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Old 06-27-2007, 12:22 PM   #1
Registered: Sep 2004
Distribution: FC, ubuntu, OpenSuse
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mount: unknown filesystem type 'LVM2_member'

After recent upgrade Fedora 4 to Ubuntu 7 I have an issue mounting the old fedora drive. This system also has a 6 disk raid array. The Ubuntu install failed with the raid array so I had to unplug all drives but the ubuntu drive to perform the install. Now I plug back the fedora drive(and the raid) and want to mount but....

scan@terra:~$ sudo mount /dev/sdb2 /mount_hd/
mount: unknown filesystem type 'LVM2_member'

How can I mount this fedora 4 drive??
Old 06-27-2007, 01:20 PM   #2
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Mounting LVM volumes differs from mounting "normal" partitions. This page might have some help:

Basically a LVM group is inside one partition, and in that LVM group there are several volumes (root, boot, home etc. which would usually be on different partitions). There are good and bad sides in using LVM, I personally try to avoid using it anywhere just because it's easier to deal with normal partitions in problematic situations.
Old 06-27-2007, 02:19 PM   #3
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thanks. so it's helpful but I still am not sure what to do. pvs & lvdisplay are not working right because this install(ubuntu 7) didn't know abouth the old drive when it was installed. Not sure if it will matter but 1/2 of original LVM drives are gone because that hard drive died. Any idea how to get the lvm tools to recognize the old drive??
Old 02-28-2008, 06:20 AM   #4
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I was also very confused.
Fortunately I found this site via Google

How-to mount an LVM from Ubuntu
Old 07-23-2021, 06:02 PM   #5
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Exclamation's link

It looks like's link goes to a 404 now. Does anyone have updated links to the forum or documentation?

Thank you
Old 07-23-2021, 06:28 PM   #6
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Over 13 years since that post, not really surprising. Rather than necro-bump a dead thread, start your own thread with what problem you are facing, and what you want help with.
From a terminal run this for us, and post the output in your new thread.
lsblk -f


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