Marathon 810 (ST9816AG) Product Manual, August 1995 | 17 | |||
Jumper | Jumper |
|
|
|
for pins | for pins |
|
|
|
A and B | C and D | Configuration |
|
|
Removed | Removed | Drive is master; slave drive may be detected |
|
|
|
| using DASP– signal. CSEL is ignored. |
|
|
Removed | Installed | Drive is master; slave drive is present. CSEL |
|
|
|
| is ignored. DASP– is ignored. |
|
|
Installed | Removed | Drive is slave (a master drive should be |
|
|
|
| present also). CSEL is ignored. |
|
|
Installed | Installed | Differentiate master and slave drives using cable |
|
|
|
| select: If a drive is attached to a connector in which | ||
pin 28 is grounded, then it becomes a master. If a drive is attached to a connector in which pin 28 is ungrounded, then it becomes a slave.
2.3 Remote LED configuration
The drive indicates activity to the host through the DASP– line (pin 39) on the ATA interface. This line may be connected to a drive status indicator driving an LED at 5V. The line has a 30 mA nominal current limit. To avoid potential damage to the drive, the host should include a resistor in line with the LED for current limiting. This resistor should have a minimum resistance of 470 ohms (1,000 to 3,000 ohms is recommended).
2.4 Drive mounting
You can mount the drive in any orientation. Allow a minimum clearance of 0.030 inches (0.76 mm) around the entire perimeter of the drive for cooling. The drive conforms to the
Note. The I/O connector pins may extend up to 0.010 inches beyond the edge of the head/disc assembly.
Caution. To avoid damaging the drive:
∙Use M3X0.5 metric mounting screws only.
∙Do not insert mounting screws more than 0.150 inches (3.81 mm) into the mounting holes.
∙Do not overtighten the screws (maximum torque: 3
