cant unmount filesystem

[Nobody's Hero]

I am expanding a filesystem. I extended the VG.then I ran lvextend for the lvol. Now I am trying to run extendfs -F vxfs /dev/vg05/rlvol1
and I keep getting a message that /app is mounted. I kiled all user processes from 'fuser -cu /app'. I also ran fuser -ku /app. it still wont unmount. I am in the middle of this and I need to get it unmounted for production. I really need some help here.

[Michael Schulte zur Sur]

Hi,

I assume, fuser yields no result. Look for user with home directories in /app or processes running there. Reboot the machine if necessary. Have you exported /app in some way?

greetings,

Michael

[Nobody's Hero]

No I have not exported it at all. Not sure what has it and I am doing it remotely because of the snow storm. If i reduce the run level I'll drop networking.

[Nobody's Hero]

looks like I better put it in 4X4 and head into work. I guess Ill place a call to HP just to double check. Thanks for the quick response.

[Sridhar Bhaskarla]

Hi Robert,

If 'fuser /dev/vg05/lvvol1' does not give any pids, then you try 'lsof'. 'lsof' is much superior than fuser.

Do 'lsof /app' and see what are the processes that have open files on it.

There have been many posts here that can lead you to where you can download it.

-Sri

[Michael Schulte zur Sur]

Hi,

you may not want to reduce run level, as you said, but ir should be possible to reboot the machine, if in the past it had no problems coming up again.

Michael

[doug hosking]

The obvious causes of this are:
1) a process has a (possibly deleted) file in /app open
2) a process has a current working dir in /app

and (perhaps most likely)
3) you have a file system mounted under /app. (/app/app2 is a file system)

in which case you need to unmount /app/app2 before you can unmount /app.

[Srinivas Thokala_1]

If On_Line_JFS is installed on your system you can expand the file syste without unmounting.

After using lvextend for increaing the fs size, use the command
#fsadm -F VXFS -b size-in-MB /mount-point-
name

Ex: fsadm -F VXFS -b 1000MB /oracle
to increase /oracle to 1000MB size.

You no need to unmount the fs here.

Srini

[Rory R Hammond]

Fuser on the file system name will not work.
You have to use /dev/vg05/lvol1

Rory

[Jose Antonio Orozco]

If you have SO 11.0 or higher, lsof has been a a helpful tool for me in similar situation, showing all the processes that fuser don't show you
You can downloadit from the porting site http://eigen.ee.ualberta.ca/hppd/hpux/Sysadmin/lsof-4.70/

You can use it like

lsof /app

it will show all processes using the volume

my best regards

J. A. Orozco

[Robert-Jan Goossens]

Robert,

Have you got a filesystem mounted on top of /app, something like /app/oracle. If so unmount that filesystem before you unmount /app.

Hope this helps,
Robert-Jan

[MANOJ SRIVASTAVA]

Also there can be some process which is mounting or using the /app* as a path in its env , I would also prefer if you can give this is a single line

fuser -ck /dev/vgxx/lvolyy ; umount /dev/vgxx/lvolyy

Manoj Srivastava

[Anil C. Sedha]

Simple..

Run fuser -kc /app

Sometimes child processes keep spawning, so you will need to execute this command 3-4 times more till you see no process id in the result of this command.

When you see no process id, run the umount command and then run your extendfs command.

Let us know if this helps.

Anil