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Barracuda ATA II 100 Family Product Manual, Rev. A
2.2.2 Cable-select option
Computers that use cable-select determine the master and slave drives
by selecting or deselecting pin 28, CSEL, on the interface bus. Master
and slave drives are determined by their physical position on the cable.
To enable cable select, set a jumper on pins 5 and 6 as shown in Figure
2 on page 18. Refer to your computer manual to determine whether your
computer supports this option.
2.2.3 Alternate capacity jumper
Some older computers may "hang" if their BIOS detects a hard drive that
has more than 4,092 cylinders at startup. To eliminate this problem, the
drive includes a capacity-limiting jumper that sets the drive's default
translation geometry to 4,092 cylinders (2.1 Gbytes). To realize the full
capacity of the drive, you can use third-party software such as DiskWizard.
2.2.4 Ultra ATA/100 cable
An 80-conductor 40-pin cable is required to run Ultra DMA mode 3, mode
4 and mode 5. This cable uses even-numbered conductors connected
to the ground pins to improve signal integrity.
Notes:
1. The drive supports both host and drive cable detection. The host
detects the 80-conductor cable by sampling pin 34, CBLID–, on
the interface bus. The drive detects the 80-conductor cable by
sensing a capacitor at the host side through the CBLID– signal.
The result is reported in a Fast Rise Detected bit (bit 13 of word
93 in the Identify drive parameter block).
2. When using a 40-pin 80-conductor cable, attach the blue con-
nector to the motherboard, the black connector to the master
drive, and the grey connector to the slave.
2.1 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. See Figure
3 on page 20 for drive mounting dimensions. Follow these important
mounting precautions when mounting the drive:
•
Allow a minimum clearance of 0.030 inches (0.76 mm) around the
entire perimeter of the drive for cooling.
•
Use only 6-32 UNC mounting screws.
19
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