A Beginner's Guide To LVM

Discussion in 'HOWTO-Related Questions' started by borgward, Jan 20, 2007.

  1. borgward

    borgward New Member

    I just looked at A Beginner's Guide To LVM. It seems to be oriented to setting up a raid configuration.

    I am looking for info about how to mount a slave HDD that has FC4 on a LVM partiton to either a master HDD that is partitioned with LVM running FC5, or a master HDD running FC5 that has been manually partitioned with out LVM. I want to move my HOME and other folders from the slave to the master HDD.
  2. falko

    falko Super Moderator

    It shows LVM with and without RAID. :)

    What are the outputs of
    fdisk -l
    , and
    when you plug in the slave HDD to the FC5 system?
  3. borgward

    borgward New Member

    Mount Slave FC4 LVM to FC5 Not LVM

    falko wrote:
    > fdisk -l
    Disk /dev/hda: 8622 MB, 8622931968 bytes
    255 heads, 63 sectors/track, 1048 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot start End Blocks ID System

    /dev/hda1 * 1 13 104391 83 Linux
    /dev/hda2 14 1048 8313637+ 8e LVM

    Disk /dev/hdb: 4311 MB, 4311982080 bytes
    255 heads, 63 sectors/track, 524 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot start End Blocks ID System

    /dev/hdb1 * 1 13 104391 83 Linux
    /dev/hdb2 14 268 2048287+ 83 Linux
    /dev/hdb3 269 333 5222112+ 83 Linux swap / Solaris
    /dev/hdb4 334 524 1534207+ 83 Linux

    NOTE: /dev/hda is jumpered as slave, /dev/hdb is jumpered as master. I thought that the master HDD would be hda. I reversed the hard drives in the IDE ribbon cable but got the same results.

    > pvdisplay
    --- Physical Volume ---
    PV Name /dev/hda2
    VG Nane VolGroup00
    PV Size 7.91 GB / not usable 0
    Allocatable Yes
    PE Size (KByte) 32768
    Total PE 253
    Free PE 1
    Allocated PE 252
    PV UUID 9KBo19-dJuk-dg1T-rN4Y-Rejv-eY8v-P8J7Bm

    > vgdisplay
    --- Volume Group ---
    VG Name Vol Group00
    System ID
    Format lvm2
    Metadata Areas 1
    Metadata Sequence No 3
    VG Access read/write
    VG Status resizable
    Max LV 0
    Cur LV 2
    Open LV 2
    Max PV 0
    Cur PV 1
    Act PV 1
    VG Size 7.91 GB
    PE Size 32.00 MB
    VG UUID QtwqLD-eDsV-p7fb-bHK7-ZdHP-xWZh-79IVM4

    > lvdisplay
    LV Name /dev/VolGroup00/LogVol01
    VG Name VolGroup00
    LVUUID Cf6PIT-MKo0-1uPr-isQx-eqW4-Kec1-XDdEbo
    LV Write Access read/write
    LV Status available
    # open 1
    LV Size 512.00 MB
    Current LE 16
    Segments 1
    Allocation inherit
    Read ahead sectors 0
    Block device 253:1
  4. falko

    falko Super Moderator

    And which hard disk contains Fedora Core 4? /dev/hda or /dev/hdb?
  5. borgward

    borgward New Member

    hda contains Fedora Core 4 (LVM)
  6. falko

    falko Super Moderator

    I'd create a new volume group and logical volume with /dev/hda2 and then mount it somewhere. Afterwards you can copy the files.
  7. borgward

    borgward New Member

    LVM to non LVM

    I do not want to use LVM on /dev/hdb (the master drive)

    Here is why:

    I installed FC5 on a new hard drive using the default LVM.

    I connected my old hard drive as slave. It had FC4 installed using the default LVM.

    I was never able to mount any thing from the old hard drive. I was never able to find anyone who knew how t do that.

    I was advised by many people who had lots of Linux experience to never use LVM, as I would have trouble transferring files from an old slave drive to a new install on a new master drive.

    I now have FC5 on the new hard drive (hdb)that does not use LVM, and want to move some of my files (home) from hda (slave) to hdb (master)

    I would also like to know how to do the same in the case that both the master and the slave use LVM.

    I was suprised that the slave came up as hda, and the master as hdb
  8. falko

    falko Super Moderator

    You don't need to use LVM on /dev/hdb. If you have a close look at my LVM tutorial, you'll realize that i don't use LVM on /dev/sda there, but still I can mount the logical volumes and use them on the system.
  9. borgward

    borgward New Member


    I will look at your guide again.

    I am still wondering why the master HDD (FC5 not LVM) comes up as hdb, and the slave HDD (FC4 LVM) comes up as hda. I would expect the master HDD to come up as hda.

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