Seagate ST9300453SS, ST9300653SS Dual port support, Scsi commands supported, Supported commands

12.2Dual port support

Savvio 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 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.

Subject to buffer availability, the Savvio 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.

12.3SCSI commands supported

Table 7 lists the SCSI commands supported by Savvio drives.

Table 7:	Supported commands
Command name		Command code	Supported
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
TSD bit			Y
ETC bit			N
TMC bit			N

48 Savvio 15K.3 SAS Product Manual, Rev. A