44
Cheetah 15K.7 SAS Product Manual, Rev. A
10.2
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.
10.3
SCSI commands supported
Table 19 lists the SCSI commands supported by Cheetah 15K.7 drives.
Table 19:
Commands supported by Cheetah 15K.6 SAS family drives
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
