[linux-lvm] gfs with multipath

[German Staltari]

Hi, It's possible to do a multipath device with devices that are part of 
a already created gfs filesystem without losing data? If the question 
it's not clear here is a detailed explanation:

I have created a gfs filesystem (the usual procedure) that has two paths 
to the same device (QLogic hba connected to an IBM SAN)
Example: /dev/sdb is the same as /dev/sdc and my PV was created with 
/dev/sdc.
Now I would like to create a multipath device with this devices 
(/dev/sdb and /dev/sdc) but I don't want to lose my data. Is that possible?

FC4
kernel-smp-2.6.15-1.1831_FC4
device-mapper-multipath-0.4.4-2.3
 LVM version:     2.01.08 (2005-03-22)
 Library version: 1.01.02 (2005-05-17)
 Driver version:  4.4.0
Fibre Channel: QLogic Corp. QLA2312 Fibre Channel Adapter (rev 02)


My question is related to my previous post:
https://www.redhat.com/archives/linux-lvm/2006-March/msg00051.html

Thanks
German Staltari