I wanted to expand the root partition on our Oracle RAC cluster which is all run from our XIOTech Magnitude (SAN). The servers all have a QLogic card to connect to the SAN. When I fired up the system rescue cd, which contains gparted, the qla2xxx module loads, but the filesystem on the SAN is not recognized. This is what I did to fix it:
uname -r - remember this rmmod qla2xxx insmod /lib/modules/kernelversion/kernel/drivers/scsi/qla2xxx/qla2xxx.ko
After that, type in dmesg. You should see some stuff related to [sda] and XIOTech at the very end.
At this point, launch gParted -- and it will automatically recognize your filesystem.