I am booting my own casper based Ubuntu 18.04 LTS ISO image from a disk partition and also ran into this problem with toram apparently not working (well not completely at least).
The issue is the loopback devices are keeping the source disk active. Doing a forced umount doesn't help as the system still things the disk is mounted and won't let you fsck it. So I did losetup -a, located the offending device, in my case loop0 had /recovery mapped, and then I did losetup -d /dev/loop0 and it unmounted and I was able to fsck the underlying partition. HTH. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1155216 Title: Unable to umount isodevice To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1155216/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
