What does 'pvscan; vgscan; lvscan' show? If the LVs show 'inactive', try
'lvchange -ay <lv_path>', then 'lvscan' should show the LV as 'ACTIVE'.
If so, try mounting the LV.
On 11/01/14 11:28 PM, Tom+Dale wrote:
I am hoping that someone can assist me with a problem that I have on a
single 500GB drive that was partitioned by "Mythdora" a (now defunct)
distribution of Fedora + MythTV. I had this system in use for several
years and recently the motherboard died. When I put the hard disk into a different machine it would not boot up (no surprise); however, I also
was unable to access the partitions from a Knoppix Live CD (I tried both 5.1 and 7.0). When I tried with Knoppix to mount the partitions I
discovered that something is wrong with the partition tables or logical
volumes. Here are some examples of the commands that I tried along with the results. Will you please give me some advice about the best way to recover data from sda2 (the recordings)? Thank you in advance!
-Tom
---------------------------------------------
root@Microknoppix:/# fdisk -l
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 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: 0x000537fa
Device Boot Start End Blocks Id System
/dev/sda1 * 63 409662 204800 83 Linux
Partition 1 does not start on physical sector boundary.
/dev/sda2 409663 976768064
488179201 8e Linux LVM
Partition 2 does not start on physical sector boundary.
root@Microknoppix:/# parted -l
Model: ATA WDC WD5000AADS-1 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Number Start End Size Type File system Flags
1 32.3kB 210MB 210MB primary ext4 boot
2 210MB 500GB 500GB primary lvm
Warning: Unable to open /dev/fd0 read-write (Read-only file system). /dev/fd0
has been opened read-only.
Error: /dev/fd0: unrecognised disk
label
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0
has been opened read-only.
Error: /dev/sr0: unrecognised disk label
Error: /dev/zram0: unrecognised disk label
Warning: Unable to open /dev/cloop0 read-write (Read-only file system).
/dev/cloop0 has been opened read-only.
Error: /dev/cloop0: unrecognised disk
label
root@Microknoppix:/# gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.8.5
Partition table scan:
MBR: MBR only
BSD: not present
APM: not present
GPT: not present
***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format.
***************************************************************
Disk /dev/sda: 976773168 sectors, 465.8 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): E9B4E83E-86F3-4843-801E-495E6864F682
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 976773134
Partitions will be aligned on 8-sector boundaries
Total free space is 5099 sectors (2.5
MiB)
Number Start (sector) End (sector) Size Code Name
1 63 409662 200.0 MiB 8300 Linux filesystem
2 409663 976768064 465.6 GiB 8E00 Linux LVM
root@Microknoppix:/# vgchange -ay
/dev/sda2: read failed after 0 of 1024 at 0: Input/output error
/dev/sda2: read failed after 0 of 1024 at 4096: Input/output error
/dev/sda2: read failed after 0 of 2048 at 0: Input/output error
No volume groups found
root@Microknoppix:/# lvscan
/dev/sda2: read failed after 0 of 1024 at 0: Input/output error
/dev/sda2: read
failed after 0 of 1024 at 4096: Input/output error
/dev/sda2: read failed after 0 of 2048 at 0: Input/output error
No volume groups found
root@Microknoppix:/# lvm lvdisplay
/dev/sda2: read failed after 0 of 1024 at 0: Input/output error
/dev/sda2: read failed after 0 of 1024 at 4096: Input/output error
/dev/sda2: read failed after 0 of 2048 at 0: Input/output error
No volume groups found
root@Microknoppix:/# vgscan --mknodes
Reading all physical volumes. This may take a while...
/dev/sda2: read failed after 0 of 1024 at 0: Input/output error
/dev/sda2: read failed after 0 of 1024 at 4096: Input/output error
/dev/sda2: read failed after 0 of 2048 at 0: Input/output error
No volume groups found
No volume groups found
root@Microknoppix:/#
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