Tag Archives: Metadata Sequence No

Linux

Rename Root Logical Volume group?

Leave a comment

By moneynut

Hello,

I’m running Ubuntu 12.04. I need to rename my root logical volume group and it’s bootmanager/fstab accordingly.

Here is the output: I need to change the HP-TEST001 to PRODGROUP01. Please advice me.

root@PROD-02:/home# vgdisplay
— Volume group —
VG Name HP-TEST001
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
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 9.76 GiB
PE Size 4.00 MiB
Total PE 2498
Alloc PE / Size 2498 / 9.76 GiB
Free PE / Size 0 / 0
VG UUID vMIkzy-BCSa-bSHb-zt84-2xZ4-Xidm-zf46xB

root@PROD-02:/home# cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use ‘blkid’ to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
#
proc /proc proc nodev,noexec,nosuid 0 0
/dev/mapper/HP–TEST001-root / ext4 errors=remount-ro 0 1
# /boot was on /dev/sda1 during installation
UUID=29b6596c-j4r2-47db-9890-c654c9ca4c46 /boot ext2 defaults 0 2
/dev/mapper/HP–TEST001-swap_1 none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0

root@PROD-02:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/HP–TEST001-root 9.3G 1.5G 7.4G 17% /
udev 2.0G 4.0K 2.0G 1% /dev
tmpfs 791M 268K 791M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 2.0G 0 2.0G 0% /run/shm
/dev/sda1 228M 27M 189M 13% /boot

…read more

Source: FULL ARTICLE at The UNIX and Linux Forums

Linux

LVM recovery, Hard disk broken

Leave a comment

By pppplu

Hi
I am new on your forum, because I need some help.
I have a server with debian and proxmox 2.
The HardDisk is broken.

I am in rescue mode, and I can’t mount LVM partition to recover my backups.

What I’ve already done :

Code:
# fdisk -l
Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x000d6e00
Device Boot Start End Blocks Id System
/dev/sda1 * 4096 61442048 30718976+ 83 Linux
/dev/sda2 61442049 81920000 10238976 82 Linux swap / Solaris
Partition 2 does not start on physical sector boundary.
/dev/sda3 81920001 3907020800 1912550400 f W95 Ext'd (LBA)
Partition 3 does not start on physical sector boundary.
/dev/sda5 81920002 3907020800 1912550399+ 8e Linux LVM
Partition 5 does not start on physical sector boundary.

Code:
# vgscan
Reading all physical volumes. This may take a while...
/dev/pve/lv1: read failed after 0 of 4096 at 0: Input/output error
/dev/pve/lv1: read failed after 0 of 4096 at 4096: Input/output error
Found volume group "pve" using metadata type lvm2

Code:
~# vgscan
Reading all physical volumes. This may take a while...
/dev/pve/lv1: read failed after 0 of 4096 at 0: Input/output error
/dev/pve/lv1: read failed after 0 of 4096 at 4096: Input/output error
Found volume group "pve" using metadata type lvm2

Code:
mount /dev/pve/lv1 /mntlvm
mount: /dev/mapper/pve-lv1: can't read superblock

Code:
# vgdisplay
/dev/pve/lv1: read failed after 0 of 4096 at 0: Input/output error
/dev/pve/lv1: read failed after 0 of 4096 at 4096: Input/output error
--- Volume group ---
VG Name pve
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access

From: http://www.unix.com/filesystems-disks-memory/220873-lvm-recovery-hard-disk-broken.html