Backups. The enterprise has the advantage that once they pay for the LTO-5 tape drives, individual cartridges are cheap, rugged, and have a lifetime guarantee.
Who modded this moron up? Obviously, he's never had to buy LTO-5 tape drives in bulk. I don't mean a few boxes totally 25 tapes, but hundreds and THOUSANDS of cartridges. LTO-5 isn't cheap. The enterprises may be upgrading their tape drives, but the cartridges that are often bought are LTO-4 because they are so much cheaper. Plus they can still be used in the LTO-4 drives, for which putting an LTO-5 media in an LTO-4 is a waste of $$.
This is why backup to disk is moving in. Media is expensive and restore times are slow. However, backing up to tape is actually quite fast. Still requires a pretty fast source and server to saturate an LTO-5 drive with compression.
Having the ability to have fiber-channel bandwidth over the WAN fabric on the cheap would revolutionize things.
Hello. FC over WAN is called FCIP. It's already here and used as an ISL (inter switch link) rather than a host to array (or array to array) method. Yes I know that EMC has 1GbE blades for their arrays which do replicate SCSI over IP, but that's a proprietary solution and doesn't scale. How do all the arrays move data from site A to site B? They plug into a switch via FC and then the switch encapsulates the FC packets in IP packets. Then it's up to good old TCPIP to get you to your destination.
FCIP isn't exactly cheap, but the alternative, FC over DWDM is quite a bit more expensive. Go price out your next Cisco 15454 and get back to us.