topic Re: extend /var on HP-UX 10.20 in Operating System - HP-UX

extend /var on HP-UX 10.20

Lars Hesdorf — Wed, 30 Aug 2000 11:50:04 GMT

I seem to run into the "contiguous" problem when trying to extend to /var but do /var really need to be contiguous, and if not how to get around it.

Info:
I only have 2 disks that mirror each other, and there is plenty of space left in VG00

/Lars
lh@banctec.dk

Re: extend /var on HP-UX 10.20

CHRIS_ANORUO — Wed, 30 Aug 2000 11:56:08 GMT

You can remove the contiguous policy through SAM, then backup your /var, run bdf to get filesystem record, reboot to single user mode and do:
lvextend -L NNN /dev/vg00/lvoln
extendfs -F vxfs /dev/vg00/rlvoln
Reboot

Re: extend /var on HP-UX 10.20

Rick Garland — Wed, 30 Aug 2000 11:56:33 GMT

Lots of previous replies and very good info exist in previous posts.
Do SEARCH on /var for the forums.

Re: extend /var on HP-UX 10.20

James R. Ferguson — Wed, 30 Aug 2000 11:58:38 GMT

Hi:

Normally /var is not (nor need not be) specified as contiguous. If it was set contiguous during the lvcreate, then you don't have the flexability you might want. See the man pages for lvcreate.

...JRF...

Re: extend /var on HP-UX 10.20

Rita C Workman — Wed, 30 Aug 2000 12:01:36 GMT

It is only / that must remain contiguous. You can safely extend /var. From what I understand of your question, you are not adding any disk...just doing an increase to var. Just drop to single user mode and enter:
Do a bdf to ensure /var is not mounted.

lvextend -l _ _ _ /dev/vgoo/lvol_
extendfs /dev/vg00/rlvol_ /var

I then prefer to do a shutdown -ry 0....but whatever you prefer is ok..
Regards,

Re: extend /var on HP-UX 10.20

John Palmer — Wed, 30 Aug 2000 12:04:27 GMT

/var doesn't need to be contiguous and isn't by default.

Check with 'lvdisplay /dev/vg00/lvol?'

If contiguous is set then Allocation will be 'strict/contiguous' (if 'strict' is set of course which it should be if mirrored).

As it is mirrored, are you sur ethat you have enough space on both disks for the extension?

Re: extend /var on HP-UX 10.20

Pete Conneely — Wed, 30 Aug 2000 12:04:54 GMT

Lars,

If you click the SEARCH button on the left side menu and do a community search for 'extend and contiguous' there are many excellent examples of earlier answers to this type of problem.

Hope this helps.

Re: extend /var on HP-UX 10.20

Cheryl Griffin — Wed, 30 Aug 2000 12:12:59 GMT

/, /stand, and primary swap need to be contiguous.

With OnlineJFS or AdvJFS you can extend /var without booting into single user mode.

Without OnlineJFS, you will need to use fuser to quiet the filesytem or boot into single user mode and extend with lvextend and extendfs.

Re: extend /var on HP-UX 10.20

Denver Osborn — Sat, 02 Sep 2000 01:01:15 GMT

Lars,

You said you have VG00 Mirrored and get an error when extending var. I aggree with John on this one. Make sure you have enough free PE on both sides of the mirror to extend var.

# pvdisplay /dev/dsk/c?t?d?
Check that number of lvols are same, also for free PE on each disk in vg00.

If lvdisplay shows strict/contiguous and you have enough free PE on all disks in vg00 to extend var then it could be the space isnt contiguous.

To turn off contigous allocation:
# lvchange -C n /dev/vg00/lvol_var

As long as strict allocation policy is turned on for the mirrored lvol you are ok.

Hope this helps!