So, my 500G disk was having bad sectors near its end.
I had lvm on this, so I shrank the lvm pv (this worked),
put in my 750G disk, added it to the lvm vg njord,
ran pvmove from the dying disk to the living.
This seemed to work, but apparently I either vgreduced the wrong disk or the debian installer’s rescue mode did something weird.
Either way there was some data loss — luckily only some virtual machine images and maybe a few things in my ~/ that I hadn’t git-commit’d yet.
I’d like to point out that I haven’t formatted that disk in a LONG time.
Well, not that disk. I have been pvmoving that to and from various harddrives for the last 3 years or
so.
Maybe I should install gentoo?