Seagate ST200FM0012 ユーザーズマニュアル
P
ULSAR
.2 SAS P
RODUCT
M
ANUAL
, R
EV
. C
42
11.0 I
NTERFACE REQUIREMENTS
This section partially describes the interface requirements as implemented on Pulsar.2 drives. Additional information is provided in the SAS
Interface Manual
Interface Manual
(part number 100293071).
11.1
SAS
FEATURES
This section lists the SAS-specific features supported by Pulsar.2 drives.
11.1.1
Task management functions
11.1.2
Task management responses
11.2
D
UAL PORT SUPPORT
Pulsar.2 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.
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.
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 Pulsar.2 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.
• 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 14 SAS task management functions supported
T
ASK NAME
S
UPPORTED
Abort Task
Yes
Abort task set
Yes
Clear ACA
Yes
Clear task set
Yes
I_T Nexus Reset
Yes
Logical Unit Reset
Yes
Query Task
Yes
Query Task Set
Yes
Query Asynchronous Event
Yes
Table 15 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