topic Re: vgexport in Operating System - HP-UX

vgexport

Jerry Thompson_2 — Mon, 14 Sep 2009 18:53:19 GMT

Hi,

I am getting ready to remove two volume groups from hp-ux 11.0 so the disk drives can be moved to another server. What hp-ux commands should I run to help me determine if any of the drives are being referenced? I have already checked 'bdf', 'swapinfo' and application raw space usage. What command checks dump space configuration? Anything else? What abount glance?

Thanks,
Jerry

Re: vgexport

James R. Ferguson — Mon, 14 Sep 2009 19:30:34 GMT

Hi Jerry:

> What command checks dump space configuration?

# crashconf -v

Regards!

...JRF...

Re: vgexport

Patrick Wallek — Mon, 14 Sep 2009 19:40:45 GMT

You can also do an:

lvlnboot -v

to show dump devices.

To check any LVM configuration:

pvdisplay -v

Re: vgexport

Jerry Thompson_2 — Mon, 14 Sep 2009 19:46:23 GMT

Perfect. thanks to all...

Re: vgexport

Michael Steele_2 — Mon, 14 Sep 2009 21:32:23 GMT

HI

RE: "...What hp-ux commands should I run to help me determine if any of the drives are being referenced? ..."

Not in HP_UX, only solaris or linux. Refer to what processes are attached to what file systems with 'fuser -cu /file system'.

If you want to drill down and id the disk mounted to the file system then you can use pvdisplay -v /dev/dsk/c.... and note the lv's. Then cross reference the lv's in /etc/fstab to the file system.

Re: "...remove two volume groups from hp-ux 11.0 so the disk drives can be moved to another server. ..."

If you can 'vgchange -a n vg' and deactivate the vg then nothing is attached to the vg. But really, you're going about this backwards. You want to unmount the file system associated to the vg first, and then deactivate the vg.

But then, this is incomplete. In order to move disk between servers you need to 'vgexport -p -m /tmp/vg_map_file -v /dev/vg'. Note the -p option. Without -p you delete the vg out of /dev and out of /etc/lvmtab.

ftp the map file over to the server and import it.

mkdir /dev/vg
mknod group file
vgimport

Re: vgexport

midoone103 — Tue, 15 Sep 2009 11:25:55 GMT

hello pal,
u can use "vgexport", when u wanna remove volume group, the uses will more formally.

# vgchange -a n vgO1
# vgexport vg01

may be that this is true.

Re: vgexport

Olivier Masse — Tue, 15 Sep 2009 21:01:57 GMT

I would personally do a vgremove. Unlike vgexport, vgremove is more strict and will not run unless there is are no longer any logical volumes inside the VG. These logical volumes must be removed with lvremove, which in turn have their own protection against accidental removal. Finally once you're done, do a pvremove to remove any PV information from the disk. Using this technique is the long road, but it is the safest one.

Good luck

Re: vgexport

Jerry Thompson_2 — Tue, 15 Sep 2009 21:05:41 GMT

Thanks to all. My volume groups are disabled using vgchange. Later, after resolving any screems, I will vgexport them and be done.

Re: vgexport

Michael Steele_2 — Sat, 26 Sep 2009 19:23:52 GMT

Gee, eight questions and points for only two of eight questions. Brutal. Just brutal.