Inspect Your Computer's Cables - Plextor PX-740A Installation And User Manual

Section 2. Installing the PX-740A Internal ATAPI Drive
Before you install your PX-740A, your computer's IDE configuration is
usually one of the following:
• Configuration A: Hard disks connected as Master and Slave devices
on primary IDE port; DVD or CD-ROM drive connected as the
Master device on secondary IDE port.
• Configuration B: Hard disk connected as Master device and DVD
or CD-ROM drive connected as Slave on the primary IDE port;
nothing connected to secondary IDE port.
• Configuration C: Hard disk connected as Master device on primary
IDE port; nothing connected to secondary IDE port.
• Configuration D: System uses special "Cable Select" cables; all
devices are jumpered for Cable Select.

Inspect Your Computer's Cables

To ensure that it can write at maximum rated speed (16X), you should
make sure the PX-740A is connected to an 80-conductor IDE/ATA flat
ribbon cable. If you have an older computer, it may still be equipped
with a 40-conductor cable.
NOTE: Although the newer IDE/ATA cable has 80 conductors (wires), its
connectors have only 40 pins, so it's physically interchangeable with the
older cable. And in fact, your PX-740A drive may work fine with a 40-
conductor cable. But to ensure writing at maximum speed, it's best to use
the newer 80-conductor cable, such as the one provided by Plextor. The
80-conductor cable cancels interference much better than the older
model, allowing faster data transfers.
CAUTION: The length of any IDE cable cannot exceed 18 inches.
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PX-740A Installation and Users Manual