Table 6-9: Abort Task Set Message Handling - Tandberg Data SLR7-140 PROGRAMMER Manual

Command
ERASE
LOAD/UNLOAD
REWIND
WRITE FILEMARK
INQUIRY
LOG SENSE
MODE SENSE
READ BLOCK LIMITS
READ POSITION
REQUEST BLOCK ADDRESS
REQUEST SENSE
MODE SELECT
PREVENT/ALLOW MEDIA REMOVAL
RELEASE
RESERVE
TEST UNIT READY
READ
READ BUFFER
LOCATE
SEND DIAGNOSTICS
SPACE
VERIFY (Not supported by SLR7 and
SLR140)
WRITE
WRITE BUFFER
Tandberg Data
Action
These commands continue to execute as if executed in Immedi-
ate (or buffered) mode.
When the WRITE FILEMARK command is aborted after
disconnection, it has already been executed.
If the ABORT TASK SET message is received before the
parameter data is transferred, transfer is suppressed.
Note that for the REQUEST SENSE command the parameter
data is usually lost. The other commands may be executed again
to get the parameter data once more.
The actual mode selection will not be performed if the command
is aborted immediately after the parameter data transfer (ATN
must be asserted during the data transfer). If the command is
aborted in any later phase, the mode selection will, however,
already have been performed.
These commands will be executed (the ABORT TASK SET came
too late).
If the command is aborted immediately after a data transfer (ATN
must be asserted during the data transfer), the next Read opera-
tion will start on the following block. The Initiator may request
sense information (Block Counter) to check the actual number of
blocks read.
This command will be aborted after the last data transfer. The
command may be issued again to retransfer the last
transferred data and also the data not transferred when the
command was aborted.
The actual seek operation will not be performed if the command is
aborted immediately after the parameter data transfer (ATN must
be asserted during the data transfer).
If the command is aborted in any later phase, the seek operation
will execute as if the command was executed in immediate mode.
The actual diagnostic operation will not be performed if the com-
mand is aborted immediately after the parameter data transfer
(ATN must be asserted during the data transfer). If the command
is aborted later, the diagnostic operation has, however, already
been performed.
The space operation will be terminated immediately. Note how-
ever, that if the Drive does not disconnect and ATN is asserted
some time after the command phase, the complete space opera-
tion will usually have completed before the Drive tests the ATN
line (the Drive tests for ATN only when changing bus phases).
The Initiator may request sense information (Block Counter) to
check the actual number of spaced blocks.
If the command is aborted immediately after a data transfer (ATN
must be asserted during the data transfer), the next Compare
operation will start on the following block. The Initiator may re-
quest sense information (Block Counter) to check the actual num-
ber of compared blocks.
If the command is aborted immediately after a data transfer (ATN
must be asserted during the data transfer), data in the last trans-
fer will not be written on tape. If the last block continues over sev-
eral transfers, then this complete block will not be written on tape.
This command will be aborted after the last data transfer. The
transferred data has already been written into the data buffer.

Table 6-9: ABORT TASK SET Message Handling

6-13 Tandberg SLR Product Line SCSI Functional Specifications
Message System