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From: mtang@insightbb.com
To: freebsd-questions@FreeBSD.org (FreeBSD Questions)
Date: Mon, 02 Jan 2006 23:15:08 +0000
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Subject: Disk error messages (ad0: HARD READ ERROR blk# xxxxxx)
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Hi there,

On my screen, there were messages like the followings comeing up. I have to 
reboot mutiple times to get it boot up normally. Does this mean I have to 
replace the disk which is a relatively new disk (1-2 years)? Any simple way to 
fix it and to avoid the time consuming task?


ad0: 39205MB <Maxtor 6EXXXXX> [79656/16/63] at ata0-master WDMA2
ad0: HARD READ ERROR blk# 131199
ad0: HARD READ ERROR blk# 131199 status=59 error=40
ad0: DMA problem fallback to PIO mode
ad0: HARD READ ERROR blk# 11272319 status=59 error=40
ad0: HARD READ ERROR blk# 11272319 status=59 error=40
ad0: HARD READ ERROR blk# 11272319 status=59 error=40
ad0: HARD READ ERROR blk# 131199 status=59 error=40
ad0: HARD READ ERROR blk# 3473535 status=59 error=40
ad0: HARD READ ERROR blk# 9240703 status=59 error=40
ad0: HARD READ ERROR blk# 17367167 status=59 error=40
ad0: HARD READ ERROR blk# 17760383 status=59 error=40