Extending Volume group + increase /usr

[matthew bettinger]

Hello,

I've read many articles on extending volume groups from this list. I'd just like some reassurance. Here is what I have:
# bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 204800 32947 161118 17% /
/dev/vg00/lvol1 299157 39536 229705 15% /stand
/dev/vg00/lvol8 2609152 1281922 1248108 51% /var
/dev/vg00/lvol7 1007616 846609 150994 85% /usr
/dev/vg00/ud52 11960320 671932 10935672 6% /usr/ud52
/dev/vg00/lvol4 204800 120183 79844 60% /tmp
/dev/vg01/lvol1 36843520 5401784 31198000 15% /roi
/dev/vg00/lvol6 376832 256001 113557 69% /opt
/dev/vg00/lvol5 20480 2628 16979 13% /home
/dev/dsk/c3t2d0 80920 80920 0 100% /SD_CDROM

-----------------------------
I'd like to make /usr/ud52 1 gig in size and move the remaining disk space to /usr (For an IBM Redback installation)

Also,

We do not have online journal fs installed so there is no way I can do this remotely ?

Thank you.


# vgdisplay
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 9
Open LV 9
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 4350
VGDA 4
PE Size (Mbytes) 4
Total PE 4589
Alloc PE 4587
Free PE 2
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

VG Name /dev/vg01
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 1
Open LV 1
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 9000
VGDA 2
PE Size (Mbytes) 4
Total PE 8998
Alloc PE 8995
Free PE 3
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

[Pete Randall]

Matthew,

Without Online JFS, you'll need to do this in single user mode because you need to be able to unmount the file systems. Shrinking /usr/ud52 should be relatively straight forward - you're basically going to have to redefine it at the size you want and restore the contents. The process for /usr would be similar but it would probably be easier to accomplish it with an Ignite make_tape_recovery restore and rebuild of vg00. You can obtain Ignite here:
http://www.software.hp.com/products/IUX/index.html


Pete

[Tim Sanko]

Can you telnet to this server's console?

If you make an ignite server, you can do this remotely if you have webconsoles configured, or a KVM with network interface.

What do you have?

Tim

[G. Vrijhoeven]

Hi,

You best and quickest bet is to make an ignite tape ( entire vg00 ) and restore it.

Boot from the tape and go to advanced installation and go to the lvm tab and adjust the sizes to the size you like.

HTH,

Gideon

[doug mielke]

A stunt that may help is to edit /etc/fstab and comment out the /usr entry.

Then shutdown -r to reboot the system.

all /usr functions will be missing. (telnet, lvextend)

However, if you were to copy the relevent files ( everything in /usr) to another volume, then make a link from /usr directory to it (/sbin/ln) then maybe things like lvextend would work.

I've never tried this, but it might be fun to try. And if it keeps you off of a plane, it might be worth the effort.

[Todd McDaniel_1]

It is best to run a defrag on ud52 to reorg the data and free up extents on the end of the extent list to be used for the addition to /usr...

Then lvreduce and lvextend your 2 LVs and extendfs on /usr to activate the new space...

Unfortunately you will have to go to single to do the LVM work...

[doug mielke]

...while I have links on my mind, why don't you put your ibm installation where ever you have room, and link it to /usr

[matthew bettinger]

I also have a call into the vendor now regarding the symlink. That was my first thought. Anyways, thanks for all of the quick responses guys. I just try to avoid this sort of thing if at all possible.

[Sridhar Bhaskarla]

Hi Mathew,

Looking at your configuration, you have enough space in /var to temporarily store /usr/ud52. Bring down your application. Create a directory under /var/ud52. Copy the contents from /usr/ud52 to /var/ud52. Make sure everything got copied. Once it is done, umount /usr/ud52 and lvremove it. Reboot (not shutdown) the box into single user mode and extend /usr using lvextend and extendfs (using the commands from /sbin). Mount /usr and make sure it is of correct size. Bring the system into multi user mode. Create ud52 logical volume with a lower size and mount it back. Copy the contents back from /var/ud52 and start the application. If your application starts automatically at boottime, you can do the creation of the filesystem and copying in the single user mode itself.

-Sri

[Suresh Patoria]

Hi,

To do all the activity you can do via remote console

Do the following procedure

1)Take the backup of /usr/ud52

Note:While reducing your logical volume u will loose the data of your logical volume. So, make
at least two backup copy

2)umount the /usr/ud52
#umount /usr/ud52

3)Reduce the logical volume
lvreduce -L 1024 /dev/vg00/ud52

4)create the file system
#newfs -F vxfs /dev/vg00/rud52

5)mount the logical volume
#mount -F vxfs /dev/vg00/ud52 /usr/ud52

6)Restore your data
usig tar or fbackup

check everything working fine or not

Now you extend the /usr file system

1)restart the server in single user mode

Interrupt and boot pri , say N IPL to boot

To start in single mode use the

hpux -is

1) check the /usr file system mounted or not
If it is mounted then pls umount
#umount /usr
If it not then fine

2)type the following command
-->unset HISTFILE

3)type the following command
-->exec sh
NOTE:now you will able to use the command after umouning /usr

4)extend the file system
#lvextend -L <> /dev/vg00/lvol7
say if you to increase 1Gb then

#lvextend -L 2048 /dev/vg00/lvol7

#extendfs /dev/vg00/rlvol7

5)mount the file system

mount -F vxfs /dev/vg00/lvol7 /usr

check the file system

6)restart the server

Thanx