I am on a NetBSD 10 install now after sabotaging my fully good alpine due to constraints of sd card. The memory card from which I want to retrieve data is mounted at sd0
$ fsck_ffs /dev/sd0a /dev/rsd0a[1] Floating point exception (core dumped) fsck_ffs /dev/sd0a $ mount /dev/sd0a /mnt mount_ffs: /dev/sd0a on /mnt: incorrect super block I simply don't get this error. fsck on linux doesn't look like this, it corrects irrespectively. Kindly help. Thanking you Sagar Acharya https://humaaraartha.in 21 Jun 2023, 18:21 by m...@petermann-it.de: > Hi, > > On 21.06.23 14:20, Sagar Acharya wrote: > >> Also, linux doesn't have fsck_ffs and debian had support for ufs in ufsutils >> a long time ago. >> >> I highly recommend that for such cases you have a small standalone source >> which can be built for correcting such errors which can perhaps have >> disklabel, fsck_ffs, etc. A user can use it locally! >> Thanking you >> Sagar Acharya >> https://humaaraartha.in >> > > For serious repair attempts I would always use the USB installation media of > the appropriate NetBSD version as mentioned by Martin. This will first boot > into the installer (sysinst), but you can exit it via "Utilities menu" -> > "Run /bin/sh". Then you are in a shell and can access the whole toolbox to > analyze and clarify the situation. > > I would proceed like this (assumption: GPT partition layout): > > 1) gpt show <device name> > > ...to see if the partition table is still intact, if I got the right device > and which partitions are present. > > Example: gpt show wd0 > > 2) dkctl <device name> listwedges > > ...to list the wedges assigned to the partitions (system internal mapping of > parts of a logical disk) > > example: dkctl wd0 listwedges > > 3) fsck_ffs -f <wedge device node> > > ...forced fsck > > Example: fsck_ffs -f /dev/rdk3 > > > Kind regards > Matthias >
