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14 Introduction Chapter 1

Processing SCSI Information

The following section describes how the Interface Manager (IM) processes SCSI

information when attached to Fibre Channel (FC) hosts.

1. A FC host issues a command. The FC host encapsulates the SCSI

command in the FC protocol and sends the packet to the IM.

2. The FC card in the IM receives the packet, interprets the FC information,

and places the packet in buffer memory.

3. The IM’s processor interprets the information and programs a 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.

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Hp Tape Library Interface Manager Software Manual do Utilizador Página 14