topic Re: Increasing size of LV in Operating System - HP-UX

Increasing size of LV

Denton Williams — Thu, 17 Jan 2002 16:16:40 GMT

Hi All,
I am having problems increasing the size of a logical volume and it is giving me the error:

LV cannot be extended until the file system is able to umount.

Any help in getting this done will be very helpful.

Dee.

Re: Increasing size of LV

Stefan Farrelly — Thu, 17 Jan 2002 16:21:04 GMT

Unless you have a purchaseable product from HP called OnlineJFS you cannot extend an Lvol unless you unmount it, eg. /opt or ./var. If its an lvol in VG00 you will need to reboot in single user mode to do this. If its in another VG then you can try to umount it first, then lvextend it, then extendfs it, and remount it and youre done.

Re: Increasing size of LV

Sridhar Bhaskarla — Thu, 17 Jan 2002 16:21:08 GMT

Hi Denton,

This is the usual process for extending a logical volume.

1. Unmount the file system.
#umount /filesystem
2. Extend the logical volume
#lvextend -L new_size /dev/vg??/lvol?
3. Extend the file system on the lvol
#extendfs /dev/vg??/lvol?
4. mount the lvol back
#mount /dev/vg??/lvol? /filesystem

-Sri

Re: Increasing size of LV

James R. Ferguson — Thu, 17 Jan 2002 16:22:20 GMT

Hi Denton:

Unless you have Online JFS, then you *do* need to unmount a filesystem to increase its size.

You can verify that you have Online JFS by doing:

# swlist|grep -i onlinejfs

Regards!

...JRF...

Re: Increasing size of LV

Craig Rants — Thu, 17 Jan 2002 16:22:29 GMT

Denton,
Do you have OnlineJFS, I am assuming not.

Here is the process (this was in the doc I attached to your earlier post)

IV) How to increase the size of a logical volume without online JFS
(advanced JFS).
Note: the following example is using the volume group vg01 and the
logical volume lvhome

Note: Increasing the root filesystem (/) is not feasible

1) lvextend -L 240 /dev/vg01/lvhome
The new total size will be 240M.
2) umount /home
Note: If the filesystem is in use, it is impossible to unmount it.
Therefore stop all the processes (applications) that use the
filesystem then unmount it.
Processes that use /usr and /var cannot be all stopped,
the only solution is to reboot in single user mode.
3) extendfs -F vxfs /dev/vg01/rlvhome
4) mount /dev/vg01/lvhome /home

This is the process with onlineJFS

Extending a logical volume
lvextend ???L 770 /dev/vg00/lvol7
fsadm ???F vxfs ???b 770M /usr

GL,
C

Re: Increasing size of LV

Jeff Machols — Thu, 17 Jan 2002 16:23:03 GMT

you will need to unmount the filesystem the LV is mounted to. Then extend the LV, don't forget to extend the filesystem also

extendfd /filesystem

then you can re-mount it

Re: Increasing size of LV

Helen French — Thu, 17 Jan 2002 16:24:01 GMT

Denton:

Try this:
1)umount the file system
2)lvextend -L new size (in MB) lvname
3)newfs -F filesystem_type rlvname
4)mount file system

You need to unmount the file system before you extend it.

HTH,
Shiju

Re: Increasing size of LV

Uday_S_Ankolekar — Thu, 17 Jan 2002 16:25:13 GMT

Hi,

Since you don't have onlineJFS follow these steps to extend LV

1. Verify there is sufficient space in the volume group
vgdisplay -v /dev/vgxx look for Free PE (4Mb physical extents).

If the lvol is not in vg00:

2 umount /dev/vgxx/lvolx
3. lvextend -L size_Mb /dev/vgxx/lvolx

4. extendfs /dev/vgxx/rlvolx

5. mount /dev/vgxx/lvolx

USA...

Re: Increasing size of LV

Denton Williams — Thu, 17 Jan 2002 16:48:54 GMT

Thanks for your help guy's, this is a little too complicated so I will find a way around it for now and address this issue at later date.

Dee.