How to: mount Logical Volume Drive as External Device to Linux File System

First of all, we have to check if this hard disk is recognized by the system:

root@localhost ~]# fdisk -l

Let’s say your drive is assigned /dev/sdc. Then we scan for logical volumes so you’ll see something like this:

Disk /dev/sdc: 20.0 GB, 20020396032 bytes
255 heads, 63 sectors/track, 2434 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System
/dev/sdc1   *           1          13      104391   83  Linux
/dev/sdc2              14        1670    13309852+   f  W95 Ext’d (LBA)
/dev/sdc3            1671        2434     6136830   8e  Linux LVM
/dev/sdc5              14          75      497983+  82  Linux swap / Solaris
/dev/sdc6              76        1670    12811806   83  Linux

Next we scan for physical volumes:

root@localhost ~]# pvscan

You’ll get:

PV /dev/sdc3   VG VolGroup00   lvm2 [5.84 GB / 32.00 MB free]
Total: 1 [5.84 GB] / in use: 1 [5.84 GB] / in no VG: 0 [0   ]

Then scan for logical volumes:

root@localhost ~]# lvscan

You’ll get:

inactive            ‘/dev/VolGroup00/LogVol00′ [5.31 GB] inherit
inactive          ‘/dev/VolGroup00/LogVol01′ [512.00 MB] inherit

Logical volume that we want to access must be active, therefore we type in:

root@localhost ~]# /usr/sbin/lvchange -a y /dev/VolGroup00/LogVol00

Then mount to file system:

root@localhost ~]# mount -t ext3 /dev/VolGroup00/LogVol00 /mnt/

When done, unmount and revert to inactive mode:

root@localhost ~]# /usr/sbin/lvchange -a n /dev/VolGroup00/LogVol00

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