S
EAGATE
E
NTERPRISE
C
APACITY
3.5 HDD
V
4 SAS P
RODUCT
M
ANUAL
, R
EV
. A
47
11.0 I
NTERFACE REQUIREMENTS
This section partially describes the interface requirements as implemented on Enterprise Capacity 3.5 HDD v4 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 Enterprise Capacity 3.5 HDD v4 drives.
11.1.1 task management functions
Table 6 lists the SAS task management functions supported.
11.1.2 task management responses
Table 7 lists the SAS response codes returned for task management functions supported.
11.2
D
UAL PORT SUPPORT
Enterprise Capacity 3.5 HDD v4 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 Capacity 3.5 HDD v4 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.
Table 6
SAS task management functions supported
T
ASK NAME
S
UPPORTED
Abort Task
Yes
Clear ACA
Yes
Clear task set
Yes
Abort task set
Yes
Logical Unit Reset
Yes
Query Task
Yes
Table 7
Task management response codes
F
UNCTION NAME
R
ESPONSE CODE
Function complete
00
Invalid frame
02
Function not supported
04
Function failed
05
Function succeeded
08
Invalid logical unit
09
