The continuing problems I'm having with my SATA drives seem to center on
only one of the two drives, /dev/ad10, and since both drives are
identical (Western Digital WD1200JD 120-GB SATA drives), this is a good
indicator that the drive itself might be failing. So I've decided to
spend $83 and buy a replacement drive to see if that fixes the problem.
Now, what's the easiest way to replace the drive? The drive I want to
replace contains only /var and /tmp. Are these mounted in single-user
mode? I was thinking perhaps I can just replace the drive, set up