How The Hp N1200-320 4Gb Network Storage Router Works; Processing Scsi Information; Hp N1200-320 4Gb Network Storage Router Features; Fibre Channel Features - HP N1200 - StorageWorks Network Storage Router User's And Service Manual

How the HP N1200-320 4Gb Network Storage Router works

The network storage router is a device that translates the Fibre Channel Protocol (FCP) to and from the SCSI
Protocol—transparently transferring commands, data, and status information—so that both the Fibre
Channel (FC) and SCSI devices and hosts can communicate with each other. Interconnection is provided
between two SCSI buses and one Fibre Channel Arbitrated Loop or Switched Fabric, making use of Fibre
Channel's ability to encapsulate SCSI protocol packets.

Processing SCSI information

The following section describes how the network storage router processes SCSI information when attached
to FC hosts.
1. A FC host issues a command, then encapsulates the command in the FC protocol and sends the packet
to the network storage router.
2. The network storage router receives the packet, interprets the FC information, and places the packet in
buffer memory.
3. The processor interprets the information and programs an internal SCSI controller to process the
transaction.
4. The SCSI controller sends the command to the SCSI device (target).
5. The SCSI target interprets the command and executes it.
6. Data flows between the FC host and SCSI target through payload buffers.
7. Response information flows from the SCSI target back to the FC host.

HP N1200-320 4Gb Network Storage Router features

Fibre Channel features

• One FC port (selectable between 4.25, 2.125 and 1.0625 Gbps)
• Fibre Channel Arbitrated Loop (FC-AL) including Point-to-Point configurations in arbitrated loop
topology only and Switched Fabric (FC-SW) topologies
• Private Loop Direct Attach (PLDA) profile compliant
• Class 3 operation with SCSI-FCP protocol
• Supports FCP-2 error recovery protocol as specified in FCP-2 rev. 04 and 05 for use with streaming
devices (such as tape)
• Optical SFP support (Shortwave)

SCSI bus features

• Auto-negotiation for Narrow, Wide, Fast, and up to Ultra320
• Concurrent commands, tagged command queuing and disconnect/reconnect
• SCSI-2 and SCSI-3 protocols
• Connection type is VHDCI 68-pin D shell, P type connectors
• LVD/single-ended termination
• Tape, optical, and changer devices

Management features

• Network storage router LUN commands
• Out-of-band Ethernet TCP/IP management access
• DHCP for easier network addressing
• Serial 3-pin connector for terminal access
• Ethernet RJ-45 connector for FTP, Telnet, and Web browser access
• Firmware that can be updated in the field
• SCC (FC only), Indexed, and Auto Assigned addressing modes
N1200-320 4Gb Network Storage Router user and service guide 11