topic Re: Logical Volume Manager in Operating System - HP-UX

Logical Volume Manager

Tracey — Tue, 30 Apr 2002 18:06:52 GMT

In my /etc/lvmconf directory I have two sets of files, one vg??.conf that is created with vgcfbackup and the other is vg??.mapfile - I can find reference to these files in the forum and that they are important - but for the life of me, I can't find out how I created them. ??

Re: Logical Volume Manager

Helen French — Tue, 30 Apr 2002 18:13:39 GMT

Hi Tracey:

It is not necessary that these files are created manually ! Everytime you modify anything with any VG, the changes will be deflected in the files in /etc/lvmconf. If you just do a vgextend/vgreduce/lvcreate ..etc, you could see a message appearing at last saying the 'modification has been done on /etc/lvmconf/vg??.?? file' or something similar. This is done by the LVM itself.

The map files are normally created when you do make_tape_recovery. Next time when you invoke this command, give -v option and check the messages.

HTH,
Shiju

Re: Logical Volume Manager

Clemens van Everdingen — Tue, 30 Apr 2002 18:13:49 GMT

Hi,

Those map files are created with vgexport -m command. (by hand or script)

This to do a vgimport on the system !

C.

Re: Logical Volume Manager

Jeff Schussele — Tue, 30 Apr 2002 18:14:06 GMT

Hi Tracey,

The .conf are created, as you say, with the vgcfgbackup command & can also be craeted/modified automatically by many of the vg & lv commands UNLESS you do -A n to suppress.

The .mapfile are created by the vgexport command when you use the -s parameter to write the file - believe vg_name.mapfile is the default filename & /etc/lvmconf is the default dir unless overridden with the -m parameter.

HTH,
Jeff

Re: Logical Volume Manager

hpuxrox — Tue, 30 Apr 2002 18:14:13 GMT

The vg??.mapfile was created from a vgexport -p command. Someone probibly created it.

Re: Logical Volume Manager

Helen French — Tue, 30 Apr 2002 18:18:15 GMT

Hi Tracey:

An addition: The make_tape_recovery invokes vgexport -p -s command for all VGs inorder to create those map files under default directory (/etc/lvmconf).

If you do this manually, you can give the map file location by giving -m option with vgexport.

HTH,
Shiju

Re: Logical Volume Manager

MANOJ SRIVASTAVA — Tue, 30 Apr 2002 18:36:23 GMT

Hi Tracey

The mapfiles contains information about the no. of lvols that particular volume group has got , you can recreate it by vi command .However if you have lost the conf file and the system is up I would recommend that you list the disk devices and do vgexport and import to create these files back.

Manoj Srivastava