Seagate ST340015A ユーザーズマニュアル

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. 

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).

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 6 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.

• Use only .045” +/- .005 high by .050” diameter bosses (4x) for bottom mounting

applications to prevent deformation of the SeaShield.

• Do not overtighten the mounting screws (maximum torque: 6 inch-lb).

• Do not use a drive interface cable that is more than 18 inches long.

Computer

Motherboard

Pin 1

Note.  If you are using a 40-pin 80-conductor

cable, attach the 

connector to the 

motherboard, the 

 connector to the

master drive, and the 

 connector

to the slave.