What is the exact model of your RAID and are you connected via more than one FC cable?
Lion introduced ALUA support which may be at issue here. If you have two fiber connections to your RAID and it does not support ALUA but does support another form of multiplathing, that could be crossing things up. Try running with just one fiber connection or look into changing how the RAID controllers handle multipathing (if they do).
Re: Fibre channel Disk by Chip McGowan on Nov 16, 2011 at 2:49:00 pm
We have a similar issue and it's definitely a problem with the Infortrend drive unit.
We tried both LSI (Apple) and ATTO FC cards with latest drivers / firmware for the cards and the drive (Infortrend 12TB A08F-G2422). Nothing would work, even thought the drive would mount on other OS's.
We called everyone we know on the issue and then got this from Infortend:
As our compatibility list, your model ES A08F-G2422 supports Mac OS up to 10.6. 10.7 is not qualified yet. Your firmware version is latest. So to support Mac OS 10.7, you need a newer firmware that support 10.7, but I don't know when it will be released.
We're back reving our OS. Luckily we have some spare old licenses.
Apple's reply was "we don't support anything beyond the end of the fiber transceiver". When pressed about what drives are vetted, I couldn't get a solid answer there either. The Promise products "are well known" to them though.