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3.2
Configuring the drive
Each drive on the Serial ATA interface connects point-to-point with the Serial ATA host adapter. There is no
master/slave relationship because each drive is considered a master in a point-to-point relationship. If two
drives are attached on one Serial ATA host adapter, the host operating system views the two devices as if they
were both "masters" on two separate ports. Both drives behave as if they are Device 0 (master) devices.
Serial ATA drives are designed for easy installation. If you connect the drive and receive a "drive not detected"
error, your SATA equipped motherboard or host adapter may use a chipset that does not support SATA 6.0Gb
speed autonegotiation. You will need to install a SATA host adapter that supports autonegotiation.
3.3
Serial ATA cables and connectors
The Serial ATA interface cable consists of four conductors in two differential pairs, plus three ground connec-
tions. The cable size may be 30 to 26 AWG with a maximum length of one meter (39.37 inches). See Table 6
for connector pin definitions. Either end of the SATA signal cable can be attached to the drive or host.
For direct backplane connection, the drive connectors are inserted directly into the host receptacle. The drive
and the host receptacle incorporate features that enable the direct connection to be hot pluggable and blind
mateable.
For installations which require cables, you can connect the drive as illustrated in Figure 7.
Signal connector
Signal cable
Power cable
Figure 7. Attaching SATA cabling
Each cable is keyed to ensure correct orientation. Pulsar.2 drives support latching SATA connectors.
3.4
Drive mounting
You can mount the drive in any orientation using four screws in the side-mounting holes or four screws in the
bottom-mounting holes. Follow these important mounting precautions when mounting the drive:
• Allow a minimum clearance of 0.030 in (0.76 mm) around the entire perimeter of the drive for cooling as a
guideline. Please refer to Section 3.5 for final cooling requirements.
• Use only M3 x 0.5 metric mounting screws.
• Four (4) threads (0.080 in) minimum screw engagement recommended. Also ensure maximum screw length
does not bottom out in mounting holes.
• Do not overtighten the mounting screws (maximum torque: 4.5 in-lb, ± 0.45 in-lb).
Pulsar.2 Product Manual, Rev. A
Power connector
25
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