/dev/sde2 is the LVM partition I am interested in. Running mke2fs on /dev/VolGroup00/LogVol01 explicitly gives me the same thing.
Code:
$ sudo mke2fs -n /dev/VolGroup00/LogVol01
[sudo] password for ds229:
mke2fs 1.42.7 (21-Jan-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
38404096 inodes, 153600000 blocks
7680000 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
4688 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000
Both dumpe2fs commands are not able to read anything
Code:
$ sudo dumpe2fs /dev/dm-1 | grep -i superblock
dumpe2fs 1.42.7 (21-Jan-2013)
dumpe2fs: Attempt to read block from filesystem resulted in short read while trying to open /dev/dm-1
Couldn't find valid filesystem superblock.
$ sudo dumpe2fs /dev/mapper/VolGroup00-LogVol01 | grep -i superblock
dumpe2fs 1.42.7 (21-Jan-2013)
dumpe2fs: Attempt to read block from filesystem resulted in short read while trying to open /dev/mapper/VolGroup00-LogVol01
Couldn't find valid filesystem superblock.
And here is the output for lsblk and pvdisplay
Code:
$ sudo lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 596.2G 0 disk
├─sda1 8:1 0 196.1M 0 part
└─sda2 8:2 0 596G 0 part
sdb 8:16 0 931.5G 0 disk
├─sdb1 8:17 0 500M 0 part /boot
├─sdb2 8:18 0 742.2G 0 part /home
├─sdb3 8:19 0 58.6G 0 part /
├─sdb4 8:20 0 1K 0 part
├─sdb5 8:21 0 48.8G 0 part /usr/swr
├─sdb6 8:22 0 19.5G 0 part /var
├─sdb7 8:23 0 11.7G 0 part [SWAP]
└─sdb8 8:24 0 29.3G 0 part
sde 8:64 0 698.7G 0 disk
├─sde1 8:65 0 1G 0 part /run/media/marsluo/e08527a9-c875-4cc4-b83c-1158e07640c6
├─sde2 8:66 0 661.9G 0 part
├─sde3 8:67 0 16G 0 part
├─sde4 8:68 0 1K 0 part
└─sde5 8:69 0 10G 0 part /run/media/marsluo/9c758ac5-3a6d-4181-a401-9dce5175144c
sr0 11:0 1 1024M 0 rom
sr1 11:1 1 1024M 0 rom
$ sudo pvdisplay
--- Physical volume ---
PV Name /dev/sde2
VG Name VolGroup00
PV Size 661.87 GiB / not usable 27.00 MiB
Allocatable yes
PE Size 32.00 MiB
Total PE 21179
Free PE 554
Allocated PE 20625
PV UUID sqJHbZ-Udp4-OtHq-GQ38-Rkff-TSHQ-unS59g
FYI, the drive is currently sitting in a FC19 machine and was partitioned/written in a different Fedora box (18 or 19, I forget).
Here is a very interesting article on not only hiding data on filesystems (the article deals mainly with the ext2 filesystem, which should also work with etx3), but also recovering, including from slack space on raw blocks, and even deleted data!
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Here is somethin u might find interestin....
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Discussion started by: mackconsult
8 Replies
LEARN ABOUT PHP
pvck
PVCK(8) System Manager's Manual PVCK(8)NAME
pvck - check physical volume metadata
SYNOPSIS
pvck [-d|--debug] [-h|--help] [-v|--verbose] [--labelsector] PhysicalVolume [PhysicalVolume...]
DESCRIPTION
pvck checks physical volume LVM metadata for consistency.
OPTIONS
See lvm for common options.
--labelsector sector
By default, 4 sectors of PhysicalVolume are scanned for an LVM label, starting at sector 0. This parameter allows you to specify a
different starting sector for the scan and is useful for recovery situations. For example, suppose the partition table is corrupted
or lost on /dev/sda, but you suspect there was an LVM partition at approximately 100 MB. This area of the disk may be scanned by
using the --labelsector parameter with a value of 204800 (100 * 1024 * 1024 / 512 = 204800):
pvck --labelsector 204800 /dev/sda
Note that a script can be used with --labelsector to automate the process of finding LVM labels.
SEE ALSO lvm(8), pvcreate(8), pvscan(8)vgck(8)Sistina Software UK LVM TOOLS 2.02.95(2) (2012-03-06) PVCK(8)