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  #1  
Old 13th May 2009, 01:13
denali206 denali206 is offline
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Default LVM2 over RAID5 Recovery Help Needed

So I've been trying to recover my LVM2 over RAID 5 off and on for about a year now, yeah tell me about it! It seems when I decided to upgrade my Ubuntu distro, I didn't think to backup, of course, I completely lost my LVM2/RAID 5. I've tried many processes and software to recover but nothing has proved worthy. I landed on this great tutorial http://www.linuxjournal.com/article/8874 in hopes of recovery only to be stopped dead in my tracks, as it seems I no longer have an md RAID device (dev/md0). I followed this tut diligently and stopped at Listing 3. for obvious reasons. To sum it up, I'm hoping I can receive some direction as to how I may be able to recover my data with my particular situation.

The following is the output of the commands leading up to my dilemma as well as a few more that may help. Any help will be greatly appreciated. A huge thanks in advance!

Listing 1. LVM Disk Configuration

ubuntu@ubuntu:~$ sudo /sbin/sfdisk -l /dev/sdb

Disk /dev/sdb: 30401 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sdb1 0+ 30400 30401- 244196001 8e Linux LVM
/dev/sdb2 0 - 0 0 0 Empty
/dev/sdb3 0 - 0 0 0 Empty
/dev/sdb4 0 - 0 0 0 Empty
ubuntu@ubuntu:~$ sudo /sbin/pvscan
PV /dev/sdb1 VG fileserver lvm2 [232.88 GB / 61.53 GB free]
PV /dev/sdc1 VG fileserver lvm2 [232.88 GB / 172.88 GB free]
PV /dev/sdd1 VG fileserver lvm2 [232.88 GB / 0 free]
PV /dev/sde1 VG fileserver lvm2 [232.88 GB / 0 free]
PV /dev/sdf1 VG fileserver lvm2 [232.88 GB / 0 free]
Total: 5 [1.14 TB] / in use: 5 [1.14 TB] / in no VG: 0 [0 ]
ubuntu@ubuntu:~$ sudo lvscan
inactive '/dev/fileserver/share' [40.00 GB] inherit
inactive '/dev/fileserver/backup' [60.00 GB] inherit
inactive '/dev/fileserver/media' [830.00 GB] inherit

Listing 2. RAID Disk Configuration

ubuntu@ubuntu:~$ sudo /sbin/sfdisk -l /dev/sdb

Disk /dev/sdb: 30401 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sdb1 0+ 30400 30401- 244196001 8e Linux LVM
/dev/sdb2 0 - 0 0 0 Empty
/dev/sdb3 0 - 0 0 0 Empty
/dev/sdb4 0 - 0 0 0 Empty
ubuntu@ubuntu:~$ sudo /sbin/sfdisk -l /dev/sdc

Disk /dev/sdc: 30401 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sdc1 0+ 30400 30401- 244196001 8e Linux LVM
/dev/sdc2 0 - 0 0 0 Empty
/dev/sdc3 0 - 0 0 0 Empty
/dev/sdc4 0 - 0 0 0 Empty
ubuntu@ubuntu:~$ sudo /sbin/sfdisk -l /dev/sdd

Disk /dev/sdd: 30401 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sdd1 0+ 30400 30401- 244196001 8e Linux LVM
/dev/sdd2 0 - 0 0 0 Empty
/dev/sdd3 0 - 0 0 0 Empty
/dev/sdd4 0 - 0 0 0 Empty
ubuntu@ubuntu:~$ sudo /sbin/sfdisk -l /dev/sde

Disk /dev/sde: 30401 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sde1 0+ 30400 30401- 244196001 8e Linux LVM
/dev/sde2 0 - 0 0 0 Empty
/dev/sde3 0 - 0 0 0 Empty
/dev/sde4 0 - 0 0 0 Empty
ubuntu@ubuntu:~$ sudo /sbin/sfdisk -l /dev/sdf

Disk /dev/sdf: 30401 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sdf1 0+ 30400 30401- 244196001 8e Linux LVM
/dev/sdf2 0 - 0 0 0 Empty
/dev/sdf3 0 - 0 0 0 Empty
/dev/sdf4 0 - 0 0 0 Empty
ubuntu@ubuntu:~$ cat /proc/mdstat
Personalities :
unused devices:

Listing 3. Scanning a disk for RAID array members

ubuntu@ubuntu:~$ mdadm --examine --scan /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1
ubuntu@ubuntu:~$

ubuntu@ubuntu:~$ sudo mdadm -E /dev/sdb
mdadm: No md superblock detected on /dev/sdb.

ubuntu@ubuntu:~$ sudo blkid
/dev/sdb1: UUID="Jppgxo-zjR2-IgZD-qD7T-800y-y46t-g0vyU8" TYPE="lvm2pv"
/dev/sdc1: UUID="3eVlZN-PoI1-H8yB-aSGt-k3z2-LYwx-1bHu55" TYPE="lvm2pv"
/dev/sdd1: UUID="cJEYms-03vV-agy8-JWWh-5kCH-Y61W-s9LFse" TYPE="lvm2pv"
/dev/sde1: UUID="67i1d6-B6LC-YGdy-6Zcv-aBJq-K0UY-Op1PWB" TYPE="lvm2pv"
/dev/sdf1: UUID="X6I6jt-A3R7-Qbcu-rzjk-aH4t-IRBw-mwcOux" TYPE="lvm2pv"

ubuntu@ubuntu:~$ sudo pvdisplay
--- Physical volume ---
PV Name /dev/sdb1
VG Name fileserver
PV Size 232.88 GB / not usable 673.00 KB
Allocatable yes
PE Size (KByte) 4096
Total PE 59618
Free PE 15752
Allocated PE 43866
PV UUID Jppgxo-zjR2-IgZD-qD7T-800y-y46t-g0vyU8

--- Physical volume ---
PV Name /dev/sdc1
VG Name fileserver
PV Size 232.88 GB / not usable 673.00 KB
Allocatable yes
PE Size (KByte) 4096
Total PE 59618
Free PE 44258
Allocated PE 15360
PV UUID 3eVlZN-PoI1-H8yB-aSGt-k3z2-LYwx-1bHu55

--- Physical volume ---
PV Name /dev/sdd1
VG Name fileserver
PV Size 232.88 GB / not usable 673.00 KB
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 59618
Free PE 0
Allocated PE 59618
PV UUID cJEYms-03vV-agy8-JWWh-5kCH-Y61W-s9LFse

--- Physical volume ---
PV Name /dev/sde1
VG Name fileserver
PV Size 232.88 GB / not usable 673.00 KB
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 59618
Free PE 0
Allocated PE 59618
PV UUID 67i1d6-B6LC-YGdy-6Zcv-aBJq-K0UY-Op1PWB

--- Physical volume ---
PV Name /dev/sdf1
VG Name fileserver
PV Size 232.88 GB / not usable 673.00 KB
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 59618
Free PE 0
Allocated PE 59618
PV UUID X6I6jt-A3R7-Qbcu-rzjk-aH4t-IRBw-mwcOux

ubuntu@ubuntu:~$ sudo vgdisplay
--- Volume group ---
VG Name fileserver
System ID
Format lvm2
Metadata Areas 5
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 0
Max PV 0
Cur PV 5
Act PV 5
VG Size 1.14 TB
PE Size 4.00 MB
Total PE 298090
Alloc PE / Size 238080 / 930.00 GB
Free PE / Size 60010 / 234.41 GB
VG UUID kkDoou-3xxF-P1zZ-vAKX-3rlp-PZ2j-Rph3th

ubuntu@ubuntu:~$ sudo lvdisplay
--- Logical volume ---
LV Name /dev/fileserver/share
VG Name fileserver
LV UUID aNKpVU-0TPC-vTvP-Cf4e-ZqNh-ILPY-ZgaTBF
LV Write Access read/write
LV Status NOT available
LV Size 40.00 GB
Current LE 10240
Segments 1
Allocation inherit
Read ahead sectors auto

--- Logical volume ---
LV Name /dev/fileserver/backup
VG Name fileserver
LV UUID 18TTgL-TGz2-rxgP-MyT5-dVsD-mylO-is7VKv
LV Write Access read/write
LV Status NOT available
LV Size 60.00 GB
Current LE 15360
Segments 1
Allocation inherit
Read ahead sectors auto

--- Logical volume ---
LV Name /dev/fileserver/media
VG Name fileserver
LV UUID VC4KPD-Z4O5-rSGM-P3LR-S1Xu-Ho1Y-9l1dO1
LV Write Access read/write
LV Status NOT available
LV Size 830.00 GB
Current LE 212480
Segments 4
Allocation inherit
Read ahead sectors auto
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  #2  
Old 19th May 2009, 09:27
denali206 denali206 is offline
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Default LVM2 over RAID5 Recovery Help Needed

Can anyone help??
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  #3  
Old 26th May 2009, 19:49
raid.recover raid.recover is offline
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Default RAID 5 recovery remotely

Have you tried turning to RAID Recovery Online?
They have a lot of experience with RAID 5 recovery and they will perform a free remote diagnostic of your RAID. After a few hours, you will receive a list of recoverable files.
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  #4  
Old 6th January 2010, 12:52
Tommy Silver Tommy Silver is offline
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Default

i would also suggest you to contact the website above ( www.raid-recovery-online.com ) . I tried using them some weeks ago and was preety happy with the result. You can ask for a free diagnostic and it is not obligating. you can just see what the problem is...
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