topic Re: extending file systems in Operating System - HP-UX

extending file systems

Scott Clement_2 — Wed, 08 Dec 2004 12:36:19 GMT

Trying to extend the /home file system. It states that it is in use. I run fuser -c and it only shows my current process probably from the fuser command but can not still umount it. What is the next stop even if I wanted to extend the / file system.

Re: extending file systems

Geoff Wild — Wed, 08 Dec 2004 12:40:12 GMT

fuser -cu /home

If you have online jfs - you don't need to unmount.

lvextend -L /dev/vg00/lvolX

fsadm -b M /home

Rgds...Geoff

Re: extending file systems

Sanjay_6 — Wed, 08 Dec 2004 12:40:59 GMT

Hi Scott,

If you don't have onlineJFS, try this,

to check on any process using /home filesystem,
# fuser -cu /home

if you are in /home directory, get out of that directory.
to kill all processes using /home
# fuser -ck /home

you should now be able to unmount /home and do lvextend / extendfs to extend the size of /home

If you have onlineJFS, you don't have to unmount /home to extend its size, do lvextend/fsadm to extend the size online.

You cannot extend the size of / filesystem, since it has to be contiguous. The only way to extend the size of / would be to reinstall the OS. You can take a ignite backup (take two) and then reinstall the OS on the system and at the time of installtion choose to increase the size of / filesystem.

Hope this helps.

Regds

Re: extending file systems

Victor BERRIDGE — Wed, 08 Dec 2004 12:42:38 GMT

Hi,
Do you have Online-Jfs?
Use sam...
If not
go to / do a fuser -ku /home
If you are still alive you should be able to umount now...

Good luck
Victor

Re: extending file systems

A. Clay Stephenson — Wed, 08 Dec 2004 12:46:42 GMT

You will find that lsof is a much better tool at spotting open files than is fuser.

In the worst case, you can bring the system up in single-user mode and use the commands in /sbin to grow the LVOL and extend the filesystem.

You should really purchase OnlineJFS. No HP-UX box should leave /home without it.

Even with OnlineJFS, contiguously allocated LVOL's can't be extended (except when there is free space adjacent to the last PE of the LVOL) so / and /stand can't be extended. The only real solution in that case is to use IgniteUX to reload the system.

Man lvextend, extendfs, fsasm for more details and don't use SAM for this until you know how to do all the steps manually.

Re: extending file systems

Pete Randall — Wed, 08 Dec 2004 12:50:00 GMT

Scott,

Sometimes, when all else fails, the easiest way is just to reboot into single user mode. Boot the box, interrupt at the 10 second prompt, interact with ISL and enter "hpux -is". That will bring you up in single user mode and none of the file systems will be mounted. I usually do a "mount -a" and then unmount /home so I will have access to the commands I need. From there, you can easily entend /home and then enter "init 3" to come on up into multi-user mode.

To expand the root file system ( / ), the easiest way is to make an ignite make_tape_recovery backup and use it to rebuild your root volume group, resizing file systems along the way.

Pete

Re: extending file systems

Scott Clement_2 — Wed, 08 Dec 2004 12:54:43 GMT

It still shows that root is connected to the /home. When I run fuser -ck /home it kills my process and it is back when I login. Root's home directory is the default /root. So why would it have a open file on /home?

Re: extending file systems

Victor BERRIDGE — Wed, 08 Dec 2004 12:57:11 GMT

It should not...
Check /etc/passwd, root's home should be /

All the best
Victor
P.S.
So no Online-Jfs?

Re: extending file systems

Sanjay_6 — Wed, 08 Dec 2004 13:17:02 GMT

Hi,

You probably had cd'ed into that directory. Otherwise did you login as another user whose home directory is in /home and then you did a sudo or su to change to root.

Hope this helps.

regds