Ubuntu
ubiquity package

  1. Bug #1155216
  2. Comment #11

Comment 11 for bug 1155216

Revision history for this message
Tony Cooper (aecooper) wrote : Re: Unable to umount isodevice

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.