ASSIGNMENT 12
Textbook Assignment: “Magnetic Disk Storage”, chapter 10—Continued, pages 10-21 through 10-33; and
“CD-ROM Storage”, chapter 11, pages 11-1 through 11-7.
12-1.
12-2.
12-3.
The velocity transducer in a disk memory set
drive unit helps control the acceleration and
deceleration of which of the following parts?
1. The drive motor
2. The spindle assembly
3. The carriage assembly
4. The operating frequency of the system
clock
The polarity and amplitude of the voltage
induced into the velocity transducer coil by
the transducer core indicates which of the
following movements are occuring?
1. The speed the disk is rotating
2. The speed of the carriage assembly only
3. The direction of travel of the carriage
assembly only
4. The speed and direction of the carriage
assembly movement
The servo circuit used to position the
read/write heads in a disk memory set is
centered on the right track when the error
voltage is equal to
1. -1 volt
2. 0 volts
3. +1 volt
4. +5 volts
12-4.,
12-5.
12-6.
98
The feedback signal in the velocity transducer
servo circuit performs which of the following
functions?
1.
2.
3.
4.
It is used to move the carriage faster
It tells the servo circuit when the desired
location is reached
It opposes the position error and dampens
carriage movement
It moves the heads by one track
If a disk has an error on its servo surface, it is
possible to rewrite the servo surface.
1. True
2. False
The number of sectors per track that will be
written on a disk memory set disk pack is
selectable by what means, if any?
1.
2.
3.
4.
The sector select switch only
A set sector size command from the
computer only
Either the sector select switch or a set
sector size command from the computer;
the result is the same
Not selectable, the number of sector per
track is fixed
