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 Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    It shows LVM with and without RAID. :)

    What are the outputs of
    Code:
    fdisk -l
    ,
    Code:
    pvdisplay
    ,
    Code:
    vgdisplay
    , and
    Code:
    lvdisplay
    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 Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    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 Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    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 Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    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

    Thanks.

    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.
     

Share This Page