Help required in unmounting /usr

[Manjunath Shastry]

I am considerably new to HP-UX Administration.

I was trying to increase the size of /usr file system, it required an unmount but I was unable to unmount it as it was active. I used fuser to track the active processes and kill them but they were System related ones.

How can I increase the size of the file Systems which reside in rootvg and are always active.

Would appreciate your help.

[Ross Zubritski]

Hi,

You will need to either purchase the On-Line JFS option which will allow to to increase "busy" filessystems, or reboot the server in single user mode and extend the filesystem.

Regards,

RZ

[Pete Randall]

The only way to unmount /usr is to reboot in single user mode.

Pete

[Vicente Sanchez_3]

Hi,

You have to do it in single user.

Reboot the machine, stop autoboot and boot manually with
hpux -is.

This boot in single user and now you are able to extend /usr.

Before booting write the name of the lvol where usr is located.

After change it do init 3 or the level the machines has.

And, evaluate buy JFS-Online.

HTH. Vicente.

[James R. Ferguson]

Hi:

You need to boot up into single user mode wherein '/usr' isn't mounted in the first place. Once there, use the commands in '/sbin' to increase your logical volume size and then the actual filesystem ('lvextend' and 'extendfs'). When done, reboot or do 'init 3' to enter multiuser mode.

Regards!

...JRF...

[Jose Mosquera]

Hi,

Normally you can't umount /usr in multiuser mode, but... ...if you force this drastic command combination, /usr will be umonted

# fuser ???ku /dev/vg[nn]/lvol[n];umount /mount_point

In the past I've experimented troubles with sendmail service after do this, but just on 10.20

If you try this way or the ortodox ISL way you must do the followings steps to boot into SingleUser:

?? switch off/on the system
?? break bootprocess
?? boot to ISL
>boot pri isl
interact with IPL? YES
ISL> hpux -is

#lvextend ???L [new total size in Kb] /dev/vg[nn]/ lvol[n]
If fstyp = hfs
#extendfs ???F hfs /dev/vg[nn]/rlvol[n]
If fstyp = vxfs
#extendfs ???F vxfs /dev/vg[nn]/lvol[n]
#mount /dev/vg[nn]/lvol[n] /usr
#fsck /dev/vg[nn]/lvol[n]

Rgds.