Hi all,
After rebooting my CentOS 5.5 server, i have the following message:
==================================
Red Hat nash version 5.1.19.6 starting
EXT3-fs: unable to read superblock
mount: error mounting /dev/root on /sysroot as ext3: invalid argument
setuproot: moving /root failed: No such file or directory
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
switchroot: mount failed: no such file or directory
Kernel panic - not syncing: Attempted to kill init!
I booted the server (rescue mode) with CentOS 5.4 x64 i have used to
initially install it. It recognizes all the RAID1 partitions i have.
cat /mnt/sysimage/proc/mdstat
============================
md3 : active raid1 sdb2[1] sda2[0]
2048192 blocks [2/2] [UU]
md1 : active raid1 sdb3[1] sda3[0]
486134848 blocks [2/2] [UU]
md0 : active raid1 sdb1[0] sda1[1]
200704 blocks [2/2] [UU]
unused devices: <none>
cat /mnt/sysimage/boot/grub/menu.lst
===================================
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/md1
# initrd /initrd-version.img
#boot=/dev/md0
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-164.10.1.el5xen)
root (hd0,0)
kernel /xen.gz-2.6.18-164.10.1.el5
module /vmlinuz-2.6.18-164.10.1.el5xen ro root=/dev/md1 rhgb quiet
module /initrd-2.6.18-164.10.1.el5xen.img
title CentOS (2.6.18-164.10.1.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-164.10.1.el5 ro root=/dev/md1 rhgb quiet
initrd /initrd-2.6.18-164.10.1.el5.img
title CentOS (2.6.18-164.6.1.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-164.6.1.el5 ro root=/dev/md1 rhgb quiet
initrd /initrd-2.6.18-164.6.1.el5.img
title CentOS (2.6.18-164.6.1.el5xen)
root (hd0,0)
kernel /xen.gz-2.6.18-164.6.1.el5
module /vmlinuz-2.6.18-164.6.1.el5xen ro root=/dev/md1 rhgb quiet
module /initrd-2.6.18-164.6.1.el5xen.img
title CentOS (2.6.18-164.el5xen)
root (hd0,0)
kernel /xen.gz-2.6.18-164.el5
module /vmlinuz-2.6.18-164.el5xen ro root=/dev/md1 rhgb quiet
module /initrd-2.6.18-164.el5xen.img
title CentOS-base (2.6.18-164.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-164.el5 ro root=/dev/md1 rhgb quiet
initrd /initrd-2.6.18-164.el5.img
./getinfo.sh disk
==============
== BEGIN uname -rmi ==
2.6.18-164.el5 x86_64 x86_64
== END uname -rmi ==
== BEGIN rpm -q centos-release ==
centos-release-5-5.el5.centos
== END rpm -q centos-release ==
== BEGIN getenforce ==
Permissive
== END getenforce ==
== BEGIN cat /etc/fstab ==
/dev/md1 / ext3 defaults,acl 1 1
/dev/md0 /boot ext3 defaults 1 2
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
/dev/md3 swap swap defaults 0 0
== END cat /etc/fstab ==
== BEGIN df -h ==
Filesystem Size Used Avail Use% Mounted on
/dev/md1 450G 72G 355G 17% /
/dev/md0 190M 45M 136M 25% /boot
== END df -h ==
== BEGIN fdisk -l ==
Disk /dev/md0 doesn't contain a valid partition table
Disk /dev/md1 doesn't contain a valid partition table
Disk /dev/md3 doesn't contain a valid partition table
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 25 200781 fd Linux raid
autodetect
/dev/sda2 26 280 2048287+ fd Linux raid
autodetect
/dev/sda3 281 60801 486134932+ fd Linux raid
autodetect
Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 25 200781 fd Linux raid
autodetect
/dev/sdb2 26 280 2048287+ fd Linux raid
autodetect
/dev/sdb3 281 60801 486134932+ fd Linux raid
autodetect
Disk /dev/md0: 205 MB, 205520896 bytes
2 heads, 4 sectors/track, 50176 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/md1: 497.8 GB, 497802084352 bytes
2 heads, 4 sectors/track, 121533712 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/md3: 2097 MB, 2097348608 bytes
2 heads, 4 sectors/track, 512048 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
== END fdisk -l ==
== BEGIN blkid ==
/dev/md3: TYPE="swap"
/dev/md0: UUID="085a2fe2-a28b-4c82-aae8-d4711a73f824" TYPE="ext3"
/dev/md1: UUID="4e26e66d-b4f3-45e3-8307-e13358b13610" TYPE="ext3"
/dev/sdb3: UUID="4e26e66d-b4f3-45e3-8307-e13358b13610" TYPE="ext3"
/dev/sdb2: TYPE="swap"
/dev/sdb1: UUID="085a2fe2-a28b-4c82-aae8-d4711a73f824" TYPE="ext3"
/dev/sda3: UUID="4e26e66d-b4f3-45e3-8307-e13358b13610" TYPE="ext3"
/dev/sda2: TYPE="swap"
/dev/sda1: UUID="085a2fe2-a28b-4c82-aae8-d4711a73f824" TYPE="ext3"
== END blkid ==
Tried to boot from different kernels, same result. I searched Google
and read something about superblock being "repeted" to many places on
the filesystem but didn't tried anything because of bad explanations and
fear of srewing up the partition.
I already backed up the important stuff to another server. I'd like to
know if it's possible to fix that problem quickly, if not i'll
re-install it. But i'd like to know the fix anyway so if it appends
again, would know what to do!
Thanks!
Guy Boisvert
IngTegration inc.
--
Guy Boisvert, ing.
IngTegration inc.
http://www.ingtegration.com
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