The AX4-5 in iSCSI is qualify with the following linux distribution :
- Redhat RHLE 32 and 64 bit
- Suse SLES 32 and 64 bit
- Oracle enterprise Linux 32 and 64 bit

Refer to the AX4-5 support matrix pdf for more info :
https://elabnavigator.emc.com/emcpubs/elab/esm/pdf/CLARiiON_AX4-5_Series.pdf
Regards
Pierluca