I am trying to resize a logical volume on CentOS7 but am running into the following error:

    resize2fs 1.42.9 (28-Dec-2013)
    resize2fs: Bad magic number in super-block while trying to open /dev/mapper/centos-root
    Couldn&#39;t find valid filesystem superblock.

I have tried adding a new partition (using fdisk) and using vgextend to extend the volume group, then resizing.
Resize worked fine for the logical volume using lvextend, but it failed at resize2fs.

I have also tried deleting an existing partition (using fdisk) and recreating it with a larger end block, then resizing the physical volume using lvm pvresize, followed by a resize of the logical volume using lvm lvresize. Again everything worked fine up to this point.

Once I tried to use resize2fs, using both methods as above, I received the exact same error.



Hopefully some of the following will shed some light.


fdisk -l

    [root@server~]# fdisk -l

    Disk /dev/xvda: 32.2 GB, 32212254720 bytes, 62914560 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x0009323a

    Device Boot      Start         End      Blocks   Id  System
    /dev/xvda1   *        2048     1026047      512000   83  Linux
    /dev/xvda2         1026048    41943039    20458496   8e  Linux LVM
    /dev/xvda3        41943040    62914559    10485760   8e  Linux LVM

    Disk /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes


    Disk /dev/mapper/centos-root: 29.5 GB, 29532094464 bytes, 57679872 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes


pvdisplay

    [root@server ~]# pvdisplay
    --- Physical volume ---
    PV Name               /dev/xvda2
    VG Name               centos
    PV Size               19.51 GiB / not usable 2.00 MiB
    Allocatable           yes (but full)
    PE Size               4.00 MiB
    Total PE              4994
    Free PE               0
    Allocated PE          4994
    PV UUID               7bJOPh-OUK0-dGAs-2yqL-CAsV-TZeL-HfYzCt

    --- Physical volume ---
    PV Name               /dev/xvda3
    VG Name               centos
    PV Size               10.00 GiB / not usable 4.00 MiB
    Allocatable           yes (but full)
    PE Size               4.00 MiB
    Total PE              2559
    Free PE               0
    Allocated PE          2559
    PV UUID               p0IClg-5mrh-5WlL-eJ1v-t6Tm-flVJ-gsJOK6

vgdisplay

    [root@server ~]# vgdisplay
    --- Volume group ---
    VG Name               centos
    System ID
    Format                lvm2
    Metadata Areas        2
    Metadata Sequence No  6
    VG Access             read/write
    VG Status             resizable
    MAX LV                0
    Cur LV                2
    Open LV               2
    Max PV                0
    Cur PV                2
    Act PV                2
    VG Size               29.50 GiB
    PE Size               4.00 MiB
    Total PE              7553
    Alloc PE / Size       7553 / 29.50 GiB
    Free  PE / Size       0 / 0
    VG UUID               FD7k1M-koJt-2veW-sizL-Srsq-Y6zt-GcCfz6


lvdisplay

    [root@server ~]# lvdisplay
    --- Logical volume ---
    LV Path                /dev/centos/swap
    LV Name                swap
    VG Name                centos
    LV UUID                KyokrR-NGsp-6jVA-P92S-QE3X-hvdp-WAeACd
    LV Write Access        read/write
    LV Creation host, time localhost, 2014-10-09 08:28:42 +0100
    LV Status              available
    # open                 2
    LV Size                2.00 GiB
    Current LE             512
    Segments               1
    Allocation             inherit
    Read ahead sectors     auto
    - currently set to     8192
    Block device           253:0

    --- Logical volume ---
    LV Path                /dev/centos/root
    LV Name                root
    VG Name                centos
    LV UUID                ugCOcT-sTDK-M8EV-3InM-hjIg-2nwS-KeAOnq
    LV Write Access        read/write
    LV Creation host, time localhost, 2014-10-09 08:28:42 +0100
    LV Status              available
    # open                 1
    LV Size                27.50 GiB
    Current LE             7041
    Segments               2
    Allocation             inherit
    Read ahead sectors     auto
    - currently set to     8192
    Block device           253:1



I&#39;ve probably done something stupid, so any help would be greatly appreciated!

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resize2fs: Bad magic number in super-block while trying to open