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Date: Sat, 04 Dec 2010 14:19:59 -0500
From: Mike Tancsa <mike@sentex.net>
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Cc: FreeBSD Questions <freebsd-questions@freebsd.org>
Subject: Re: massive hdd/geli problems after upgrade to 8.1-RELEASE
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On 12/4/2010 12:08 PM, Michael Schaefer wrote:
> 
> ad4: FAILURE - READ_MUL48 status=51<READY,DSC,ERROR> error=84<ICRC,ABORTED>
> LBA=594632984

Those do seem like hardware errors on the disk. But going back to the
old kernel however should not make a difference.  Try
(/usr/ports/sysutiles/smartmontools and do a
smartctl -x /dev/ad4
and see if the drive thinks it has any errors.  Does
atacontrol cap ad4
show any differences between the two kernels ?

perhaps something new is enabled or disabled between versions like the
power management ?

	---Mike