Dynabyte 11MB User manual

WINCHESTER
TECHNICAL MANUAL
11 & 23MB VERSIONS
AVAILABLE IN 5500, 5600, 5615, 5700, 5011, 5013, & 5015
PRELIMINARY -- FEBRUARY, 1981
PIN 404168

1.
2.
3.
4.
5.
CO}'7ENTS
GENERAL
...............................................
FEATURES
..............................................
Compact Size
............................... .
.....
Inexpensive ••.••••••
High Reliability •••••••••••••••.•••••••••.••.
2.1
2.2
2.3
2.4
2.5
2.6
Preventive Maintenance ..••.....•.••••.••..•...•....
DC Pover Supply ................................... .
Physical Dimensions •••.•.••.•••••••••••.••...•
2.7
Vertical or Horizontal Installation ••••••••.•.
2.8 Lo~ Power Consu~ption
2.9 Lo~ Noise
2.10 Low Vibration
SPECIFICATIONS
3.1
3.2
3.3
~.4
3.5
3.6
Performance
Reliability
Error Rate
Positioning Time
Start and Stop Time .••.••..••
Environmental Conditions
. ....
STRUCTt'TRE .•••••••••••••••••••••.•.••••.•.••••••••.•• .o ••
4.1
4.2
External Size
Unit Structure
INSTALLATION
5.1
5.2
5.3
Locker Installation
Service Areas
Transportation
i
Page
1
1
1
1
1
1
2
2
2
2
2
2
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6
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8
8
13
13
14
15

6.
7.
8.
CABLE CONNECTION
.....................................
6.1
6.2
6.3
6.4
6.5
6.6
Unit Connectors
......................................
Cable ~onnector Specifications •••••••••••••••••••••••
Single Connection
....................................
Connecting Multiple Units •••••••••••••••••••••••.•.••
......................................
Driver/Receiver
DC grounding
.........................................
INTERFACE
7.1
7.2
7.3
Signal Lines
Input Signals
Output Signals
........................................
7.4 Timing Specifjcations
7.4.1 Seek timing
"J .4 •2 Read /lI .. ri,te data timing •••••••••••••.•••••••••••••
7.5 Formats •.•••••••.•••.
7.5.1 Track format
7.5.2 Read/Write timing
7.6 Connector Positions
..............................,.
.............................
7•7 Power Supply Input Connector •••••.••.••••••.••••••••••
POWER SUPPLY COh~ITIONS
8.1
8.2
8.3
8.4
8.5
8.6
Input Voltage and Permissible Input Voltage
Variation ............................................. .
Current Values ....................................
Power Consumption
Current Waveforms
Power
ON/OFF Sequence ...............................
Others •••••••••••••.•
................................
9.
10.
MAINTENANCE PARTS
Connection to a .
....................................... .
Controller
-1i-
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24
26
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27
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30
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33
35
36
37
38

Figure 4.1
Figure 4.2
Figure
5.1
Figure
5.2
Figure
5.3
Figure
5.4
Figure
5.5.
Figure
6.1
Figure
6.2
Figure
6.3
Figure
6.4
Figure
6.5
Table 6.1
ILLUSTRATIONS
Structure ................................ .
Air Circulation ••••.•••••.••••••••••.•••••
Locker Installation •••••••••••••..•.••••••
Maintenance Sections ••••••••.••••••.•••.••
Fixing the Carriage •••••••••••••••••••••••
Fixing the Unit •••••••••••••••••••••••••••
Cable Holder •••••••••••••••••••••••••••••
Unit Connec tors •.••••••••••.•• 0 •••••••••••
Single Connection •••••••.••••••••..••...••
Connecting Multiple Units •••••••••••••••.•
Driver /Recei ver •••••••••••.•••••••.•.•••••
DC Grounding
TABLES
Cable Connector Specifications
Table 9.1 Maintenance Parts ••••••••••••••••..•••••••
APPENDICES
Appendix 1. Media Error ••••••••••.•••.••••.••••.•••••
Appendix 2. Switch Setting Procedures ••.•••. o •••••••••
-iii-
Page
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19
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18
37
1
3

1. GENERAL
The M2301A/M2302A ~ini·-disk drive unit is a compact (floppy size),
inexpensive, and highly reliable fixed disk drive developed for
random access use in small computers, word processors, and
terminals.
The storage capacities (unformatted) of the M2301A and M2302A are
11.1M bytes and 23.4M bytes, respectively.
2. FEATURES
2-1 Compact Size
Since the disks are 200mm in outer diameter and are driven by
a
DC motor directly connected to the spindle, the unit is
extremely compact in size:
8.5in. (width) x 4.4in. (height) x 14.0in. (depth)
2-2 Inexpensive
The stepping motor positioning mechanism uses a steel band
and
viscose damper. This simplifies the structure and lowers
the cost of the unit.
2-3 High Reliability .
Heads,
disks, and positioner (Winchester technology) are
hermetically sealed inside a plastic cover, and the air
inside the DE (disk enclosure) is kept clean by a
breather filter and recirculation filter. This increases
reliability by reducing the chance of a head crash.
2-4 Preventive maintenance is unnecessary.
-1-

2-5 DC Power Supply
The
integral DC spindle motor requires no adjustment for lj.ne
frequencies (50Hz/60Hz) or input power voltages (100, lIS,
220. 240V).
2-6 Physical Dimensions
Because
its physical size is the same as that of a floppy
disk drive, this unit can replace a floppy disk drive
without requiring a new locker.
2-7 Vertical or Horizontal Installation
The unit may be installed in its locker either vertically or
horizontally, whichever is optimal.
2-8 Low Power Consumption
The power consumption
is 60W when seeking and SOW when not
seeking. This low power consumption enables the unit to
be used in a very wide environmental temperature range
(50 to 45
0
C) without a cooling fan.
2-9 Low Noise
The unit's low noise output, less than '55' dB, (A-scaie
weighting)even during seeking makes it ideal for office use.
2-10 Low Vibration
The unit is attached to the locker through four vibration-
da~ping rubber mounts.
-2-

-,
3.
SPECIFICATIONS
3.1
Performance
Model
Spec .
Total storage ' Unformat
capacity
* Format
Storage capa-
Unformat
city/track
* Format
Number
of
platters
Number of heads (R/W)
(Clock)
Number of
cylinders
Number
of
tracks/cylinder
Number
of
sectors
Recording density
Track density
Transfer rate
Rotational speed
Average
rotational
Latency
Recording method
Positioning time
Input voltage
External size
Min
Ave
Max
width x height x depth
Disk size
Weight
[ME]
[liB]
[ B ]
[ B ]
:Li.==w:..-=::;::.~;."-
"'
=
Mini
-Disk Drive
M230l
M2302
:
11.71
23.42
9.99
19.98
12,000
10',240
",.
I
'"
4 I
1
244
4 !
I
Variable/Hard
6,100
BPI
195
TPI
593
KB/S
2,964
RPM
10.1
ms
MFM
30
ms
70
ms
140 ms
+24V±lO%, l.6A (MAX 6.0A)
+ 5V± 5%, 4.1A (MAX 6.0A)
- 5V± 5% .
or -7V"-16V' O.5A
8.5" x 4.4" x 14.0"
(217mm x 111mm x 356mm)
OD ~20Omm ID ~10Omm
14 Ibs : (6.3 kg)
4
8
8
* Format based on 40 sectors/track.
- 3 - .
-r=-"

3.2 Reliability
(1) MTBF
MIBF is defin~d as follows:
MIBF c operating time/number of malfunctions in the unit.
The operating time refers to time during which the power is
turned on (maintenance time is excluded). Malfunctions in
the unit refer to those that require repair, adjustment, or
replacement. Ualfunctions caused by operator errors, power
supply troubles, troubles in the controller or cables, and
other environment problems not related to the device itself
are excluded.
The MTBF of the M2301A/M2302A MDD is 10,000 hours (design
value) •
(2) MTTR
MTTR is the average time taken by a well-trained service
technician to diagnose and repair a unit malfunction. The
M2301A/M2302A is designed for an MTTR of 30 minutes or less.
(3) Service Life
Overhaul of M2301A/M2302A MDD is not required for five
years or 20,000 hours of operation.
(4) Power Loss
Integrity of the data on the disk is guaranteed against all
forms of abnormal DC power loss. (Data is not assured during
a ¥."I'ite operation):
- 4 -

3.3 Error Rate
Errors detected upon initialization and replaced by an alternate
record are not included in the error rate.
(1) Recoverable error rate
A recoverable error is one which can be read correctly within
one retry command and should not exceed one per 10
10
bits.
(2) Non-recoverable error rate
Errors that cannot be recovered wlthin 16 retries are inc1udec
in the MTBF.
(3) Positioning error rate
The rate of positioning errors recoverable by one retry is
one error ~~ less per 106 seeks.
(4) Media error
(a) No defects at HO and HI areas on cylinder 000 .
• ~ (b) The number of defective sectors in the M2301A/M2302A
(40-sector format) are as follows:
M230lA
M2302A
maximum 20
maximum 40
- 5

3.4 Positioning Time
(ms)
150
C1i
e
~
100
£-4
oc
s::
~
~
0
50
~
.....
~
C/j
0
~
100 200 240
(cyl)
Distance
3.5 Start and Stop Time
When the drive is powered down. dynamic braking is used to
minimize wear on disks and heads. Start time (time from when
power is turned on until unit is ready) and stop time ( time
to completely stop when power is turned off) are 20 seconds
or less each.
3.6 Environmental Conditions
Temperature
Relative
humidity
Vibration
Operating
Non-operating
Gradient
Operating
Non-operating
Operating
Non-operating
(polJer-off state
after installation)
During transporta-
tion and storage
- 6 -
41° to l13
0F
(SoC to 4SoC)
-40°F to 140°F (-40°C to 60°C)
lscC/H or less
20~' ,.~ 80~ RH
5~' '\, 95% RE
Moisture must not condense.
O.2G (3'V 60H2 t except
resonance condition~)
2min. x 3J cvcJ~~
0.4G (~60Hz)
2 min. x 30 cycles
(sinusoidal)
3G