Revenues from storage, networking and storage management software associated with Fibre Channel storage area networks (SANs) in open environments is expected to exceed $10 billion in 2002, up from less than $1 billion in 1997.
Survivability of the Optical Media outlasting the format
There are records of the Korean War that are essentially irretrievable not because the tape deteriorated, but because they’re on some weird format. How long will there be a reading device that will read today’s current optical format? Try finding a drive to read a 15-year-old 8-inch floppy.
NAS devices contain embedded processors that run some sort of OS or micro kernel that understands networking protocols and is optimized for particular tasks, such as file service. NAS devices usually deploy some level of RAID storage.
In short, SAN is essentially just another type of network, consisting of storage components (instead of computers), one or more interfaces, and interface extension technologies. The storage units communicate in much the same form and function as computers communicate on a LAN.