
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I found these messages on my computer, which is running a very recent 
RELENG_5.  Is this bad?  Does it indicate that the disk is failing?

Nov  3 07:35:48 cauchy kernel: ad4: FAILURE - READ_DMA
status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=145908831
Nov  3 07:35:51 cauchy kernel: ad4: FAILURE - READ_DMA
status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=145908863
Nov  3 07:35:55 cauchy kernel: ad4: FAILURE - READ_DMA
status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=145908895
Nov  3 07:35:59 cauchy kernel: ad4: FAILURE - READ_DMA
status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=145908895

-- 

Stephen Montgomery-Smith
stephen@math.missouri.edu
http://www.math.missouri.edu/~stephen