I'm getting this on a few different blocks:

wd1a: uncorrectable data error reading fsbn 2210784 of 2210784-2210797 (wd1 bn 2210784; cn 2193 tn 3 sn 51), retrying

I think I blew away the disklabel when I was stuffing around with the
miniroot (whoops) and thus lost the table of bad blocks :( .. how do I
mark them as bad again?

g.