[linux-lvm] Cannot access logical volume (open count=1)
Bryn M. Reeves
bmr at redhat.com
Mon Feb 14 10:19:39 UTC 2011
On 02/10/2011 09:14 PM, Peter Flass wrote:
> I'm truly sorry to bother the developers' list with this question, but
> I've searched and can't find an ansewr that works. A system crash seems
> to have corrupted something in my fedora system. I boot to a rescue CD
> and look thru LVM. The disk (sdb) has one vg and three lv's on it.
> Call the vg vg_xxx, the lv's are lv_boot (ext3, I believe), lv_swap (no
> fs) and lv_home (ext4). I can't fsck (e2fsck) lv_home or do anything
> else with it, LVM says it's open count=1 where the open count of the
> other two lv's is zero.
> I can't find who has it open. /proc/mounts shows /dev/sdb1 mounted on
> /media/usb0, when I umount it (either by mount point or device) it
> disappears, but the lv still shows open, and as a result I am unable to
> do anything with it. lsof also shows nothing open that resembles this
> lv. I can inactivate the other two lvs in this vg, but not lv_home.
> What can I do to fix this problem?
What does "dmsetup ls --tree" look like?
$ sudo dmsetup ls --tree
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