fsck fails with "partition in use" error after partition umount'ed
I notice that /dev/sdb1, an ext4 partition on a USB drive has remounted
fsck from util-linux 2.25.2
e2fsck 1.42.12 (29-Aug-2014)
/dev/sdb1 is in use.
e2fsck: Cannot continue, aborting.
Is there a way that a volume can be in use without being
mounted? I don't have a desktop environment, so it's
only vanilla (sid) here.
I suppose I should investigate lsof. I also wonder,
if changes in udev could be involved.
The underlying issue is that the driver detects an I/O