Kernel Panic Error: mount according to mtab /dev/mapper/VolGroup-lv_root is already mounted or /sysroot is busy
 

Hi Folks, Need your help/advise.

I have a hp server on which i installed centos6.5, which would not boot. During boot process, the Kernel panics with the following error :

Kernel Panic Error: mount according to mtab /dev/mapper/VolGroup-lv_root is already mounted or /sysroot is busy.

The issue started that when i realised few days ago that disks are raided as raid 0 rather than raid 1 (as per my system requirement). I deleted the array, created new raid 1 array. After that i installed the centos 6.5 on it again.

Now it will not boot up. I logged into rescue mode and following is the error screen shot :
mount: according to mtab, /dev/mapper/VolGroup-lv_root is already mounted on /sysroot
mount: /dev/mapper/VolGroup-lv_root already mounted or /sysroot busy

kernel panic - not syncing: Attempted to kill init!
Pid: 1, comm: init Tainted: G w ------ 2.6.32-431.17.1.e16.59847VAN.x86_64 #1
Call Trace:
[<ffffffff815524dc>] ? panic+0xa7/0x16f

Following is df -h:

df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-lv_root 50G 6.7G 41G 15% /
/dev/sdb2 485M 75M 385M 17% /boot
tmpfs 32G 0 32G 0% /dev/shm
/dev/mapper/VolGroup00-lv_home 332G 195M 315G 1% /home


Following is the grub.conf :
# kernel /vmlinuz-version ro root=/dev/mapper/VolGroup-lv_root
# initrd /initrd-[generic-]version.img
#boot=/dev/sdb
default=0
timeout=5
splashimage=(hd0,1)/grub/splash.xpm.gz
hiddenmenu
title VOS (2.6.32-431.17.1.e16.59847VAN.x86_64)
root (hd0,1)
Kernel /vmlinuz-2.6.32-431.17.1.e16.59847VAN.x86_64 ro root=/dev/mapper/VolGroup-lv_root rd_NO_LUKS crashkernel=128M quiet nomodeset pcie_aspm=off LANG=en_US.UTF-8 rd_NO_MD KEYTABLE=us rd_LVM_LV=VolGroup/lv_swap SYSFONT=latarcyrheb-sun16 rd_LVM_LV=VolGroup/lv_root rd_LVM_LV=VolGroup00/lv_swap rd_NO_DM rhgb quiet
initrd /initramfs-2.6.32-431.17.1.e16.59847VAN.x86_64.img
title VOS-lt (3.0.76-1.59718VAN.e.16.x86_64 ro root=/dev/mapper/VolGroup-lv_root rd_NO_LUKS crashkernel=128M quiet nomodeset pcie_aspm=off LANG=en_US.UTF-8 rd_NO_MD KEYTABLE=us rd_LVM_LV=VolGroup/lv_swap SYSFONT=latarcyrheb-sun16 rd_LVM_LV=VolGroup/lv_root rd_LVM_LV=VolGroup00/lv_swap rd_NO_DM rhgb quiet
initrd /initramfs-3.0.76-1.59718VAN.e16.x86_64.img



Following is the FSTAB:
#
/dev/mapper/VolGroup00-lv_root / ext4 defaults 1 1
UUID=83a9bcc8-3dac-4a73-8e6f-bb3ba1c1225a /boot ext4 defaults 1 2
/dev/mapper/VolGroup00-lv_home /home ext4 defaults 1 2
/dev/mapper/VolGroup-lv_swap swap swap defaults 0 0
/dev/mapper/VolGroup00-lv_swap swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0




Following is the mtab:
/dev/mapper/VolGroup00-lv_root / ext4 rw 0 0
/dev/sdb2 /boot ext4 rw 0 0
devpts /dev/pts devpts rw 0 0
tmpfs /dev/shm tmpfs rw 0 0
/dev/mapper/VolGroup00-lv_home /home ext4 rw 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw 0 0



Following is blkid:

/dev/sdb1: UUID="72cfa170-a09d-457e-8726-e8b2d2100a0d" TYPE="ext4"
/dev/sdb2: UUID="83a9bcc8-3dac-4a73-8e6f-bb3ba1c1225a" TYPE="ext4"
/dev/loop0: TYPE="squashfs"
/dev/sdb3: UUID="rF4tog-fk4B-aGgz-TFnm-Jb7N-ZwzW-XXPXtr" TYPE="LVM2_member"
/dev/sdb5: UUID="M4ZC2W-afpL-1cUq-uZIb-3V43-DXXX-brk35I" TYPE="LVM2_member"
/dev/mapper/VolGroup-lv_root: UUID="38bfbc5c-7602-471b-8259-77d1087de0fd" TYPE="ext4"
/dev/mapper/VolGroup00-lv_home: UUID="c3b80ff5-de03-4f33-8dbd-af75848555c8" TYPE="ext4"
/dev/mapper/VolGroup-lv_swap: UUID="1411290f-c992-4da4-929-1eead41b69c8" TYPE="swap"
/dev/mapper/VolGroup-lv_swap: UUID="29f1750c-a20f-4981-a35b-c6a54b55fd92" TYPE="swap"


Any help is appreciated.

Best Regards