Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
19
7.0 Electrical Interface7.1 FC-AL Connector
The drive conforms to SFF specifications 8045, 8067 and 8451. The SFF 8045/8067 documents defines the electrical specifi-
cation and SFF-8451 defines the mechanical specification. The only difference between SFF-8045 and SFF-8067 is the
Enclosure Service Interface. The drive will 'discover' the level of Enclosure Service Interface supported by the enclosure, and
use the proper level for enclosure communication. This 'discovery' process is defined in the SFF-8067 specification.
The connector is expected to be used in an environment which uses a common connector structure for racking disk drives in a
cabinet. The connector allows for plugging a drive directly into a backplane by providing the necessary electrical connection.
Mechanical stability and device retention must be provided by a mechanism outside the drive.
The signals defined in this connector include:
•Dual ported Fibre Channel In/Out control signals
• +5V and +12V power
• ID select
• Motor start control
• LED drive signals
• PBC Interlock control
• Fibre Channel link rate selection/Hard Reset
• Power control
7.1.1 40 pin SCA-2 SFF-8045 FC-AL Connector Definition
The drive uses the connector compatible with the SFF-8045 connector specifications. The connector contact assignment is
shown in following table.
Table 12:40-pin Connector Signal Definition
Signal Name Pin # Pin # Signal Name
-ENBL BYP CH1 1 21 12V Charge
12 Volts 2 22 12V Ground
12 Volts 3 23 12V Ground
12 Volts 4 24 +Port 1_In
-Parallel ESI 5* 25 -Port 1_In
-Drive Present 6 26 12V Ground
Ready LED Out 7 27 +Port 2_In
Power Control 8 28 -Port 2_In
Start_1/Mated 9 29 12V Ground
Start_2/Mated 10 30 +Port 1_Out
-ENBL BYP CH2 11 31 -Port 1_Out
Sel_6/-EFW 12* 32 5V Ground
Sel_5/-P_ESI_5 13* 33 +Port 2_Out