Datasheet
Table Of Contents
- 1.0 Seagate Technology support services
- 2.0 Scope
- 3.0 Applicable standards and reference documentation
- 4.0 General description
- 5.0 Performance characteristics
- 6.0 Reliability specifications
- 7.0 Physical/electrical specifications
- 8.0 About FIPS
- 9.0 About self-encrypting drives
- 10.0 Defect and error management
- 11.0 Installation
- 12.0 Interface requirements
Constellation.2 SAS Product Manual, Rev. G 53
12.2 Dual port support
Constellation.2 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 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 6.0Gb/s.
Subject to buffer availability, the Constellation.2 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.