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Note:
For drives which do not require Reduced Write Current
and/or Write Precompensation, the user should set these
cylinder values at the number of data cylinders plus 1.
The Landing Zone position is used with the START/STOP command to
indicate the direction and number of cylinders from the last,
or
first, cylinders to the desired skipping or stopped position.
The most significant bit indicates the direction.
A 0 indicates
the landing zone is beyond the maximum cylinder; a
1
indicates it
is before track 0.
The other 7 bits indicate the number of
cylinders in the desired direction the head will stop.
The Step Pulse Rate specifies the timing of seek steps.
The
three options are:
00
=
Non-Buffered Seek (3.0 IDs/step)
01
=
Buffered Seek (28 us/step)
02
=
Buffered Seek (12 us/step)
BIT
BYTE
7
6
5
4
3
2
1
0
-------1------1------1------1------1------1------1------
00
List Format Code
=
2
01
MSB
02
03
04
MSB
05
06
MSB
07
08
09
OA
OB
Cylinder Count
Cylinder Count
Data Head Count
Reduced Write Current
Reduced Write Current
Write Precompensation
Write Precompensation
Landing Zone Position
Step Pulse Rate
Drive Type Code
Sector Count
Figure 6-26.
Drive Parameter List for
Hard-Sectored, Removable Drives
1
LSB
The Drive Parameter List for Hard-Sectored or removable drives
must begin with a
List Format Code of
02 and contains two
additional bytes.
This parameter list must be sent if the E-F or
500504-00
6-34
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