Many good options are available today to do this. Most use FC-IP as the connection method except for Nishan that uses iFCP. Several thousand miles distance will mean there will be latency involved. Make sure the vendor you choose provides enough "buffer credits" within their device to maximize performance, if the protocol or method requires them. You will find most devices provide a "store and forward" technique to alleviate some of the latency issues. I have a lot of experience with Nishan, and find it to be a good solution. It uses the iFCP protocol, which provides for device-to-device sessions. Other solutions include INRANGE, CNT and now Cisco.
As for software, this would usually require in-band data pooling through an appliance talking to another appliance at the remote end. There are numerous vendors in this area. Another little known software tool is Compaq's "Virtual Replicator," which provides for SCSI block oriented UDP access to IP connected storage pools and can run on any NT server. This will not "connect" SAN islands but will provide iSCSI like access to remote storage through an IP NIC and an agent on a client. This is an NT only method though.
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Dig Deeper on SAN technology and arrays
McData Corp. CEO John Kelley is excited about his company's position atop the director-class switch market. And while he's been blown away by the products his company acquired from Nishan Systems and isn't afraid to go toe-to-toe with Cisco, he knows that rolling out a director based on a new switch architecture is a tricky business.
In this interview, Kelley, who is also McData's chairman and president, addresses rumors about the company's falling behind schedule on product development plans for a new director, to be built on technology acquired from Sanera Systems Inc. Kelley also talks about rolling out new products while staving off heavy competition from the likes of Brocade and Cisco.
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