On Wed, Mar 28, 2001 at 12:52:48AM -0800, Todd Whitesel wrote:
> 
> Mar 28 00:38:42 kei /netbsd: pciide0:0:0: lost interrupt
> Mar 28 00:38:42 kei /netbsd:    type: ata tc_bcount: 8192 tc_skip: 0
> Mar 28 00:38:42 kei /netbsd: wd0e: device timeout reading fsbn 6491088 of 6491088-6491103 (wd0 bn 8588736; cn 8520 tn 9 sn 9), retrying
> Mar 28 00:38:42 kei /netbsd: wd0: soft error (corrected)
...
> I've been running 1.5 for a few days now after trying 1.5S on it, and both
> of those manage to keep using UDMA in spite of the occasional lost interrupt
> sequence like the above. When it happens, the machine goes away for a few
> seconds and I can hear the HD making a distinctly unusual noise.

That's generally the drive recalibrating and trying to read the sector
over and over -- meaning your disk has developed a defect.  Given that
you ca get 40GB for about $0.02 these days (okay, I'm exaggertaing, but
only a little), I suggest you replace it.