Seagate Ultra 160 Manual Do Utilizador

120  

                                              

        Parallel SCSI Interface Product Manual, Rev. A

[2] The Task Management Flags field is defined in Table 48. If a Task Management function fails, the Task 

Manager shall terminate the task with Good status. The packetized failure code shall be set to Task Man-
agement Function Failed.

[3] The Additional CDB Length

 

field contains the length in 4-byte words of the Additional CDB

 

field.

[4] The Write Data (WRDATA) bit and READ Data (RDDATA) bit are defined in SCSI protocol standards T10/

1144D (FCP-2), sections 9.1, 9.1.16, and 9.1.17. They are also discussed in the Seagate Fibre Channel 
Interface Manual, part number 77767496. These two bits are used by drives in a Fibre Channel I/O sys-
tem and shall be ignored by this section.

[5] The CDB field contains the actual CDB to be interpreted by the addressed logical unit. The maximum 

CDB length is 16 bytes. The CDB

 

field and the task attribute field is not valid and is ignored if the Task 

Requests that the task be managed according to the rules for a simple task attribute. See the 

SCSI 

Architecture Model-4 standard

.

Requests that the task be managed according to the rules for head of queue task attribute. See the 

SCSI Architecture Model-4 standard

.

Requests that the task be managed according to the rules for an ordered attribute. See the 

SCSI 

Architecture Model-4 standard

.

Reserved.

Requests that the task be managed according to the rules for a simple task attribute. See the 

SCSI 

Architecture Model-4 standard

.

101b-111b Reserved.

00h

Indicates no task management requests for the current task.

01h

The task manager shall abort the task as defined in the ABORT TASK message (see Section 4.5.2).

02h

The task manager shall abort the task set as defined in the ABORT TASK SET message (see Section 
4.5.3).

04h

The task manager shall clear the task set as defined in the CLEAR TASK SET message (see Section 
4.5.5).

08h

The task manager shall perform a hard reset to the selected logical unit as defined in the LOGICAL UNIT 
RESET message (see Section 4.5.6).

20h

The task manager shall perform a hard reset as defined in the TARGET RESET message (see Section 
4.5.7).

40h

The task manager shall perform a clear ACA as defined in the CLEAR ACA message (see Section 4.5.4).

All other

 

values

 

reserve
d

The task manager shall terminate the task with a Good status. The packetized failure code shall be set to 
Task Management Function Not Supported.