On Wed, Feb 26, 2020 at 09:47 bch <brad.har...@gmail.com> wrote: > > Hello. > > I’m trying to make a copy of a disk I have before I newfs it to start from > a clean slate. > > The machine in question boots (but has an issue w /lost+found that fsck > cannot fix). The 1tb ssd is setup w 3 wedges: 1st for efi, 2nd for > NetBSD/ffs, 3rd for swap. > > I boot w a NetBSD 9 install iso (USB key), and I can mount the internal > disk /dev/dk1 and see the familiar contents. I have an external USB disk > that I’m using to store an image to. > > With the dk1 unmounted, I ran: > > # </dev/rdk1 progress -l 939413388k vndcompress -c -k 256 -l 939413388k > /dev/stdin /mnt/home/bch/myimg.imz > > ...which ran (for a long time) apparently without error. > > I associate the img w and vnd device: > # vndconfig -z vnd0 /mnt/home/bch/myimg.imz > > Then try mounting (vnd0a or vnd0d) and get “incorrect superblock” errors. > What am I doing incorrectly? disklabel reports ‘a’ as fstype 4.2BSD and ‘d’ > as unused, which is similar to what I read here: > http://netbsd.2816.n7.nabble.com/Using-cloop2-images-td66421.html#a66423 > > Help? >
Further: if I dd(1) a section of either vnd0a or d, the chunk reports as a DOS/MBR boot sector, which happily mounts with -tmsdos, yielding an empty mountpoint (eg: it mounts, but navigating there shows there are no contents). The compressed img I’ve got is 73G of what I thought was the NetBSD FFS wedge... >
