can not increase logical volume

[szhiyong]

Hi,

I want to increase logical volume for lvol3. it is mounted to "/" directory. I try to increase the logical volume, but there is error message "can not umount, device busy". Then I "fuser -ku /". Then I "fuser -cu /", I can see "root still use this directory", so I still have "device busy" error message.

Would someone tell me how to solve this problem?

Thanks a lot.

zhiyong

[Ian Kidd_1]

What directory are you in? If you're in the mount point, you won't be able to umount it. Example:

# umount /opt/ignite
umount: cannot unmount /opt/ignite : Device busy

[Ian Kidd_1]

Whoa, I reread your question. Are you trying to grow / (root)?

[Joseph C. Denman · Accepted solution]

Not absolutely sure, but I think / need to be contiguous, which mean you will not be able to do it.

You could try booting from the support cd and attempting it. If not, you will need to create an ignite tape and rebuild from the tape.

...jcd...

[S.K. Chan]

Increasing "/" filesystem is not a straight forward task because of it's contigous nature. The make_tape_recovery method is the safest way to go. You cannot simply extend the logical volume while the system is running. Take a look at this thread (very recent), Patrick and Michael talk about using make_tape_recovery and I had a reference to another document that gives you another option by moving extents around.
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xcd1a36e69499d611abdb0090277a778c,00.html

[A. Clay Stephenson]

It's more than just a filesystem busy mount problem. The / filesystem, /stand, and primary swap must all be on contigious LVOL's. Your only real option is to do a make_tape_recovery and reload the OS using Ignite/UX. You are given a chance to resize the LVOL's when you Ingite the OS.

[Joseph C. Denman]

Looks like your out of luck.

Checkout this thread.

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xcd1a36e69499d611abdb0090277a778c,00.html

...jcd...

[Dave Chamberlin]

You cannot extend / (without rebuilding the file system) since it must be contiguous.

[Ian Kidd_1]

an option to bypass trying to grow root is to create a new logical volume. For example, some applications people created a directory, /log (I don't know why), which started causing problems. So we created /dev/vg03/appslog which mounted at /log.

[szhiyong]

Hi,All,

Thanks a lot for help!

I will make a recovery tape and boot from the tape.

zhiyong

[Fragon]

Hi,zhiyong:
Make sure you are use a no-rewind tape to do this. You can use make_recovery to achieve this if your Ignite-UX version is old. Just an example:
#make_recovery -CA

-Gerald Zhou-

[Yogeeraj_1]

hi,
The command I would use to create an make_tape_recovery tape is (assuming tape drive is /dev/rmt/0mn):

/opt/ignite/bin/make_tape_recovery -a /dev/rmt/0mn -I -v -x inc_entire=vg00

hope this helps!
Best Regards
Yogeeraj

[szhiyong]

Hi,

Thanks a lot!

I really appreciated it.

zhiyong