Table 1.37 Task Management Function Field - Fujitsu MAU3147RC SERIES Technical Manual

Table 1.37 TASK MANAGEMENT FUNCTION field

Task
Code Management
function
01h ABORT TASK
02h ABORT TASK SET
04h CLEAR TASK SET
LOGICAL UNIT
08h
RESET
20h Reserved
40h CLEAR ACA
80h QUERY TASK
All others Reserved
If TASK MANAGEMENT FUNCTION is set to ABORT TASK or QUERY
TASK, the TAG OF TASK TO BE MANAGED field specifies the TAG value
from the COMMAND frame that contained the task to be aborted or checked. For
all other task management functions, the TAG OF TASK TO BE MANAGED
field shall be ignored.
When a drive receives a TASK frame, the following fields are checked:
•
HASHED DESTINATION SAS ADDRESS field
When this field contains a value different from the hashed SAS address of the
drive, the drive sends the ACK and CREDIT_BLOCKED primitives, and
discards the TASK frame.
•
HASHED SOURCE SAS ADDRESS field
When this field contains a value different from that in the SOURCE SAS
ADDRESS field of the OPEN frame, the drive sends the
CREDIT_BLOCKED primitive, and discards the TASK frame.
C141-C009
TAG OF
LOGICAL
TASK TO BE
UNIT
MANAGED
NUMBER field
Field
yes yes
yes no
yes no
yes no
yes no
yes yes
1.6 Transport layer
Description
Aborts a task that matches with
respect to I-T-L-Q.
Aborts all the tasks that match
with respect to I-T-L.
Aborts all the tasks of the INIT.
Reports UNIT ATTENTION
(06/2F/00) to the INIT other
than nexus that performed abort
processing.
Aborts all the tasks of the INIT.
Reports UNIT ATTENTION
(06/29/03) to all the INITs.
Not supported
When maintaining a task that
matches with respect to
I-T-L-Q, reports TASK
MANAGEMENT FUNCTION
SUCCEEDED. When not
maintaining a task that matches
with respect to I-T-L-Q, reports
TASK MANAGEMENT
FUNCTION COMPLETE.
1-65