With DAS i know i can have multiple SCSI RAID cards in my server and have as many drives attached to my server as there are drive letters (a - z) so 26.
With SAN - are you restricted in the same way? i.e. do drives in a SAN just appear to the hosts as standard drives? in that case - is a single host limited to recognising 26 drives? using 300 GB drives thats only 7.8 TB.
How does SAN scale beyond that?