Could you please suggest some references/books/white papers and/or notes on the mapping of SCSI onto FCP? I need information for constructing a frame header by information units available for an FCP. I would like to know it its IUs are transmitted as data in the FCC frames or not.

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There are a couple of good places to look for information on Fibre Channel standards that go into this level of depth.

You can always use Tom Clark's book on the FCP and iFCP protocols as a good basic reference document. Tom does excellent work in covering the protocols. Go to SearchStorage.com for a link to Tom's book called "IP SANS: A Guide to iSCSI, iFCP, and FCIP Protocols for Storage Area Networks."

Then there is the Carnegie Mellon Web site. Carnegie Mellon is a University in Pittsburgh, Penn. that excels in the area of computer science. There are a number of projects in process at the school and a lot of the work is published.

For links to research papers on IP storage, go to http://www.ece.cmu.edu/~ips/

The IETF or "Internet Engineering Task Force" is where all the "request for comments" are kept on things relating to Fibre Channel and SCSI. An RFC, as they are called, are working papers that describe the actual standards used by Hardware and software manufacturers developing for Fibre Channel solutions.

The task force is broken down into "committees" for each of the different projects and standards under development. The SCSI committee is the T10 committee. The T11 committee covers things related to Fibre Channel. Their working papers can be found at http://www.t11.org/index.htm for Fibre Channel and http://www.t10.org/index.htm for SCSI stuff.

After a proposed standard gets through the committee, it is usually submitted to ANSI to make it a de facto industry standard. ANSI stands for "American National Standards Institute." By the way, the committee that does the work for Fibre Channel mapping is the T11.4 subcommitte.

For more definitive information on things relating to Fibre Channel, you can hit the SNIA Web site. SNIA is the Storage Network Industry Association. It is comprised of almost every storage company on the planet, working together to help drive industry standards for storage networking. You may have to join in order to get at the technical working papers though.

By the way, to answer your question, the information on FCP that covers device attach, which included the SCSI stuff, is in the T11 committee document titled "T11/02-081v1." Go to the T11 Web site. Click on "drafts" on the left side of the Web page and scroll down to the "FC-DA" draft. You can download the PDF or DOC file from the link.

Chris

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This was first published in August 2002

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