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The disk on my Fedora 12 box was starting to fail, so I bought a new disk and installed Fedora 15. I kept the old disk connected, which still sort of works, hoping to copy over some important files.

In Fedora 15, the "Disk Utility" application lets me mount the /boot partition, but not the other volume on the old disk. "Disk Utility" shows the existence of that volume, but doesn't offer a way to mount it.

Here's what it says in the old /etc/fstab for the old root and /boot:

/dev/mapper/vg_flotsam-lv_root / ext4 defaults 1 1 UUID=f88eefec-a42f-4797-b704-bb1a426b8874 /boot ext4 defaults 1 2

How can I mount the old volume?

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This is complicated slightly (and on the other hand, made easier :) ) by the fact that you appear to be using LVM. Can you edit your post with the output of the following commands: pvscan, vgscan, and lvscan? –  Flimzy Jun 17 '11 at 7:06

2 Answers 2

As the root partition on the old disk is using LVM the first thing to do is to make sure that the system has found all the physical volumes by running pvscan as root - you shouldn't need to give it any arguments.

Then run vgscan as root, again with no arguments, and you should see the vg_flotsam volume group listed in the output.

Make sure the volume group is activated by running vgchange -a y vg_flotsam as root and you should find that the /dev/mapper/vg_flotsam-lv_root device will appear and you will then be able to mount it.

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The problem was that the logical volumes on both disks was the same. By renaming one of them, I was able to mount the volume on the old disk and copy the data.

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If you're the OP, you might want to log in as them and mark this answer as accepted. –  Michael Lowman Jun 20 '11 at 3:01

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