Home > CentOS, Linux, RHEL, Storage > Add additional disk space to disk in CentOS or RHEL

Add additional disk space to disk in CentOS or RHEL

There are multiple steps required to get this done. Below is a simple basic guide with commands:

  • Download gparted.iso (link) and boot to gparted
  • Deactive the disk you want to resize
  • Resize the disk
  • Apply the changes to the disk
  • Reboot into CentOS or RHEL and run the commands:

    1. lvm vgdisplay

    [user@Server~]# lvm vgdisplay
    — Volume group —
    VG Name               VolGroup
    System ID
    Format                lvm2
    Metadata Areas        1
    Metadata Sequence No  4
    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               99.51 GiB
    PE Size               4.00 MiB
    Total PE              25474
    Alloc PE / Size       4994 / 19.51 GiB
    Free  PE / Size       20480 / 80.00 GiB
    VG UUID               iKGKSv-WEVw-0vNB-pRQO-8a5T-q4Z4-8knkhN

    2.  lvm vgdisplay (take a note of the volume you want to extend)

    [user@server~]# lvm lvdisplay
    — Logical volume —
    LV Path                /dev/VolGroup/lv_root
    LV Name                lv_root
    VG Name                VolGroup
    LV UUID                9nSUAm-9Krp-itTW-YuZc-XgtG-m8GS-5C4dLx
    LV Write Access        read/write
    LV Creation host, time ,
    LV Status              available
    # open                 1
    LV Size                95.60 GiB
    Current LE             24474
    Segments               2
    Allocation             inherit
    Read ahead sectors     auto
    – currently set to     256
    Block device           253:0

    3. Run lvextend -l +100%FREE /dev/VolGroup/lv_root

    Size of logical volume VolGroup/lv_root changed from 15.60 GiB (3994 extents) to 95.60 GiB (24474 extents).
    Logical volume lv_root successfully resized

    4. Run lvm vgdisplay to confirm the new disk size

    5. Run resize2fs -p /dev/VolGroup/lv_root (this will add the extra space to the volume)

    6. Run df -h to confirm that the new volume size has been applied

    [user@server log]# df -h
    Filesystem            Size  Used Avail Use% Mounted on
    94G   15G   75G  17% /
    tmpfs                 935M     0  935M   0% /dev/shm
    /dev/xvda1            477M   92M  360M  21% /boot

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