[linux-lvm] Sorry to bother you...

[Heinz J . Mauelshagen]

Kim,

in case you have no backup, it is unlikely that you can retrieve a lot of
your data anyway, because important metadata (and data) of the reiserfs 
is likely lost.

See my other mail today on linux-lvm for the 3 options you have to activate your
VG with or without disk replacement.


On Thu, May 22, 2003 at 11:07:09PM +0200, Kim Krüger-Monsen wrote:
> Hi!
> 
> I'm really sorry to bother you, but I'm desperate and I don't know any more to do in order to get my LVM partitions back up again.
> 
> I have a machine with three discs and together they formed one 226GB large partition using LVM. One of those discs crashed and the data is unrecoverable, leaving me with two discs which still contains data, but how do I extract the data?? I'm using reiserfs since it was the only filesystem which could be resized on the fly as I understood it. Somehow the volume group vg01 is nowhere to find any more after the crash, but I can still do a pvscan and see that the discs are intact.
> 
> Please give me some hints here. I have searched and searched for information and I can't find anything applicable in my case. I really need to get to the data that's still there hidden... no backup is made due to another problem. :-(
> 
> 
> Disc number one with still intact information.
> 
> --- Physical volume ---
> PV Name               /dev/hda8
> VG Name               vg01
> PV Size               24.66 GB [51710337 secs] / NOT usable 4.19 MB [LVM: 152 KB]
> PV#                   1
> PV Status             NOT available
> Allocatable           yes (but full)
> Cur LV                1
> PE Size (KByte)       4096
> Total PE              6311
> Free PE               0
> Allocated PE          6311
> PV UUID               13x8k8-ZCFk-aQib-FJXh-mDMj-QtG5-Xsfn4X
> 
> Disc number two with still intact information.
> 
> --- Physical volume ---
> PV Name               /dev/hdd1
> VG Name               vg01
> PV Size               115.04 GB [241254657 secs] / NOT usable 4.25 MB [LVM: 243 KB]
> PV#                   2
> PV Status             available
> Allocatable           yes (but full)
> Cur LV                1
> PE Size (KByte)       4096
> Total PE              29448
> Free PE               0
> Allocated PE          29448
> PV UUID               knCAic-bPGx-jc7e-ZviH-etMb-s0t2-TBWh6H
> 
> 
> 
> I have replaced the 80GB /dev/hdc1 with one 1GB drive just to see if it had any effect, but no...
> Disc number three 
> 
> pvdisplay -- "/dev/hdc1" is a new physical volume of 1.02 GB
> 
> 
> [root at linux etc]# lvmdiskscan
> lvmdiskscan -- reading all disks / partitions (this may take a while...)
> lvmdiskscan -- /dev/hdc1  [       1.02 GB] Primary  LVM partition [0x8E]
> lvmdiskscan -- /dev/hdd1  [     115.04 GB] Primary  LVM partition [0x8E]
> lvmdiskscan -- /dev/hda1  [     509.38 MB] Primary  LINUX native partition [0x83]
> lvmdiskscan -- /dev/hda2  [       4.88 GB] Primary  LINUX native partition [0x83]
> lvmdiskscan -- /dev/hda3  [       4.88 GB] Primary  LINUX native partition [0x83]
> lvmdiskscan -- /dev/hda4  [      28.08 GB] Primary  Windows98 extended partition [0x0F]
> lvmdiskscan -- /dev/hda5  [       1.46 GB] Extended LINUX native partition [0x83]
> lvmdiskscan -- /dev/hda6  [       1.46 GB] Extended LINUX native partition [0x83]
> lvmdiskscan -- /dev/hda7  [     509.38 MB] Extended LINUX swap partition [0x82]
> lvmdiskscan -- /dev/hda8  [      24.66 GB] Extended LVM partition [0x8E]
> lvmdiskscan -- /dev/hdb1  [      42.95 GB] Primary  LINUX native partition [0x83]
> lvmdiskscan -- 4 disks
> lvmdiskscan -- 0 whole disks
> lvmdiskscan -- 0 loop devices
> lvmdiskscan -- 0 multiple devices
> lvmdiskscan -- 0 network block devices
> lvmdiskscan -- 11 partitions
> lvmdiskscan -- 3 LVM physical volume partitions
> 
> 
> [root at linux etc]# ll /etc/lvmconf/
> total 5514
> -rw-r-----    1 root     root      1256248 Mar  2 05:43 vg01.conf
> -rw-r-----    1 root     root      1009720 Mar  2 05:42 vg01.conf.1.old
> -rw-r-----    1 root     root       927528 Mar  2 05:39 vg01.conf.2.old
> -rw-r-----    1 root     root       848480 Mar  2 01:33 vg01.conf.3.old
> -rw-r-----    1 root     root       843600 Mar  2 01:32 vg01.conf.4.old
> -rw-r-----    1 root     root       434000 Mar  2 01:06 vg01.conf.5.old
> -rw-r-----    1 root     root       290956 Mar  2 01:04 vg01.conf.6.old
> 
> /etc/lvmtab is empty same goes for the /etc/lvmtab.d directory
> 
> The device /dev/vg01....  is also gone but I think it was there earlier after the crash, but I have tried several ways of getting the info back so it might have been removed by issuing any of the commands??
> 
> Thanks a bunch for any hints or directions in order to get the information back...
> 
>     /Kim
> 

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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