Seagate (ST16000NM002G) - Инструкция по эксплуатации - Страница 44

Seagate Exos X16 SAS Product Manual, Rev. K

43 

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Interface requirements

11.0 Interface requirements 

This section partially describes the interface requirements as implemented on Exos X16 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 Exos X16 drives.

11.1.1  task management functions

Table 

Table 5

 lists the SAS task management functions supported.

11.1.2  task management responses

Table 

Table 6

 lists the SAS response codes returned for task management functions supported.

11.2

Dual port support

Exos X16 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 Exos X16 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 5

SAS task management functions supported

Task name

Supported

Abort Task

Yes

Clear ACA

Yes

Clear task set

Yes

Abort task set

Yes

Logical Unit Reset

Yes

Query Task

Yes

Table 6

Task management response codes

Function name

Response code

Function complete

00

Invalid frame

02

Function not supported

04

Function failed

05

Function succeeded

08

Invalid logical unit

09