LVM after Ignite

[Jeremy Loukinas]

I ignited a system today that over 22 VG's. During the ignite creation the vg confs said they were backed up, and the ignite process finished.

Now that I have reignited my machine my lvmtab is blank except for some info about vg00.

I tried running vgscan but I get the following..
The Volume Group /dev/vg01/group was not matched with any Physical Volumes.
The Volume Group /dev/vg02/group was not matched with any Physical Volumes.
The Volume Group /dev/vg03/group was not matched with any Physical Volumes.
The Volume Group /dev/vg04/group was not matched with any Physical Volumes.
The Volume Group /dev/vg05/group was not matched with any Physical Volumes.
The Volume Group /dev/vg06/group was not matched with any Physical Volumes.
The Volume Group /dev/vg07/group was not matched with any Physical Volumes.
The Volume Group /dev/vg08/group was not matched with any Physical Volumes.
The Volume Group /dev/vg09/group was not matched with any Physical Volumes.
The Volume Group /dev/vg10/group was not matched with any Physical Volumes.
The Volume Group /dev/vg11/group was not matched with any Physical Volumes.
The Volume Group /dev/vg12/group was not matched with any Physical Volumes.
The Volume Group /dev/vg13/group was not matched with any Physical Volumes.
The Volume Group /dev/vg14/group was not matched with any Physical Volumes.
The Volume Group /dev/vg15/group was not matched with any Physical Volumes.
The Volume Group /dev/vg16/group was not matched with any Physical Volumes.
The Volume Group /dev/vg17/group was not matched with any Physical Volumes.
The Volume Group /dev/vg18/group was not matched with any Physical Volumes.
The Volume Group /dev/vg19/group was not matched with any Physical Volumes.
The Volume Group /dev/vg20/group was not matched with any Physical Volumes.
The Volume Group /dev/vg21/group was not matched with any Physical Volumes.
The Volume Group /dev/vg22/group was not matched with any Physical Volumes.

Any advice?

[John Poff]

Hi,

Is the machine you ignited connected to the same disks that the source machine was? Your LVM is probably complaining because those volume groups that were described cannot see the physical volumes assigned to them. If you are connected to your disk storage, it is possible that your controller numbers have changed.

JP

[James R. Ferguson]

Hi:

If you Ignited to the same hardware as that from which you created your Ignite recovery tape, I'd say that the disk device files changed -- not uncommon during a cold-install (which this is).

If you want to use 'vgscan' to deduce what devices belong to what volume groups, make a copy of the current '/etc/lvmtab'; remove it; and run 'vgscan -p -v -a'. Redirect the output to a file for examination and put the 'etc/lvmtab' back in place. Now 'vgimport' your various volume groups using the correct device files.

Regards!

...JRF...

[Sridhar Bhaskarla · Accepted solution]

Hi,

There are couple of options.

One - Move /etc/lvmtab as /etc/lvmtab and run 'vgscan' and find out the disks corresponding to the VGS.

Two - Since you ignited the box from the old image, you will get the configuration files back in /etc/lvmconf with mapfiles. Look at the timestampes of vgxx.conf files. If they are reasonably new (or you are sure you didn't make any changes to the VGs after the dates indicated by the time stamps), you can get the PVs associated with the vgs by doing a 'strings vgxx.conf'. You will also find the map files.

#strings vg01.conf|grep dsk |sed 's/rdsk/dsk/g' > /tmp/vg01.disks
#mkdir /dev/vg01
#mknod /dev/vg01/group 0x010000
#vgimport -v -m /etc/lvmconf/vg01.map -f /tmp/vg01.disks vg01

If it is successful, then you can do a vgchange -a y and get the VG going.

-Sri

[Jeremy Loukinas]

Sridhar...


hp40:/dev # vgimport -v -m /etc/lvmconf/vg08.mapfile -f /tmp/vg08.disks
Usage: vgimport
[-p]
[-v]
[-s]
[-m MapFile]
VolumeGroupName PhysicalVolumePath...
or: vgimport [-p] [-v] [-m MapFile] -f InFile VolumeGroupName
More arguments required.
hp40:/dev #

Any suggestions..

[Pete Randall]

Jeremy,


You left out the vgname: last argument in Sri's command string (vg01).


Pete

[Jerome Baron]

Hi,

you forgot vg name.

Regards,
jerome