How extend /usr

[M. FRANGEUL]

Hi,

How can extend the file system /usr on system HP-UX 11i (11.23).
I can't umount it, because it is always busy.

Cordialy
Didier.

[Leif Halvarsson_2]

Hi,
You need the OnlineJFS product. Or you have to backup/reconfigure/restore the system using Ignite.

[Fred Ruffet]

have a look at "fuser -cu /usr". If the process that are reported to use /usr can't be stopped, you'll have to boot into single mode.

Regards,

Fred

[Steven E. Protter]

If you have Online JFS you can extend hot.

swlist -l product | grep -i JFS

fsadm -F vxfs -b

I guess you do not though.

So:

at console

boot

interupt at the 10 second prompt.

bo

Y Interact

hpux -is

or

lpux -lm

There is a copy of the lvm commands in the /sbin folder

run lvextend and extendfs from there.

Make sure you know what disk you want to extend onto. Run reports and have them handy on paper before you start.

SEP

[M. FRANGEUL]

I have not Online JFS, I try whith the single mode.

Think's.

[Zinky]

You should have carefully planned your OS partitions. I have always mine as a large root - minimalist partitioning scheme (since you probably have an OS disk that is at least 36GB):

/stand - 512m, / - 8192m, /opt - 4096m, /var - 8192m, /tmp - 2048m - rest as swap.

In situations like this.. most servers often do not have contigous area left so I end up simply repartitioning by doing a tape or net recovery backup and restoring.

Create a tape recovery archive:

make_tape_recovery -I -Av
or
make_tape_recovery -I -Av -a /dev/rmt/?mn

Then boot that tape. I trust you know your BCH operations already. The -I option above stops Ignite Boot from automagicaly restoring so you can re-"carve" your OS disk(s) to suite your needs -- or go with a minimalist partitioning scheme where / and /usr is just one LVOL/partition.

[M. FRANGEUL]

How can enter in single mode on system
HP-UX 11.23 I have not the possibility after the reboot and the 10 secondes prompt to enter in the interact mode ???

What is the procedure for the maintenance mode ?

Thank's
Didier.

[Geoff Wild]

On boot,

Interact with IPL

hpux -is


But first, you will have to lvextend - if /usr is on /dev/vg00/lvol7, then

lvextend -L NEWSIZEINMB /dev/vg00/lvol7

Then reboot...

Then /sbin/fs_wrapper -F vxfs /dev/vg00/rlvol7


I think that will work...reason is, extendfs is a symbolic link:

ll /usr/sbin/extendfs
lrwxr-xr-x 1 root root 16 Oct 29 16:37 /usr/sbin/extendfs -> /sbin/fs_wrapper

and /usr will not be mounted...

Only other way is to use a make_tape_recovery

Rgds...Geoff

[Sachin Patel]

Hi Didier,
Here is what I have save in my email from long time. It works. I got this from this forum. It to expand /stand you can do that to /usr. I have done it before without any problem

Assumptions,

01. You are not just an "HP kid" who will play with ignite like stuff.

02. You like taking some risk & saving your valuable time

Size of /dev/vg00/lvol1 is A (boot or /stand or /dev/vg00/lvol1)

Size of /dev/vg00/lvol2 is B (swap or /dev/vg00/lvol2)

You wanna increase size of lvol1 from A to A+X (where X is not more than B - "physical memory installed in your machine")

Basically we have to decrease size of swap to increase boot as they are contigous.

Now Extending /stand is an easy job which can be performed in 10-15 minutes.

Steps

01. Boot your machine in LVM maintenance mode
(hpux -lm at ISL>)

#rm /etc/mnttab
#vgchange -a y /dev/vg00
#lvrmboot -r /dev/vg00
#lvremove /dev/vg00/lvol2
#lvextend -L "A+X" /dev/vg00/lvol1
#extendfs /dev/vg00/rlvol1
#lvcreate -L "B-(X+10)" -C y -r n -n lvol2 /dev/vg00
#lvlnboot -b /dev/vg00/lvol1
#lvlnboot -r /dev/vg00/lvol3
#lvlnboot -s /dev/vg00/lvol2
#lvlnboot -d /dev/vg00/lvol2
#reboot -r

You have your /stand extended now

[M. FRANGEUL]

Thank's at all,

accomplished mission
with Steven method :

-> single-user
-> interact Y
-> hpux -is

-> cd /sbin

-> lvextend and extendfs

Thank's again
Didier.