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From: Richard Tobin <richard@inf.ed.ac.uk>
To: freebsd-questions@freebsd.org
Organization: just say no
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Date: Wed,  5 Sep 2007 23:03:10 +0100 (BST)
Subject: Disk errors when copying
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When copy between disks (ad10 ->ad8), I get errors:

ad10: WARNING - READ_DMA48 UDMA ICRC error (retrying request) LBA=435128800
ad10: FAILURE - READ_DMA48 status=51<READY,DSC,ERROR> error=10<NID_NOT_FOUND> LBA=435128800
g_vfs_done():ad10s2g[READ(offset=175562145792, length=131072)]error = 5

I don't get these errors just reading the data from ad10.  Is this
some kind of system error rather than a bad disk?  Is it a known problem?

(6.2 stable, SATA disks)

-- Richard