Configuration issue with Storage 6180

Hi,

There are several questions on the same storage 6180 which I would appreciate any assistance on my enquiries.

1. The san storage has four drives however when performing fdisk -l command, two of the drives are not shown.

2. With reference to /var/log/messages, I could see same I/O error on the two drives which are not shown from the above command,

     kernel: end_request: I/O error, dev drive, sector 0

3. With reference to the command, multipath -ll, It is also showing that the two missing drives as faulty,

     \_ round-robin 0 [enabled]

     \_ 3:0:0:0 drive 8:16 [active][faulty]

From CAM, I do not see any major alarms nor any changes to the configurations were made recently, the only event highlighted in red from the Active Event List is that the link is down from the network switch.