EMC PowerPath Support Matrix

Diago,

multipathd is easy to use but I recommend checking EMC's best practices guide to get started. It works equally well on iSCSI or Fiber Channel and is directly plugged in linux's device manager.

Useful switches for multipath on Fiber Channel:

multipath -ll # to see all multipath'ed devices and their status
multipath # to rescan devices after an RSCN or a LIP reset

In short I've used multipathd on centos on Fiber Channel with the qla2xxx driver successfully (albeit on a 3PAR storage array).

If the AX is anything like the CX (CLARiiONs) I manhandle then the fist 5 disks of the enclosure hold the Flare OS and DB. If I remember right on the AX100 it is only the first 4... 0 to 3.

I am only truly familiar with CX and Flare 23 and Higher.

But the OS disks should be and are reported as capable of rebuilding to any "Compatible drive" if swapped out one at a time.
It must be completely done the rebuild and completely transitioned before moving to the next.
If the non-reserved space is unused, create a raid disk on it.
This will help indication show once the entire drive has migrated.
This is because the reserved space is migrated then the usable space.
Once you have swapped them you should be fine and can delete the raid disk IF you created it just for the migration.

500GB are the max "Supported" by the system. There are reports of "select" 1TB drives working with latter versions of FLARE for the AX. But I would stick with supported for the OS drives.