Linux bad superblock on /dev/mapper/VolGroup-lv_root
Hi Friends . my linux try to start very slowly after give it this error:
Code:
mount: wrong fs type, bad option, bad superblock on /dev/mapper/VolGroup-lv_root,
missing codepage or helper program, or other error
in some cases useful info is found in syslog - try
dmesg : tail or so
Kernel panic - not syncing : Attempted to kill init!
Pid: 1, comm: init Not tainted 2.6.32-358.6.2.el6.x86_64 #1
Call Trace :
? panic+0xa7/0x16f
? do exit+0x862/0x870
? fput+0x25/0x30
? do_group_exit+0x58+0xd0
? sys_exit_group+0x17/0x20
? system_call_fastpath+0x16/0/0x1b
panic occurred, switching back to text console ( and computer froze on this screen )
and after i use it centos 6.4 setup cd and try to open with rescue mode its giving another error:
Code:
you don't have any linux partitions. press return to get a shell.
the system will reboot automatically when uou exit from the shell
its just 1 HDD : WD 1TB and no partition for data . i just installed it for the operating system. its a squid and dhcp server.
pls help me guys im stucked and idont know to much about linux. what can i do ? thanx
Code:
fdisk -l
Disk /dev/sda : 1000.2 GB, 1000204886016 bytes, 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size logical / physical = 512 bytes / 1096 bytes
I/O Size minimum optimal : 4096 bytes / 4096 bytes
Disk label type : dos
Disk identifer : 0x0bcea944
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 1953519615 976246784 8e Linux LVM
Disk /dev/mapper/live-rw : 2147MB
Disk /dev/mapper/live-base : 2147MB
Moderator's Comments:
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Last edited by Don Cragun; 10-24-2017 at 10:39 PM..
Reason: Add CODE tags.
So it's the partion 2, in Linux accessable as /dev/sda2,
but under lvm control, so you should try to repair it from a resuce system with lvm.
Stop the boot process with a few key strokes, so you get a grub menu that offers a rescue system.
If there is none, you can try to edit the normal linux system, and add rd.break to the kernel parameters, then continue the boot. It then spawns a rescue shell.
In the rescue system or in the rescue shell you must try to access the disk
The lsblk command should list a tree.
You can try to mount a part of it, probably /dev/mapper/VolGroup-lv_root,
(create an empty directory for example with mkdir -p /mnt)
so the command is
Code:
mount /dev/mapper/VolGroup-lv_root /mnt
If the mount fails with "bad superblock", then run fsck on it.
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