Interface Requirements; Sas Features; Task Management Functions; Task Management Responses - Seagate Constellation ST4000NM0023 Product Manual

11.0 I
NTERFACE REQUIREMENTS
This section partially describes the interface requirements as implemented on Constellation ES.3 drives. Additional information is
provided in the SAS Interface Manual (part number 100293071).
11.1 SAS
FEATURES
This section lists the SAS-specific features supported by Constellation ES.3 drives.
11.1.1

task management functions

Table 7 lists the SAS task management functions supported.
Table 7 SAS task management functions supported
T
ASK NAME
Abort Task
Clear ACA
Clear task set
Abort task set
Logical Unit Reset
Query Task
11.1.2

task management responses

Table 8 lists the SAS response codes returned for task management functions supported.
Table 8 Task management response codes
F
UNCTION NAME
Function complete
Invalid frame
Function not supported
Function failed
Function succeeded
Invalid logical unit
11.2 D
UAL PORT SUPPORT
Constellation ES.3 SAS drives have two independent ports. These ports may be connected in the same or different SCSI domains. Each
drive port has a unique SAS address.
The two ports have the capability of independent port clocking (e.g. both ports can run at 6Gb/s or the first port can run at 6Gb/s while the
second port runs at 3Gb/s. The supported link rates are 1.5, 3.0, or 6.0 Gb/s.
Subject to buffer availability, the Constellation ES.3 drives support:
• Concurrent port transfers—The drive supports receiving COMMAND, TASK management transfers on both ports at the same time.
• Full duplex—The drive supports sending XFER_RDY, DATA and RESPONSE transfers while receiving frames on both ports.
C ES.3 SAS P
ONSTELLATION
S
UPPORTED
Yes
Yes
Yes
Yes
Yes
Yes
R
ESPONSE CODE
00
02
04
05
08
09
M , R . C
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