lvm2-2.02.13-10 (Logical Volume Manager)

30/Jan/2007 tested on openSUSE 10.2

LVM Words

  • PV(Physical Volume)

    • A phicical volume is a hard disk (i.e. /dev/hda7, /dev/hdc), though it might be a device that look like a hard disk (i.e. raid device).

  • VG(Volume Group)

    • The Volume Group gathers together a collection of Logical Volumes and Physical Volumes into one administrative unit.

  • LV(Logical Volume)

    • The equivalent of a disk partition in a non-LVM system. The LV is visible as a standard block device, as the LV can contain a file system.

    Configuration

  • Using openSUSE, you can configure YaST. Open [System]->[LVM]. This screen shows there are three PVs (Physical Volume), but /dev/hda1 is allocated for Linux Native for /boot. All PV are already used by VG, but only 41.9G are used, and 107.0GB are not allocated.

  • Select [/] LV and click [Edit] to change the configuration of this LV.

  • Click [Fstab Options] to see the options.

  • You might change the size of the LV. ext3 file system support decreasing, and increasing the size.

  • But you need to unmount the filesystem before resizing.

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