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How to mount an LVM2 volume in Fedora Linux.

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Runnning old "Fedora 20-x86_64", and want to install Fedora-Kde-live-25-1-3.

Situation:
$ uname -rov
3.19.8-100.fc20.x86_64 #1 SMP Tue May 12 17:08:50 UTC 2015 GNU/Linux

$ sudo lvmdiskscan
/dev/fedora/root [ 50,00 GiB]
/dev/fedora/swap [ 3,77 GiB]
/dev/sda2 [ 500,00 MiB]
/dev/vg_maq01/lv_swap [ 5,75 GiB]
/dev/sda3 [ 118,75 GiB] LVM physical volume
/dev/vg_maq01/lv_home [ 63,00 GiB]
/dev/vg_maq01/lv_root [ 50,00 GiB]
/dev/fedora/home [ 48,48 GiB]
/dev/sdb2 [ 500,00 MiB]
/dev/sdb3 [ 194,87 GiB]
/dev/sdb4 [ 500,00 MiB]
/dev/sdb5 [ 102,24 GiB] LVM physical volume
6 disks
4 partitions
0 LVM physical volume whole disks
2 LVM physical volumes

The /dev/sda* is a SSD(KINGSTON SV200S3128G) 128GB, with old "Fedora 16-x86_64", and only want to recover some files in /home.

The /dev/sdb* is a Seagate(ST3320613AS) 320GB, running old "Fedora 20-x86_64", with some important file in /home.

$ sudo lvscan
ACTIVE '/dev/fedora/swap' [3,77 GiB] inherit
ACTIVE '/dev/fedora/home' [48,48 GiB] inherit
ACTIVE '/dev/fedora/root' [50,00 GiB] inherit
ACTIVE '/dev/vg_maq01/lv_swap' [5,75 GiB] inherit
ACTIVE '/dev/vg_maq01/lv_home' [63,00 GiB] inherit
ACTIVE '/dev/vg_maq01/lv_root' [50,00 GiB] inherit

$ mount | grep /dev/mapper
/dev/mapper/fedora-root on / type ext4 (rw,relatime,seclabel,data=ordered)
/dev/mapper/fedora-home on /home type ext4
(rw,relatime,seclabel,data=ordered)

Problem:
Want to mount the SSD on "Fedora 20" to recover some files, copying it to /dev/sdb3 space(/dev/sdb3 not used/mounted). After this, I can erase all SSD and install "Fedora 25" on it.

Thanks for help.

posted May 21, 2017 by anonymous

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Wouldnt it be /dev/vg_maq01/lv_home that you want to mount to read files out of your home directory?

1 Answer

0 votes

Caveat: I don't use VG or LV, so not familiar with its usage.

Can you look at the /etc/fstab on the drive you want to copy files from? Create some mount points under /mnt in F20, add the lines from the F16 /etc/fstab to the F20 /etc/fstab, mounting under your new mount points. Reboot, and those mount points should be active, allowing you to cp from them. When you are done, just delete the lines in fstab.

e.g. instead of mounting /home of F16 under /home, mount it under /mnt/f16_home in F20, but with the same parameters as it was
mounted with in the /etc/fstab under F16.

answer May 22, 2017 by Majula Joshi
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