HP Tape Library Interface Manager Software - Manual (Page 31)

Chapter 2 Choosing the Right Configuration 31
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Commands other than Write are not issued until status is received for any
pending Write. Also, status is not returned until the device completes the
command. For instance, when a synchronizing command is sent to the drive,
such as sending a Write File mark, a good status means all prior commands
have been successfully completed and data has been successfully written to the
medium. This is appropriate for such tasks as file backup/restore.
Note If the application requires confirmation of individual blocks
being written to the medium, such as audit trail tapes or log
tapes, this option should be disabled via the Telnet interface.
Address Mapping
SCSI targets are selected by mapping the appropriate values into the FCP LUN
field, and correlating a FC LUN value to a SCSI bus:target:LUN value. The FC
interface card acts as a single initiator on each SCSI bus, fixed at ID 7. All
commands passed through to a SCSI bus originate from this SCSI ID.
FC to SCSI Address Mapping can be independently set for each fibre interface
card in the IM.
Two variations of Indexed Addressing are possible when mapping SCSI targets
to FC initiators (hosts).
By default, the mapping table on each interface is created every time the IM is
power cycled or the individual interface is rebooted. This method is auto-
indexed.
If auto-indexed mode is disabled, then the mapping table already stored in the
IM’s memory will be used. This method is fixed-indexed.