Fujitsu MBA3147RC Manuale Utente
1.6 Transport layer
C141-C013
85
Table 1.37 TASK MANAGEMENT FUNCTION field
Code
Task
Management
function
LOGICAL
UNIT
NUMBER field
TAG OF
TASK TO BE
MANAGED
Field
Description
01h
ABORT TASK
yes
yes
Aborts a task that matches with
respect to I-T-L-Q.
respect to I-T-L-Q.
02h
ABORT TASK SET
yes
no
Aborts all the tasks that match
with respect to I-T-L.
with respect to I-T-L.
04h
CLEAR TASK SET
yes
no
Aborts all the tasks of the INIT.
Reports UNIT ATTENTION
(06/2F/00) to the INIT other
than nexus that performed abort
processing.
(06/2F/00) to the INIT other
than nexus that performed abort
processing.
08h
LOGICAL UNIT
RESET
RESET
yes
no
Aborts all the tasks of the INIT.
Reports UNIT ATTENTION
(06/29/03) to all the INITs.
(06/29/03) to all the INITs.
20h
Reserved
40h
CLEAR ACA
yes
no
Not supported
80h
QUERY TASK
yes
yes
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.
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.
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.
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.
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.
ADDRESS field of the OPEN frame, the drive sends the
CREDIT_BLOCKED primitive, and discards the TASK frame.
•
TAG field