General and Electrical Specifications
Table 3-2.
Physical Specifications
Parameter
Description
Packaging
Single board, 5.25-inch footprint,
5.75-inches by 8-inches
Cabling
20-pin Drive 1 and 2 data cables;
daisy-chained 34-pin drive control
cable; daisy-chained 4-pin power
connector; 50-pin flat-ribbon cable to
SCSI bus
Lengths
20-pin data cable: maximum length of 3
meters (10 feet); 34-pin control
cable: maximum length of 3 meters; 50-
pin SCSI cable: maximum length of 6
meters (20 feet)
Mounting
Mounts up to 3 meters (10 feet) away
from the ESDI 5.25-inch Winchester
disk drive using standard #6 screws
Holes (Set 1)
Length * 7.94 centimeters (cm) (3.125
inches) center to center; offset 4.13
cm (1.625 inches) from the front edge
of the board (the end that contains
the SCSI connector)
Width = 13.97 cm (5.5 inches) center
to center; offset 0.318 cm (0.125
inches) from the board edge
Hole Size = 0.396 cm (0.156 inches)
minimum
Holes (Set 2)
Length = 16.764 cm (6.600 inches)
center to center; offset 1.27 cm
(0.500 inches) from the front edge of
the board (the end that contains the
SCSI connector)
Width = 11.684 cm (4.600 inches)
center to center; offset 1.473 cm
(0.580 inches) from the board edge
Hole Size = 0.422 cm (0.166 inches)
minimum
3-4 Disk Controller Specifications
Summary of Contents for MD21/S2
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