cannot unmount /usr : Device busy

[P.V.Ramesh]

Hi

I am receiving the above error when i am umount /usr. I have to extend the above file system. Can anybody help me on overcoming the above problem.

[John Poff · Accepted solution]

Hello,

You can't unmount /usr while the system is running at a regular run level (3). You'll have to shutdown the system and reboot into single user mode to extend /usr (if your /usr filesystem isn't vxfs and you don't have Online JFS installed).

JP

[eran maor]

Hi

you will need to boot to single user mode to do it :

when you will boot the system you will get this message :
Firmware Version 40.14
Duplex Console IO Dependent Code (IODC) revision 1
------------------------------------------------------------------------------
(c) Copyright 1995-1998, Hewlett-Packard Company, All rights reserved
------------------------------------------------------------------------------
Processor Speed State CoProcessor State Cache Size
Number State Inst Data
--------- -------- --------------------- ----------------- ------------
0 360 MHz Active Functional 512 KB 1 MB
Central Bus Speed (in MHz) : 82
Available Memory : 262144 KB
Good Memory Required : 37268 KB
Primary boot path: 0/0/2/0.0
Alternate boot path: 0/0/1/1.0
Console path: 0/0/4/0.0
Keyboard path: 0/0/4/0.0
Processor is starting autoboot process.
To discontinue, press any key within 10 seconds.


pleass any key and you will get this menu :

Command Description
------- -----------
BOot [PRI|ALT|] Boot from specified path
PAth [PRI|ALT] [] Display or modify a path
SEArch [DIsplay|IPL] [] Search for boot devices
COnfiguration menu Displays or sets boot values
INformation menu Displays hardware information
SERvice menu Displays service commands
DIsplay Redisplay the current menu
HElp [|] Display help for menu or command
RESET Restart the system
----
Main Menu: Enter command or menu >
enter bo

and you will be ask :
Interact with IPL (Y, N, or Cancel)?> y

ISL> hpux -is

this will boot to a single user mode .

you can also try to shutdown all your software and to see which process are using /usr with the command : fuser /usr but it is much easier to do it on single user mode

[Pete Randall]

Reboot. Interrupt the boot process when it says you have 10 seconds. Enter "boot pri", interact with ISL: "y". At ISL prompt, enter "hpus -is" to get to single user state. Enlarge the file system. Reboot.

Pete

[Leif Halvarsson_2]

Hi
Or use "init s" it is perhaps easier. See the man page for init.

[Sandip Ghosh]

I think init -S will not work. You have to reboot and boot it to single user mode.

Pete,

I think it's a typo.Type hpux -is instead of hpus -is.

Sandip

[Martin Johnson]

Yes, you have to reboot and come up in single user mode. init -s leaves processes running that access /usr.

Sometimes I still have problems with /usr even when booted in single user mode. I have found that doing a "mount /usr; umount /usr" usually fixes the problem.

HTH
Marty

[Rita C Workman]

Before you reboot into single user...

Do you have OnlineJFS???

...cause if you do you don't need to umount anything. Just extend the lvol with lvextend and then run fsadm -F vxfs -b(size_in_mb)m /filesystem (note there is no space between size and letter m).

Now if you don't have OnlineJFS - than take the above suggestions..

Rgrds,
Rita

[Pete Randall]

Sandip,

Good catch. Even when I proof read my answers those darn typo's slip through anyway.

Pete