[Linux-cluster] is necesary to to build GFS on top of LVM ?

Matthew B. Brookover mbrookov at mines.edu
Fri Sep 1 19:11:44 UTC 2006

I have an iscsi scan that would not work with out LVM.  As with your EMC
SAN I can expand a volume and expand a GFS file system within it.  Where
I get into trouble is identifying the volumes after a reboot.  What
was /dev/sdb may be /dev/sdc next time.  LVM allows you to name your
volumes and helps to track them down when the system is restarted.
There are similar problems when SCSI ID numbers get swapped around.


On Thu, 2006-08-31 at 12:16 -0700, Roger Peña Escobio wrote:

> Hi
> I was wondering why in the docs and examples the GFS
> filesystem is build on top of a lv "partition" ?
> I can understand that if I build the GFS in a direct
> scsi attached storage because is not easy to grow the
> "device" without destroy the data but the same apply
> in an SAN enviroment?
> We have here a EMC SAN, where is relative easy to grow
> a LUN, so can we skip the LVM layer and build the GFS
> filesystem directly over the emcpower device ? 
> there is any advantage of using LVM in this scenario?
> thanks in advance
> roger
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