Tandberg Data SLR7-140 PROGRAMMER, Руководство пользователя

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Tandberg Data Message System
6-12 Tandberg SLR Product Line SCSI Functional Specifications
6.5. Abort Message Handling
If the Initiator transfers an ABORT TASK SET message
during the MESSAGE IN phase, the Drive will immediately
go to the BUS FREE phase. No Status or ending Message
will be sent. The Drive will remain in its current state
(MODE settings and current tape position must be kept).
When receiving a new command, the Drive will be able to
continue where that last aborted command left off.
See Section 4.6. Multiple Connections for a description
of ABORT TASK SET in overlapped command situations.
See also section 3.5.1. Attention (ATN) for details on
ATN signal handling. The following is true for all
commands:
„
If the ABORT TASK SET message is transferred before
the Drive enters the Command phase, then the Drive
will just go to the BUS FREE phase, effectively
ignoring the whole selection.
„
If the ABORT TASK SET message is transferred
immediately after the Command phase (ATN must be
asserted during command transfer), then the Drive
will just go to the BUS FREE phase, effectively
ignoring the whole command. This is true even if the
Drive detects errors in the command block (like Bus
Parity Error).
„
If the ABORT TASK SET message is transferred
immediately after the Status phase the command will
have been executed and the Drive will go to the BUS
FREE phase
The table on the following page describes ABORT TASK
SET- for all commands when the ABORT TASK SET-message is
transferred at any later stage in the phase sequencing.