Seagate ST3450857SS ユーザーズマニュアル

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Cheetah 15K.7 SAS Product Manual, Rev. A

Cheetah 15K.7 SAS drives have two independent ports. These ports may be connected in the same or differ-
ent 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 6Gbit/sec or the first 
port can run at 6Gbit/sec while the second port runs at 3Gbit/sec.) The supported link rates are 1.5, 3.0, or 6.0 
Gbits/sec.

Subject to buffer availability, the Cheetah 15K.7 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 19 lists the SCSI commands supported by Cheetah 15K.7 drives.      

Change Definition

40h

N

Compare

39h

N

Copy

18h

N

Copy and Verify

3Ah

N

Format Unit [1]

04h

Y

  DPRY bit supported

N

  DCRT bit supported

Y

  STPF bit supported

Y

  IP bit supported

Y

  DSP bit supported

Y

  IMMED bit supported

Y

  VS (vendor specific)

N

Inquiry

12h

Y

  Date Code page (C1h)

Y

 Device Behavior page (C3h)

Y

  Firmware Numbers page (C0h)

Y

  Implemented Operating Def page (81h)

Y

  Jumper Settings page (C2h)

Y

  Supported Vital Product Data page (00h)

Y

  Unit Serial Number page (80h)

Y

Lock-unlock cache

36h

N

Log Select

4Ch

Y

 PCR bit

Y

 DU bit

N

 DS bit

Y