[linux-lvm] Foreign HD with LVM-Partition, how to read Data?

[linux-lvm] Foreign HD with LVM-Partition, how to read Data?

[Alexander Bruns]

Hi,

I hot a HardDrive from a crashed System. The System-Harddrive is 
not recoverable, but the Harddrive with the LVM-Partition on it, 
is still "alive".

There was only one Partition in the VolumeGroup, so all the Data 
in the Logical Volume is on this single Partition.

Is there a way in to get the data read out of the Partition? It 
was formated with reiserfs on a RedHat Linux 7.1.

I activated the Hardware in my System and have now the same Running:

- RedHat 7.1 with all updates.
- self-compiled Kernel 2.4.6 with patched lvm 0.9.1_beta7

[root@holodeck lvmconf]# pvdisplay /dev/hda7
pvdisplay
--- Physical volume ---
PV Name               /dev/hda7
VG Name               lvm_volume_01
PV Size               48.54 GB / NOT usable 1.06 MB [LVM: 169 KB]
PV#                   1
PV Status             available
Allocatable           yes (but full)
Cur LV                1
PE Size (KByte)       4096
Total PE              12425
Free PE               0
Allocated PE          12425
PV UUID               cFFBJX-aqxr-P7kU-71OY-pgpX-rvtA-XxVpoc


So is there a way to get the data read out of this partition?

Greetings from Alex

Re: [linux-lvm] Foreign HD with LVM-Partition, how to read Data?

[svetljo]

Hi i could't completly understand you

is that true:

you have instaled Redhat on a working sepatarate drive
and you hace added a drive from a crashed system
if this is the case i hope you can run

vgscan -that will tell you the name of the volume group

vgchange -ay volume group name --that activates the volume

if you know the name of the logical volume you should be able to mount it
or if you don't know the name of the logical volume you can find it out 
from proc

cat /proc/lvm/global

you should see all VG'S PV's and LV's

so mount      /dev/ "volume group" / "Logical Volume"    / " where you 
want it" should work





could you give a bit more information
like fstab of the instaled RedHat




Alexander Bruns wrote:

>Hi,
>
>I hot a HardDrive from a crashed System. The System-Harddrive is 
>not recoverable, but the Harddrive with the LVM-Partition on it, 
>is still "alive".
>
>There was only one Partition in the VolumeGroup, so all the Data 
>in the Logical Volume is on this single Partition.
>
>Is there a way in to get the data read out of the Partition? It 
>was formated with reiserfs on a RedHat Linux 7.1.
>
>I activated the Hardware in my System and have now the same Running:
>
>- RedHat 7.1 with all updates.
>- self-compiled Kernel 2.4.6 with patched lvm 0.9.1_beta7
>
>[root@holodeck lvmconf]# pvdisplay /dev/hda7
>pvdisplay
>--- Physical volume ---
>PV Name               /dev/hda7
>VG Name               lvm_volume_01
>PV Size               48.54 GB / NOT usable 1.06 MB [LVM: 169 KB]
>PV#                   1
>PV Status             available
>Allocatable           yes (but full)
>Cur LV                1
>PE Size (KByte)       4096
>Total PE              12425
>Free PE               0
>Allocated PE          12425
>PV UUID               cFFBJX-aqxr-P7kU-71OY-pgpX-rvtA-XxVpoc
>
>
>So is there a way to get the data read out of this partition?
>
>Greetings from Alex
>
>
>
>
>_______________________________________________
>linux-lvm mailing list
>linux-lvm@sistina.com
>http://lists.sistina.com/mailman/listinfo/linux-lvm
>read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
>

Re: [linux-lvm] Foreign HD with LVM-Partition, how to read Data?

[Alexander Bruns]

Hi,

> Hi i could't completly understand you
>
> is that true:
>
> you have instaled Redhat on a working sepatarate drive
> and you hace added a drive from a crashed system
> if this is the case i hope you can run
>

no it is a newly installed system which never was intended to use lvm.
i only compiled lvm etc to get hopefully read the data of the
harddriver from the completely different system.

I never activated andy volume groups or defined something with lvm.

do i have to define a volumegroup with this harddrive with the same
name from the old system?


Greetings

Alexander Bruns

Re: [linux-lvm] Foreign HD with LVM-Partition, how to read Data?

[svetljo]

no you dont
you have to run vgscan

it will tell you what have it found and it should find the VG on the 
other disk
if vgscan does not tell you that the VG is activate you should run
vgchange -ay [and the name of the VG]

and then you go to /proc/lvm/  and take a look at a file called i think 
general
you can do ls and in case it's general
cat general
will give you information of all the VG's and LV's found on your PC

and you simply mount /dev/ [the name of the VG] / [ the name of the LV] 
  / [your mount point]
 
this should be all


Alexander Bruns wrote:

>Hi,
>
>>Hi i could't completly understand you
>>
>>is that true:
>>
>>you have instaled Redhat on a working sepatarate drive
>>and you hace added a drive from a crashed system
>>if this is the case i hope you can run
>>
>
>no it is a newly installed system which never was intended to use lvm.
>i only compiled lvm etc to get hopefully read the data of the
>harddriver from the completely different system.
>
>I never activated andy volume groups or defined something with lvm.
>
>do i have to define a volumegroup with this harddrive with the same
>name from the old system?
>
>
>Greetings
>
>Alexander Bruns
>
>
>
>
>
>
>_______________________________________________
>linux-lvm mailing list
>linux-lvm@sistina.com
>http://lists.sistina.com/mailman/listinfo/linux-lvm
>read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
>