Verify that you are loading the driver with the same version. The host adapter shows up in the operating system, but I cannot see any of my connected Fibre Channel devices. Check cable integrity. Check the cables for solid connections. Make sure they are screwed down.
Inspect cable ends for bent pins.
Replace cables and GBICs if necessary. Check the drive power, make sure the drives are powering up and spinning. Watch the drive lights before, during, and after startup. Drive lights should flash at startup as they are scanned. This usually indicates that one or more drives in an ATTO stripe group is not being detected.