Interface Requirements; Sas Features; Task Management Functions; Task Management Responses - Seagate ST4000NM0011 Product Manual

10.0 Interface requirements

This section partially describes the interface requirements as implemented on Enterprise Performance - 3.5 HDD drives. Additional information is
provided in the SAS Interface Manual (part number 100293071).
10.1

SAS features

This section lists the SAS-specific features supported by Enterprise Performance - 3.5 HDD drives.
10.1.1

Task management functions

Table 3 lists the SAS task management functions supported.
Table 3 SAS task management functions supported
Task name
Abort Task
Clear ACA
Clear task set
Abort task set
Logical Unit Reset
Query Task
10.1.2

Task management responses

Table 4 lists the SAS response codes returned for task management functions supported.
Table 4 Task management response codes
Function name
Function complete
Invalid frame
Function not supported
Function failed
Function succeeded
Invalid logical unit
10.2

Dual port support

Enterprise Performance - 3.5 HDD 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 12Gb/s or the first port can run at 6Gb/s while the second
port runs at 3Gb/s.) The supported link rates are 3.0, 6.0, or 12.0 Gb/s.
Subject to buffer availability, the Enterprise Performance - 3.5 HDD 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.
Seagate Enterprise Performance - 3.5 HDD SAS Product Manual, Rev. B
Supported
Yes
Yes
Yes
Yes
Yes
Yes
Response code
00
02
04
05
08
09
39