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Thread: Need help finishing an LVM resize operation

  1. #1
    Join Date
    Oct 2009
    A place with no mountains

    Arrow Need help finishing an LVM resize operation

    I have already resized the file system and the logical volumes. Now I have free PEs in the VG. What are the next steps to reduce the volume group?

    My setup is 1 HDD with 2 partitions:
    sda1 (/boot)
    sda2 (LVM inside crypto)

    There is only 1 volume group (and it doesn't span any partitions/HDDs - it simply holds 3 LVs).
    Inside the VG are these logical volumes
    These now take up on 16.92 GB.

    I want to shrink the VG from 109.42 GB to 20 GB.
    Then I want to shrink sda2 down from 109 GB to 20 GB -- and keep the crypto and VG.

    Here's some relevant info:

    Disk /dev/sda: 120.0 GB, 120034123776 bytes
    255 heads, 63 sectors/track, 14593 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Disk identifier: 0xxxxx

    Device Boot Start End Blocks Id System
    /dev/sda1 * 1 309 2474010 83 Linux
    Partition 1 does not end on cylinder boundary.
    /dev/sda2 310 14593 114736230 8e Linux LVM

    # vgdisplay
    --- Volume group ---
    VG Name VgOne
    System ID
    Format lvm2
    Metadata Areas 1
    Metadata Sequence No 6
    VG Access read/write
    VG Status resizable
    MAX LV 0
    Cur LV 3
    Open LV 0
    Max PV 0
    Cur PV 1
    Act PV 1
    VG Size 109.42 GB
    PE Size 4.00 MB
    Total PE 28011
    Alloc PE / Size 4331 / 16.92 GB
    Free PE / Size 23680 / 92.50 GB
    VG UUID xxxxx

    Basically, I want to use the free space to make a new partition, sda3 (outside this VG, of course). Thanks.

  2. #2

    Post Re: Need help finishing an LVM resize operation

    I'm sure you have already solved this by now, but for those that may find this later, a good tool to use (from a LiveCD) to tackle resizinvg LVMs is evms. I wrote a guide covering how to use it which can be found at Resizing Default LVM Partitions and Moving /boot - Mine the Harvest


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