extending logical volume size

[KPS]

Hello,

I'm not too familiar with striping so here goes...

I have a 4Gig mountpoint mounted up and striped across 4 different disks. I want to extend the size of the mountpoint to 8Gig. Can I run some sort of lvextend command to do this as an option or do I even have any options??

Thanks,
-Ken

[A. Clay Stephenson]

You can do this but you must have enough unused space on all 4 disks (1GB each) to do this. If you meet that condition then a simple lvextend will do the trick; if not, then you must backup and create the LVOL again.

[Leif Halvarsson_2]

Hi
Yes, If there is free space in the volume group this volume belongs to it is possible. The easiest vay is to use SAM/Disk and File system/Logical Volumes/Increase size for this. Note , If you don't have Onnline JFS otion installed, this filesystem should not be in use when doing this.

[Rodney Hills]

I used a manual method of striping where I would use lvextend of 1meg to each physical drive in a round robin fashion.

I built a script to generate another script with all the lvextend commands.

Hope this helps...

-- Rod Hills

[Sridhar Bhaskarla]

Hi Ken,

lvextend will automatically extend the logical volume including the striping provided one of the following is true.

1. You should have atleast 1 GB free on each disk.
2. Add four more disks to the volume group having the striped volume.

You can use the following procedure if you do not have onlineJFS.

umount /dev/vg??/lvol??
lvextend -L 8000 /dev/vg??/lvol??
extendfs /dev/vg??/rlvol??

Replace ??s with the corresponding numbers|names.

If you have online JFS, you don't need to unmount the lvol.

lvextend -L 8000 /dev/vg??/lvol??
fsadm -b 8192000 /mount_point

-Sri

[James R. Ferguson]

Hi Ken:

Yes, you can 'lvextend'. The requirement with striped logical volumes is simply that the same number of disks already striped across must be used to extend.

Regards!

...JRF...

[Sean Dale · Accepted solution]

I think SAM could be used to do this, too.