46
Cheetah T10 SAS Product Manual, Rev. A
9.2
Dual port support
Cheetah 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 run at the same link rate. The first port to successfully complete speed negotiation sets the link
rate support by both ports. When the second port participates in speed negotiation, it indicates the only sup-
ported speed is the speed selected by the first port. If the first port to complete speed negotiation looses sync
before the second port completes speed negotiation, both ports revert back to the power on condition of allow-
ing either link rate (1.5 or 3.0 Gbits/sec).
Subject to buffer availability, the Cheetah 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.
Summary of Contents for Cheetah T10 SAS ST3146755SS
Page 1: ...Cheetah T10 SAS ST3300555SS ST3146755SS ST373355SS ...
Page 6: ...2 Cheetah T10 SAS Product Manual Rev A ...
Page 8: ...2 Cheetah T10 SAS Product Manual Rev A ...
Page 12: ...6 Cheetah T10 SAS Product Manual Rev A ...
Page 28: ...22 Cheetah T10 SAS Product Manual Rev A ...
Page 32: ...26 Cheetah T10 SAS Product Manual Rev A Figure 2 Typical ST3300555SS drive current profiles ...
Page 33: ...Cheetah T10 SAS Product Manual Rev A 27 Figure 3 Typical ST3146755SS drive current profiles ...
Page 34: ...28 Cheetah T10 SAS Product Manual Rev A Figure 4 Typical ST373355SS drive current profiles ...
Page 50: ...44 Cheetah T10 SAS Product Manual Rev A ...
Page 78: ...72 Cheetah T10 SAS Product Manual Rev A ...
Page 87: ......