SyQuest S0306 User manual

SQ306RD
OEM
Manual
SyQuesi
TEe H N 0 LOG Y

TABLE OF CONTENTS
1.0 Introduction ....................................... " 4
1.1 General Description ............................... 4
1.2 Specification Summary ............................ 5
1.2.1 Physical Specifications ...................... 5
1.2.2 ReI/ability Specifications •.•.••....•.••...••.• 6
1.2.3 Performance Specifications ......•.••...•..•. 6
1.2.4 Functional Specilications ....•....•••....•... 7
2.0 Functional Characteristics .. ........ . .. ....... .... ... 7
2.1 GeneralOperation ••...•.••.•.••.......•.. '.' •. .• .. 7
2.2 ReadlWrite and Control Electronics •••.•..••.••••..• 7
2j3 Drive MechanIsms •. •.. •••. •••••. •.•. . ••. . . . . •. •. • 8
2.4 Door Mechanism ••••••.•••.•••••...•.•••....•.••••. 8
2.5 Air Filtration System ••.•••••.••.•.•.•..••.•.•••••.• 9
2.6 Positioning Mechanism ....................... :..... 9
2.7 ReadlWrlle Heads and Discs •• •. . •. •• . •••. . . . •••• . . 9
2.8 Cartridge Interlock Mechanism (SQ306R Model) •••••• 9
3.0 Functional Operations .. ...... ........... .. .... .. . ... 14
3.1 Power Sequencing ••••••••••••••••••.••.•••..•••.• 14
3.2 Drive Selection •• ••• •••••••••••. •••. . ••. .. •. •. •. •• 15
3.3 Track Accessing " ••••••••. ••••••. . . .•.. . . .. ••.••• 15
3.4 Recallbrale •••••..•.•••••••.•••.•.•.•.....••.••.•• 15
4.0 Electrlcallnterface ................................... 16
4.1 Control Input Lines •••..••.........•...•.•••••.•••. 21
4.1.1 Write Gate •••.. •. •. . .. •. ••. . .•. •• •••••. •. •• 22
4.1.2 Head Select 20 ••••••••••••••••• , ., • • •• • •• • • 22
4.1.3 Direction In •. . •••. ••••. •. •. •. .. •. . . . .••. . •• 23
4.1.4 Step ••.•..•••••.••..••.•.•••..••...•....... 23
4.1.5 Drive Select 1-4 ••••.•.••.••....•.........•. 25
4.1.6 Change Cartridge ........................... 25
4.2 Control Output Lines ••••.•.•••.•••.......•..•..•.. 26
4.2.1 Seek Complete
26.
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4.2.2 Track 0 .. . . . . . .. .. . . .. . . .. . .. .•. . •. . . . . .•. • 26
4.2.3 Write Fault ...........••....•.•.•••......... 27·
4.2.4 Index ......•......•...•...•.......••.••...• 27
4.2.5 Ready ......•.•.....••.•.....••....•.••••.. 28
4.2,6 Drive Selected .•.....•.••......••.••.•.•.••. 28
4.2.7 .Cartridge In .••....•.•......•.....••..•..•.. 28
4.2.8 Write Protected .•....•..•.•.•...••••.••.••.• 28
4.2.9 Cartridge Changed .......................... 28
4.2.10 Radial Index ••..•..••.•.....••...•..•.•.••.. 28
4.3 Data Transfer Lines ...........••...•••••.••..•...•• 29
4.3.1 MFM Write Data ••...•.•..•••••••..••.••••.• 29
4.3.2 MFM Read Data ....•••••...••.•.......••••• 30
4.3.3 Read/Write Timing ...•......•......•.•...... 30
4.4 Drive Selected .•......•..•.•..•..••••..•••.•••.••. 31
4.5 Option Shunt Block .................. • .. . .. ...... • 31
5.0 Physlcallnlerface .....•.............................. 32
5.1 Jl/Pl Connector-Control Signals .•.•.•.•.•••.•.•..• 32
5.2 J2/P2 Connector-Data Signals ...................... 33
5.3 J3/P3 Connector-DC Power ........................ 34
6.0 Physical Speclflcallons ...................... :........ 35
6.1 Mounting Orientation .............................. 35
6.2 Mounting Holes .• . •. . . .. . .. . . .•. . •. . .•• ••. ••. •.•• 35
6.3 Physical Dimensions ....••...•.• ••. •••••. . . .•. ••. • 35
6.4 Shipping nequlrement .....•..•...••.••••••..•.•.•• 35
7.0 Track Formal .. . . . . . . . •. . . •. . ••. . . ••. . •. •••• •. . • . . . . . 35
7.1 Gap 1 .............••...........•.••..•..•.......• 39
7.2 Gap 2
7.3 Gap 3
39
39
7.4 Gap 4 ..............•..•.•...•.....•.•••••..•....• 39
7.5 Sector Interleaving .......•......••.......•..•....• 40
7.6 Defective Sector Flags .......•....•......•.•.....•. 40
8.0
Cartridge Accllmallzallon ......... . . . . . . . . . . . . . . . . . . . . 40
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Figures
1A Air Filtration System with Switch Locations ......... 10
1B Cartridge Insertion •.•..••...•........•........... , 11
1C Cartridge Removal ............................... 12
2 Track Format and Positioning Mechanism ..•....•... 13
3 Power Up Sequence •••.•...•..••................. 16
4 Control Signals ••••••..•..•...•.........••....... 17
5 Data Signals ••••.•••••••.••..•••........•••...... 18
6 Typical Connection, 4 Drive System •...•.•.•.•.•... 19
7 Control Signals Driver/Receiver Combination .. . .. . . 22
8A Slow
Seek Timing •••.••••••••••.•......••••.•.•.. 24
8B Buffered Seek •••••••••••••••. •••••. . .•••••.. . . •. 25
9 Index Timing ••••. ••••••. ••••. •.. ••. •••••. . •. •••. 27
10 Data Une/Driver/Receiver Combination •••.•.•. :. . . . • 29
l1A Read/Write Data Timings .......................... 30
11B Option Shunt Block .............................. 31
12 Interface Connector Physical Locations ••••.•..•••.• 32
13 J1 Connector Dimensions ......................... 33
14 J2 Connector Dimensions ......................... .33
15 J3 Connector-Drive PCB Solder Side ••..••••.....•. 34
16 Mounting Physical Dimensions .•.... •. . ••••. •. . •. • 36
17 Dimensional View •••••••.•.•••.•••.••.••..•.•...• 36
18 Track Format as Shipped .......................... 38
19 "A1" Address Mark Byte .... ...................... 38
Tables ,
JlIP1 Connector Pin Assignments ••••••.••.•.•..••• 20
II J2/P2 Connector Pin Assignments
............•..... 20
III J3/P3 DC Connector Pin Assignments
.• :........... 21
IV DC Power Requirements •••••••....•...••••.......• 37
V MotorStart Current Requirements ....•.......•.•... 37
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1.0 Introducllon
1.1 General Description
The S0306 disc drives are random access storage devices
utilizing removable or fixed 100mm discs
as storage media.
Each disc surface employs one movable head
10 service 306
data tracks. The tolal formalled capacityofthe twoheads and
surfaces is 5 megabytes
(32 sectors per Irack. 256 bytes per
sector, 612 tracks).
The S0306R Model has removable media In the form
of a
cartridge; the S0306F Model has fixed media.
Low cost and unit reliability are achieved through the use ofa
band actualor and closed loop stepper head positioning
mechanism. The Inherent simplicity of mechanical construc-
tion and electronic controls permits maintenance free oper-
ation throtlohotllthe Iile of the drive. Bolh electronic PCB's
are mounted outside the head disc assembly.
Mechanical and cop'::mlnatlon protection forthe heads. actu-
ator. and discs is provided by an Impact resistant aluminum
enclosure. A self contained recirculation system supplies
clean air through a
0.3 micronfiller. The spindle and disc act as
a pump assuring adequate air flow and uniform temperalure
distribution throughout the head and disc area. The onboard
.microcomputerdoes thermalcompensation duringpowerup.
:This provides significantly greater off track margin and the
.ability to Immediately perform read and write operations after
power up with
no thermal stabilization delay.
The
S0306 electrical interface is Identical to Ihe pin-out.
<lata transfer rates, and software track/sector formats as
the Seagate ST506/412 or equivalent and Insures full compati-
bility wilh awide host of 5 W' Winchesterdisk drivecontrollers.
The half-size form factor (haU-helght) design allows two
S0306 drives to fil within the space of one minifloppy or 5W'
Winchester envelope. and the DC power requirements and
connector for the S0306 are the same
as for the Industry
slandmd minifloppy. No AC power Is required.
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KEY FEATURES
I< 6.38 Mbyte storage capacity
* Hall-height minifloppy form lactor
I< Removable cartridge media IIml requires no purge cycle
upon power-up (S0306n Model)
I< Bullered seek mode lor laster data access
I< Closed-loop servo system with imbedded digital servo lor
full cartridge interchangeability between any S0306n drive
I< SameInterface and track format as standard5 W' winchesler
* Utilizes exlsling 5\1'" winchester controllers
* Ruggedized for portable system designs
* 5.0 megabillsecond transfer role
* Same DC voltages and current as Ihe minifloppy
* Band actuatorand .9' stepper motor head positioning
1.2 Specification Summary:
1.2.1 Physical Specifications:
Environmental LImits:
Ambient Temperature
Operating:
40' 10 122'F (4' to 50'C)
Non-Operating: -14' 10 140·F (-10· 1060·C)
Max. Temperature Gradient
Operating: 18'F/hr. (10·C)
Non Operating: Below Condensation
Relative Humidity: S
10 sr::, non-condensing
Maximum Elevallon
Operating: 10,000 fl.
Non-Operating: -1000 1035,000 It.
Shock
Operating: 10G's
Non-Operating: 20G's (in shipping container)
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DC Power Requirements
+12V ± 5%@.7 amps
+5V ± 5%@.9 amps
+12V/+ 5V Maximum Ripple 50 mV Peak-Peak
Mechanical Dimensions:
Height
........................ 1.625 Inches
Width .......................... 4.8 Inches
Depth .......................... 8.0 Inches
Weight ............................ 2.4 Ibs
Shipping Weight .................... 4.3 Ibs
Cartridge Mechanical Dimensions:
Height
.. . .................... 0.43 Inches
Width ......................... 4.33 Inches
Length ........................ 4.41 Inches
Weighl
............................ 0.3 Ibs
Heat Dissipation
13 walls (45BTU/Hr) maximum
1.2.2 Reliability Specifications:
MTBF
............ 11,000 POH, typical usage
PM ......................... Not Required
MTTR
.........•............... 30 minutes
Component Design Life
•............. 5 years
Error Rates:
Soft read errors
........... 1 per 10
9 bits read
Hard read errors
......... 1 per 10
12 bits read
Seek errors
.................. 1 per 10
6 seek
Note: Error
rate performance achieved with an available
MFM data window of greater than
80 nsec.
1.2.3 Performance Specifications:
Capacity
Unformalled
Per Drive
Per Surface
Per Track
Formalled
Per Drive
Per Surface
Per Track
Per Sector
Sectors per Track
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6.38 Megabytes
3.19 Megabytes
10416 Bytes
5.0 Megabytes
2.5 Megabytes
8192 Bytes
256 Bytes
32

Transfer Rate 5.0 MlJits/sec
Access Time MIN MAxt
(Includes settling)
Track to Track
25
94
Average' 90 161
Maximum' 205
276
'using buUered seek
Average Latency 8.46ms
1.2.4
Funclfonal Speclflcalfons:
Rotalfonal speed 3547 rpm ± 1%
Recording density 12000 bpi max
Flux density
12000 fcl
Track density
435tpi
Cylinders 306
Tracks 612
RIW Heads 2
Discs 1
Index
tACCESS TIMES
To guarantee 100% Interchangeability of cartridges between
drives, the 306R Model uses a
ur 'que Imbedded digital servo
scheme (Dlgilok'·).This results in a variance of access limes
which Insures the customers data integrity.
2.0 Functional Characteristics
2.1 General Operalfon:
TheS0306discdrive consists ofread/write, servo, and control
electronics, read/write heads, track positioning actuator, and
air filtrallon system. The Model S0306R also
has a cartridge
Interlock mechanism. The components perform the following
functions:
1. Interpret and generate control signals
2. Poslton the heads over the desired track
3. Read and write data
4. Provide cartridge Interchangeability for S0306R Model
2.2 Read/Write and Control Electronics
Electronics are packaged on two printed circuit boards. The
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primary board to which power, control and dala signals are
connected Includes:
1. Index detecllon circuit
2. Head position/actuator circuit
3. Read/write circuits
4. Drive up to speed detector
5. Head select circuit
6. Write 'ault detection circuits
7. Servo decoder and control
8. Stepper motordrive circuit
9. Drive select circuit
10. Track zero detector
The second PCB, mounted at the rear
of the drive derives Its
power 'rom the primary board and provides powerand speed
control
to the spindle drive motor.
2.3 Drive Mechanism
A brushless DC drive motor rotates the spindle at 3547 rpm.
The spindle
Is drivendirectlywith nobelt or pulleybeing used.
The motor and spindle are dynamicallybalanced to Insure a
low vibration level. Dynamic braking (306R only)
Is used to
quickly stop the spindle
motor when power Is removed. The
head/disc assembly
Is shock mounted to minimizetransmis-
sion of vibration through the chassis or frame.
2.4 Door Mechanism (S0306R Model only)
The S0306R
door mechanism Is shown In Figure 1 C. The
opening sequence
Is as follows:
1. Depress front panel switch. This cuts off 12 volts of power
to the spindle motor while the microprocessor moves the
heads to track
000 positon and cuts off power to stepper.
2. Front door automatically opens partially.
3. Walt until front panel light stops flashing, and manually
open
door to right angle position with 'ront opening. Car-
riage then moves to retract position
at outerdiameter, the
heads unload and the cartridge Is lifted off the spindle by
the cartridge guides.
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4. Depress fully opened Ironl doorand cnrhidge ejecls. Nole
Ihallhe fronl door will relum 10 righl angle posiliofl when
pressure is released.
2.5 Air Fillralion Syslem
The discs and read/wrile headsare fully enclosed inamodule
using
an inlegralrecirculallon airsyslem and absolute filler 10
malnlalnaclean environment. The lolaIairvolumeof Ihedrive
and carlridge
Is purged Ihrough the absolule filler once per
second. .
2.6 Positioning Mechanism
The read/wrHeheads
are mounledon aball bearing supported
carriage which
Is positioned by a band aclualor conllecled 10
Ihe slepper molor shall. The cfrive uses a microslepplng
slepper posilloner which sleps al 0.90 per slep Inslead of Ihe
1.8
0
of a conventional slepper. The closed-loop embedded
servo controldesign exlendsIheaccuracyofIheS0306melal
band posilloner to 75 micro-Inches. The embed~ed bursl
servoscheme, whereservocontroldataresides wilhlnasingle
wedge per track, affords users full definilion control
01 sector
formats.
2.7 Read/WrHe Heads and Discs
The recording media consists
of a single, 100mm "Ihln film"
melallic alloy plaller. The glass-like carbon overcoat thai pro-
tects the magnetic subslrale makes Ihe Ihln lihn discs Imper-
vious to environmental conlamlnents such as dusl, smoke
particles and ambient humidity,
as well as "head crashes" Ihat
could result fromloslllngorsharp movements
of an operallng
system. The carbon overcoat also eliminates Ihe need for
extended purge cycles; and coupled with the low load for-
cellow mass flying heads, permits reliable contact starVstop
operation and exceedingly high durability.
Data on each of the two disc surfaces is read by a read/write
head, each
of which accesses 306 tracks. The 50306 ulilizes
Industry standard
ferrHe heads.
2.8 Cartridge Inlerlock Mechanism (50306R Model only)
The fall-sale cartridge Inlerlock mechanism ensures proce-
dural compliance by users
as the cartridge is only perl11illed
10 be inserled in the appropriale posilion. The inlerlock
mechanism disengages the ferrile heads from the media
upon opening Ihe front door.
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