Dual Port Support; Scsi Commands Supported - Seagate CHEETAH 15K.7 SAS ST3300457SS Product Manual

12.2

Dual port support

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.
12.3

SCSI commands supported

Table 20 lists the SCSI commands supported by Cheetah 15K.7 drives.
Table 20: Commands supported by Cheetah 15K.6 SAS family drives
Command name
Change Definition
Compare
Copy
Copy and Verify
Format Unit [1]
DPRY bit supported
DCRT bit supported
STPF bit supported
IP bit supported
DSP bit supported
IMMED bit supported
VS (vendor specific)
Inquiry
Date Code page (C1h)
Device Behavior page (C3h)
Firmware Numbers page (C0h)
Implemented Operating Def page (81h)
Jumper Settings page (C2h)
Supported Vital Product Data page (00h)
Unit Serial Number page (80h)
Lock-unlock cache
Log Select
PCR bit
DU bit
DS bit
46
Command code Supported
40h N
39h N
18h N
3Ah N
04h Y
N
Y
Y
Y
Y
Y
N
12h Y
Y
Y
Y
Y
Y
Y
Y
36h N
4Ch Y
Y
N
Y
Cheetah 15K.7 SAS Product Manual, Rev. D