Increasing size of LV

[Denton Williams]

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.

[Stefan Farrelly]

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.

[Sridhar Bhaskarla]

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

[James R. Ferguson]

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...

[Craig Rants · Accepted solution]

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

[Jeff Machols]

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

[Helen French]

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

[Uday_S_Ankolekar]

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...

[Denton Williams]

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.