Chris, /ext2_saved and /ext4 are in / but only temporarily. I have "inlined" my responses prefixed with '#' below (is this ok to do?) George... On Sunday, February 21, 2021, 1:48:52 PM PST, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: On Sun, Feb 21, 2021 at 2:34 PM Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: > > On Sun, Feb 21, 2021 at 2:16 PM George R Goffe via test > <test@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > > fc35-bash 5.1 ~# mount -t ext4 -o loop,ro /ext2_saved/image /ext4 > > mount: /ext4: can't read superblock on /dev/loop0. > > Hmm. That's unexpected though. I'm going to try it in a VM. It should work. Works for me. But I'm confused by your paths, i.e. are you really creating /ext2_saved and /ext4 in the root directory? Assume root user: mount /dev/vdb /mnt/btrfs # on this system here vdb is sda8. /mnt/btrfs is /export/home mount -t ext4 -o ro,loop /mnt/btrfs/ext2_saved/image /mnt/ext4 # result is unchanged: mount -t ext4 -o ro,loop /export/home/ext2_saved/image /mnt/ext4 mount: /mnt/ext4: can't read superblock on /dev/loop0. That works for me. But you could alternatively try: mount /dev/vdb /mnt/btrfs losetup -r /dev/loop0 /mnt/btrfs/ext2_saved/image # losetup NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE DIO LOG-SEC /dev/loop0 0 0 0 1 /export/home/ext2_saved/image 0 512 blkid /dev/loop0 # this command responds with nothing # blkid --version responds with: blkid from util-linux 2.36.2 (libblkid 2.36.2, 12-Feb-2020) What file system does libblkid think it is? Could be ext2, ext3, or ext4, in which case mount -t ext4 exclusively mounts ext4 and will otherwise fail. # the file command responds with: # file /export/home/ext2_saved/image #/export/home/ext2_saved/image: ERROR: cannot read `/export/home/ext2_saved/image' (Input/output error) -- Chris Murphy _______________________________________________ test mailing list -- test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to test-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/test@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
