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Old 10-17-2007, 10:22 AM   #1
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Forcing LVM to see a bigger LUN


Here's my issue.

I have a Volume group which consists of one 100G LUN via a NetAPP SAN Filer. I also have a logical volume of 50g via this volume Group mounted with live data.
I want to be able to resize the 100G LUN to 120G on the SAN and then force LVM to see the extra 20G without having to umount the volume and mess about exporting data and rebuilding the Volume .......

Is there a way of shaking-up LVM to see the extra 20G (extents)? I would use Snapdrive (NetAPP software) but each snapdrive requires a licence and it would be nice to do this when required with my VMware RedHat Servers.

any LVM GURU's out there that know a trick or too with LVM2?

Old 10-20-2007, 07:29 PM   #2
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Why not just create a new 20 GB LUN, rescan the SCSI bus, then add the disk seen by Linux for the LUN to the existing Volume Group with pvcreate/vgextend?


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