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Содержание Q2000

Страница 1: ...ounRlum OEM MANUAL Q2000 8 Media Fixed Disk Drive...

Страница 2: ...QUANTUM CORPORATION 2150 Bering Drive San Jose CA 95131 408 262 1100 Publication PIN 81 40184...

Страница 3: ...characteristics of the Q2000 Series Rigid Disk Drive required by customers who purchase it as an OEM device It contains timing electrical and mechanical specifications and recommend ed circuitry neces...

Страница 4: ......

Страница 5: ...e Compensation Servo 6 2 6 Air Filtration System 8 3 0 Functional Operations 9 3 1 Power Sequencing 9 3 2 Drive Selection 9 3 3 Track Accessing 9 3 4 Head Selection 10 3 5 Read Operation 10 3 6 Write...

Страница 6: ...G ap 3 32 10 1 4 Gap 4 32 10 2 Write Precompensation 32 11 0 Installation Instruction 35 11 1 Required Tools 35 11 2 Unpacking Instructions 35 11 3 Motor Locking Clip Disengagement 35 11 4 Actuator Lo...

Страница 7: ...Dimensions and Connector Location J1 Connector Dimensions J2 Connector Dimensions J5 Connector J4 Connector Track Format Motor Locking Clip Location Actuator Lock PCB Jumper Locations Typical Quantum...

Страница 8: ...Quantum s new Q2000 8 inch fixed disk drive compatible with industry standard Shugart Associates SA1000 Figure 1 Q2000 Series Rigid Disk Drive v...

Страница 9: ...nd disks is provid ed by an impact resistant plastic and aluminum enclosure A self contained recir culation system supplies clean air through a 0 3 micron filter with another absolute filter allowing...

Страница 10: ...ransfer rate Shugart SA1000 interface compatible Microprocessor controlled temperature compensation servo 1 2 SPECIFICATION SUMMARY 1 2 1 Physical Specifications ENVIRONMENTAL LIMITS 2 Ambient tempera...

Страница 11: ...ng Density 6600 bpi Flux Density 6600 fci Track Density 345 tpi Cylinders 512 Tracks 1024 R W Heads 2 Disks 1 Index 1 Q2020 21 33Mb 5 33Mb 10 4OKb 16 80Mb 4 20Mb 8 20Kb 256 Bytes 32 4 34Mbits sec 15 m...

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Страница 13: ...ia Perform diagnostics on the head posi tioning and servo systems 2 2 Read Write And Control Electronics The electronics for the drive are packaged on two printed circuit boards the control PCB and th...

Страница 14: ...istance The motor is of simple construction con sisting of a ring magnet two flat plate pole pieces a single plane moving coil and two bearings This system is faster than stepper motors and its perfor...

Страница 15: ...OPTICAL TRANSDUCER TRANSDUCER PCB COUNTERBALANCE ACTUATOR ARM HEAD ROTOR COIL 2 PHASE BonOM POLE PIECE TOP POLE PIECE CRASH STOP Figure 3 Head Positioning Mechanism 7...

Страница 16: ...e uses an integral recirculatory air system with an ab solute 0 3 micron filter to maintain a clean environment A separate absolute filter is mounted in the bubble at the lowest pressure area in the s...

Страница 17: ...er mined for track 508 Store this difference value in memory 7 Repeat steps 5 and 6 for tracks 384 320 256 192 128 64 and O This procedure has established eight zones each with its own thermal compens...

Страница 18: ...line will cause steps to be in ward while a false level will cause steps out ward toward track o 3 4 Head Selection Any of the 8 possible heads may be selected by placing that head s appropriate binar...

Страница 19: ...he data transfer signals are differential in nature They provide data and clocking either to or from the drive via the J2 P2 Connector 5 1 Control Input Lines The control input signals are of two type...

Страница 20: ...0us See Figure 6 for normal step mode timing 5 1 3 2 Buffered Step Mode In this mode of operation the step pulses are received at a high rate and buffered into a counter After the last pulse the R W...

Страница 21: ...I r P1 J1 I DRIVE 3 P2 J2 I Q P5 J5 P4 J4 ______________ J I r P1 J1 DRIVE 4 P2 J2 Q P5 J5 P4 J4 P DC J T VOLTAGES RADIAL AC SUPPLY TERMINATION NETWORK REMOVED Figure 5 Typical Multiple Drive Connect...

Страница 22: ...j 26 Drive Select 1 27 28 Drive Select 2 29 30 Drive Select 3 31 32 Drive Select 4 33 34 Direction In 35 36 Step 37 38 NA 39 40 Write Gate 41 42 Track 000 43 44 Write Fault 45 46 NA 47 48 NA 49 50 NA...

Страница 23: ...ffered Step Mode Timing VOLTAGE GROUND Pin 1 24 Volts DC Pin 2 24 Volt Return Pin 2 7 to 16 Pin 3 7 to 16 5 OPT Volts 5 OPT Volt Return Pin 5 5 Volts Pin 6 5 Volt Return Tabla II P5 DC Connector Pin A...

Страница 24: ...ISTED PAIR DRIVE SELECT 2 28 20 FT MAX DRIVE SELECT 3 31 30 DRIVE SELECT 4 33 32 DIRECTION IN 35 34 37 STEP 36 39 NA 38 41 WRITE GATE 40 43 TRACK 000 42 WRITE FAULT 44 45 NA 47 46 49 NA 48 NA 50 6 LOG...

Страница 25: ...PAIR 20 FT MAX DRIVE SELECTED GND 1 SPARE 3 GND 5 SPARE GND 7 TlMING ClK 9 TIMING ClK GND 10 GND MFM WRITE DATA MFM WRITE DATA 13 14 GND MFM READ DATA 17 MFM READ DATA GND 18 GND TABLE V J2 Interface...

Страница 26: ...s high false the higher value of Write Cur rent is selected for writing A 220 330 ohm resistor pack allows for line termination 5 1 7 Rezero PCB Option When this interface signal is low true 50 micros...

Страница 27: ...all reading writing and seeking are inhibited at the drive and the R W heads are automatically positioned at the landing zone innermost disk radius READY will be true after the drive is 90 1 up to spe...

Страница 28: ...TE DATA as required at the interface The actual occurrence of the flux reversals may differ due to write pre compensation 5 3 2 MFM Read Data The data recovered by reading a pre recorded track is tran...

Страница 29: ...ECT 1 _______________________ HEAD SELECT 1 _______________________ 20 us MAX 1 t MFM VALID READ DATA I WRITE GATE I 1 50 ns TYP I BIT CELL 230 ns TYP I WRITE REF Figure 12 MFM Read Data Timing I I 20...

Страница 30: ...22...

Страница 31: ...ion the Spindle must be spinning at normal speed if AC and DC are switched on at the same time seeking action will not oc cur until spindle is up to speed No AC or DC power sequencing is required AC P...

Страница 32: ...24...

Страница 33: ...AC and DC power for operation The AC power is used for the drive motor and the DC is used for the elec tronics and actuator 7 1 AC Power AC power to the drive is via J4 P4 The voltage frequency and c...

Страница 34: ...d voltages and curent requirements are given in Table VIII DC VOLTAGE 24 2 4V 1V p p MAX RIPPLE 5 O 25V 50mV p p MAX RIPPLE 17 to 16V 5 O 25V OPT 50mV p p MAX RIPPLE CURRENT STEADY OR SEEKING MAX TYP...

Страница 35: ...9 0 Physical Interface Electrical interface between the Q2000 and the host system is through four connectors the first connector J1 provides control signals for the drive the second connector J2 prov...

Страница 36: ...and the fourth connec tor 14 provides for AC power and frame ground Refer to Figure 15 for connector locations J2 SIGNAL J4 AC POWER All dimensions in inches 14 00 J5 DC POWER Figure 15 Mechanical Di...

Страница 37: ...r P2 is Scotch flex ribbon connector PIN 3461 0001 A key slot is provided between pins 4 and 6 _11 036 004 r 2 400 010 4S0 010 I 20 1 11 050 NOM 063 NOM j 050NOM I 100NOM 1 095 005 BOARD THICKNESS 062...

Страница 38: ...30...

Страница 39: ...only used on 8 inch floppy disk drives The encoding method used here is modified frequency modulation MFM In the example shown Figure 20 each track is divided into 32 sectors Each sector has a data fi...

Страница 40: ...tered in dex and continues writing a fixed number of ID fields These fields must be written prior to the next index 10 2 Write Precompensatlon Whenever two bits are written in close prox imity to each...

Страница 41: ...NONE ON TIME CLOCK NONE ON TIME DATA EARLY LATE DATA NONE NO CLOCK OR DATA WRITTEN NONE NO CLOCK OR DATA WRITTEN LATE EARLY DATA NONE ON TIME DATA Table IX The write data bits are shifted through a 4...

Страница 42: ...34...

Страница 43: ...t drive down on its printed circuit board 11 3 Motor Locking Clip Disengagement a Stand drive on edge to unlock drive motor See Figure 21 b Loosen 11 32 inch hex nut c Rotate locking clip away from pu...

Страница 44: ...han 4 this trace may be cut and a wire added from B to the desired pin T1 T5 These options are not for customer use They are used for factory test only 36 11 6 Control Line Termination If drive is the...

Страница 45: ...3 il c o TP8 i TP9 4 a 1 1 B 0 00 0 OJ DO C 5 GND C B A c 3 0 CD 6 gT5 r OO 051 DO 052 0 0 DO 053 0 DO 054 TP10 I 00 A 7 o E3 l gg rh E4 0 L 8 TPll g a a DJ4 TP13 TP12 9 J5 0 o TP15 TP14 r a I I TP16...

Страница 46: ...38...

Страница 47: ...one side of a disk in the drive Surface 0 is the area of a disk where read write head 0 writes and reads data See Figure 24 D Track A track is a ring of constant radius on the surface of a disk where...

Страница 48: ...rives means many things Rigid disk drives utilizing Win chester Technology use continuously loaded low mass high compliant head assemblies These heads fly over the surface of the plat ter at a height...

Страница 49: ...EAD 5 TRACK MAGNETIC MEDIA COATING Figure 24 Typical Quantum Disk Drive Organization and Terminology Figure 25 Data Area and Landing Zone SHIPPING AND LANDING ZONE RADIUS 2 050 TRACK 511 RADIUS 2 155...

Страница 50: ...42...

Страница 51: ...ition Of An Error An error is any discrepancy between recovered data and true correctly recorded data There can be an extra bit or a missing bit i e a zero can be transformed into one or a one can be...

Страница 52: ...s in length Additionally cylinder 000 is guaranteed to be error free Error Acceptance Criteria There will be no more than 12 tracks with defects per surface of which no more than 4 tracks will contain...

Страница 53: ...ection Index POWER VOLTAGE AND FREQUENCY 110VAC 60 Hz 110VAC 50 Hz 220VAC 60 Hz 220VAC 50 Hz 2 Accessories a Signal Cable Connector Kit PIN 7340157 b DC Power Connector Kit PIN 7340158 c AC Power Conn...

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