Acer HDS AMS200 Reference Manual page 334

FCP_LUN:
The FCP_LUN field specifies the Logical Unit Number in which the issued SCSI Command
is executed.
The Table D.1.13 shows the format of the FCP_LUN field.
Table D.13 FCP_LUN Format
Byte
Logical unit
number
FCP_CNTL:
The FCP_CNTL field contains the following control information.
Task Codes:
One of the following task attributes can be specified:
SIMPLE_QUEUE:
The SIMPLE_QUEUE attribute is specified when the task can be executed with the
order that the array controller determines.
HEAD_OF_QUEUE:
The HEAD_OF_QUEUE attribute is specified when the task should be executed with
the highest priority.
ORDERED_QUEUE:
The HEAD_OF_QUEUE attribute is specified when the task should be executed with
the order of the task is issued.
ACA_QUEUE:
This attribute is not supported by the AMS200.
UNTAGGED:
This attribute shows that a command has no tag.
Task Management Flags:
One of the following Task Management Flags can be specified:
TERMINATE TASK:
This Task Management Flag is not supported by the AMS200.
CLEAR ACA:
Suspend the action of all the commands which is being executed with the Logical
Unit from the host, or which is queuing, and then respond to ACA ACTIVE status. Also,
release the Logical Unit from the ACA status.
TARGET RESET:
The TARGET RESET is used to clear all tasks in the AMS200.
(Same as the SCSI-2 Bus Device Reset message)
CLEAR TASK SET:
The CLEAR TASK SET is used to clear all tasks in the specified Logical Unit.
(Same as the SCSI-2 Clear Queue message)
314 Appendix D Interfaces
0 1 2
0x00 LUN 0x00
(Max.256)
3 4 5
0x00 0x00 0x00
6 7
0x00 0x00