DEC RK05 User Manual

R

K05

disk drive

(

user's

manual

(

1-

L...-

---

--

digital

equipment corp

oratio

n·

maynard.

massachusetts---

------J

R

K05

disk

drive

user's

EK-RKOS-OP-OOI

manual

digital

equipment

corporation.

maynard,

massachusetts

1st Edition, November 1976

The material purposes and

in this manual

is

subject

is

for informational

to

change without notice.

Digital Equipment Corporation assumes sibility for any errors which may appear manual.

Printed in U.s.A.

The following are trademarks

of

Digital Equipment

Corporation, Maynard, Massachusetts:

no

respon·

in this

DEC DECCOMM DECsystem·l0 DECSYSTEM·20

DECtape DECUS DIGITAL MASS

BUS

PDP

RSTS TYPESET·8 TYPESET-II UNIBUS

CONTENTS

Page

CHAPTER 1

1.1

1.2

1.3

1.

4

1.5

1.5.1

1.5.2

1.5.3

1.5.4

1.5.5

1.5.6

1.5.7

1.5.8

CHAPTER 2

2.1

2.2

2.3

2.4

2.5

2.5.1

2.5.2

GENERAL INFORMATION INTRODUCTION

WARRANTY SPECIFICATIONS 50/60

Hz POWER OPTION

MAJOR ASSEMBLIES AND SYSTEMS

Controls Spindle and Drive

Linear Cartridge-Handling Logic Assembly Air Power Supply Read/Write Heads

INST ALLA TION UNPACKING AND INSPECTION

MECHANICAL INSTALLATION AND CHECKOUT . CARTRIDGE HANDLING PRACTICES AND PRECAUTIONS CARTRIDGE PACKING NORMAL OPERATING PROCEDURES

Cartridge Cartridge Unloading

and Indicators

Positioner .

System .

Loading

..

. .

System

...

AND SHIPPING

..............

..

. .

I-I I-I I-I I-I I-I

14 14 14 14

1-4

14 14 14

.

2-1 2-3 2-6 2-6 2-7 2-7 2-7

CHAPTER 3

3.1

3.2

3.2.1

3.2.2

3.2.3

3.2.4

3.2.5

3.2.6

3.2.7

3.2.8

3.2.9

3.2.10

3.3

3.3.1

3.3.2

3.3.3

3.3.4

3.3.5

3.3.6

3.3 .7

3.3.8

3.3.9

INTERFACE GENERAL .

INPUT

OUTPUT INTERFACE LINES

INTERFACE LINES RKII-D Select Cylinder Address (8 lines) Strobe Head Select Write Protect Set Write Data and Clock Write Gate Restore Read Gate

File Ready (Drive Ready) Read, Write, or Address Accepted Address Invalid (Logic Address Interlock) Seek Incomplete . . Write Protect Write Check Read Data Read

...

(4

lines)

..

(RTZ)

Clock

. .

..

.

..

. .

..

.

...

.

...

..

. . .

....

.

Seek Ready/On Cylinder

...

....

Status

....

3-1 3-1 3-1 3-1 3-1 3-1 3-3 3-3 3-3 3-3 3-3

3-3 3-3 3-3 3-3

.

3-3 3-3 3-3 3-3 3-3

34 34

iii

CONTENTS (Cont)

Page

3.3.10

3.3.11

3.3.12

3.3.13

3.3.14

3.3.15

APPENDIX A

Figure No.

1·1

1·2

1·3 14 1·5

1·6

1-7 1-8 2·1 2·2 2-3 24 3-1

Address (4 lines)

Sector Sector Pulse

Index Pulse ACLow DC

Low

High

Density/RK05 L

THE

RK05-TA OFF-LINE TESTER

Title

....

nONS

. .

ILLUSTRA

Location Controls Spindle and Drive System Linear Positioner

Cartridge Handling System

Air System Head Loading Relationship

Shipping Bracket and Shipping Strap Location

RKIIC

Chassis Slide Mounting

, RK8/E Interface Cable Installation

Controller/RK05 Disk Drive Interface Lines and Pin Assignments

of

Major Assemblies and Systems

and Indicators

....

or

RKIID

.......

.....

of

Disk Head, Disk, and Contaminants

Interface Cable Installation

. .

...........

34 34 34 34 34 34

Page

1·3

1·6

1·7

1·7 1·8

1·9 1·9

1-10

2·2 2·3 24 2·5

3·2

Table No.

I-I 1-2

Performance SpeCifications Controls and Indicators

TABLES

Title

iv

Page

1·2 1·5

CHAPTER

1

1.1 INTRODUCTION

The RK05 Disk Drive, which

by Digital Equipment Corporation, is a self-contained, random-access, data storage device suited for use in small data acquisition systems, terminals, and applications. Operational power for this device is provided by a power supply located within the drive cabinet. The

RK05 is available in four models, each a different power line.

This compact, lightweight drive uses a high-density, single-disk, 12-sector or 16-sector cartridge

medium. Two movable heads, one flying above the rotating disk surface and one below, can read data tracks at 1500 rpm. The double-frequency, nonretum-to-zero (NRZ) recording method used in this drive can store up formatting is governed entirely

the

With eight RK05 Disk Drives (depending on the type can be controller bus.

address select logic contained in each drive,

"daisy-chained" and operated from a single

to

is

designed and manufactured

that

is

especially well

or

medium-size computer systems,

other

of

which operates

as

or

record

25 million bits

of

on-line data . Data

by the operating system.

storage

on

its storage

up

to

406

up

to

of

system)

GENERAL

50/60

1.4 The RK05 Disk Drive power models:

Each model is shipped with a complete set change from spindle drive pulley, and the

l.S

MAJOR ASSEMBLIES AND SYSTEMS The RK05 Disk Drive assemblies and systems:

Hz POWER OPTION

RK05-AA

•

RK05-AB

•

RK05-BA

•

RK05-BB

•

50

Controls and Indicators

•

Spindle and Drive System

•

INFORMATION

is

available

95

to

130 Vac @ 60

to

260 Vac @

190

95

to

130 Vac @ 50

to

260 Vac @ 50

190

to

60

Hz

operation requires a different

motor

must

is

composed

of

in

the following four

Hz

60

Hz

of

drawing

be moved.

the following ma

s.

To

jor

1.2 WARRANTY "Removable media involve use, handling and maintenance

which are beyond DEC's direct control. responsibility for performance operated with media with media approved by DEC. DEC shall the Equipment

1.3 SPECIFICATIONS

Table I-I lists the performance specifications Disk Drive for the 12-sector cartridge. Wherever applicable, a second specification pertaining also listed.

not

maintained in accordance with procedures

or

to

media resulting from such operation."

of

the Equipment when

meeting DEC specifications

not

be liable for damages

to

a 16-sector cartridge

DEC

of

disclaims

or

to

the RK05

Linear Positioner

•

Cartridge Handling System

•

Logic Assembly

•

Air System

•

Power Supply

•

Read/Write Heads

•

Figure I-I illustrates the locations, and the subsequent

of

paragraphs describe the functions

is

assemblies and systems.

I-I

each

of

the major

Table

1-1

Performance Specifications

Characteristic

Storage Medium

Type Disk Diameter

Magnetic Heads

Number

Recording Density and Format

Density Tracks Cylinders Sectors (records)

Bit Capacities

(unformatted)· Per Disk Per Inch Per Cylinder Per Track Per

Sector

Access Times

Disk Rotation Average Latency Head Positioning

(including settling time)

Transfer·

Bit

Transfer Code Transfer Rate

Specification

Single disk magnetic cartridge 14 in.

Two

2200 bpi max. 406

(200

203

(two

tracks each)

4872 (12 per revolution)/6496

plus 3 spares on each side

of

the disk)

(16

per revolution)

25 million 2040 (max. at inner track) 115,200 57,600 4,800/3,844

1500 ± 30 rpm 20 ms (half

rotation) 10 ms - for adjacent tracks 50 ms - average

~

85 ms

for 200 track movement

Double frequency, nonreturn-to-zero recording

1.44M bits per sec

Electrical Requirements

Voltage Power Starting Current

Model Designation

RK05-AA RK05-AB RK05-BA RK05-BB

Environment

Ambient Temperature Relative Humidity Barometric Pressure Temperature, Change Rate Temperature, Interchangeable Range

Dimensions

and

Weight Width Depth Height Weight

.Some

RKII-D

systems

record

at

I.S4M

bits/sec

which

115/230 250

VA

Vac @

50/60

Power only: 1.8 A

Start spindle:

130 Vac @ 60 ± 0.5

95 to

190 to 260

95

to

130 Vac @ 50 ± 0.5

190

to

50°

to

8%

to

80% (no condensation)

lOA

Vac@60±

260 Vac @ 50 ± 0.5

110° F (10°

10,000 ft (3,000 meters) max. 10° F (6° C) per hr

30° F (17° C)

19

in.,( 48 cm) 26-1/2 in. (67 cm) 10-1/2 in. (27 cm) 110

Ib

(50

kg)

increases

the

bit

density

and

Hz

± .05

(for 2 sec)

Hz

0.5

Hz

to

43° C nominal)

capacity

accordingly.

Hz

1-2

MA

INTENANCE

SWITCH (S1)

POWER SUPPLY

POWER-

FAIL HEAD-RETRACTING BATTERIES

LINEAR

POSITIONER

LOGIC ASSEMBLY

READ/WRITE HEADS

ABSOLUTE AIR

FILLER

(UNDERNEATH

UNIT)

SPINDLE

CARTRIDGE AIR

DUCT

SPINDLE

CONE

SECTOR

TRANSDUCER

CARTRIDGE SUPPORT POSTS

CARTRIDGE

6858

-6

Figure

1-1

Location

of

Major Assemblies and Systems

1-3

1.5.1 Controls and Indicators The controls and indicators (Figure 1-2) required for normal cabinet. Table 1-2 describes

operation

are located

the

on

the

function

front

of

each control

the drive

or

indicator.

1.5.2 Spindle

The spindle and drive system (Figure 1-3) the

spindle, spindle drive

50/60

Hz, split-phase ac drive belt) maintained by a tension spring anchored

The spindle speed measures increases speed,

the

is

placed in

the

motor

1.5.3 Linear The linear positioner (Figure motor, positioner transducer. To move the

recording disk, dc current

bobbin-wound armature (Figure

and

Drive

is

motor,

and

the

recording disk. A

motor

transfers

to

the

spindle drive pulley. Belt tension

is

electronically tested by a circuit

the

INDEX PULSE interval. When

to

approximately 45 ms, indicating an unsafe

drive

is

cycled down.

the

LOAD position, ac power

and

the

spindle coasts

If

to

the

a halt.

torque

to

the

RUN/LOAD switch

is

rerr.oved from

Positioner

I-I)

the

carriage,

consists

the

read/write heads, and

the

read/write heads across

14)

is

of

applied

the

composed

(via

of

the

baseplate.

that

the

interval

the

linear

the

linear

to

the

linear motor. The resulting magnetic field reacts with a permanent magnet in into depending armature. This is

fastened heads, which are surface

Any carriage movement transducer, which carriage. The transducer logic the

servo logic

or

force it

of

the

to

determine

the

motor

out

upon

the

motion

to

the armature.

attached

disk.

the

to

govern

housing to either pull

of

the

permanent magnetic field,

polarity

is

of

the

is

transferred to

As

to

the

is

detected

located on

output

current applied

a result,

carriage, move across

by

the

is

used with

cylinder position

the

speed

of

carriage travel.

the

armature

the

carriage, which the

read/write

the

linear positioner

underside

the

of

the heads, and in

to

the

of

the

control

1.5.4 Cartridge-Handling System The cartridge-handling system (Figure cartridge receiver, opener, a duckbill, and normal

operation,

two

receiver lifting cams, an access

two

cartridge support posts. During

the

plastic cartridge

I -Sa) consists

is

located only

of

door

by the duckbill and support posts. The cartridge receiver merely

guides

the

cartridge

the

duckbill and

to

rotate

freely

the

disk by magnetic coupling

As

the

drive elevate coupling is opener access

the

at

inserted

contacts

door

on

front receiver the

disk

into

the

to

allow

support

door

the

into

position

posts, allowing

the

spindle. The rotating spindle drives

at

the

is

opened,

to

a slanted position and

hub

is released. When

receiver (Figure 1-5b),

rear

of

the

entry

of

the

read/write heads.

to

the

disk hub.

the

lifting cams

the

top

cover, opening

be picked

recording disk

the

disk cartridge

the

access

up

by

rotate

to

magnetic

door

the

As

the

drive front the operating position , and engages the disk hub. When position,

the and removes cartridge receiver should

door

is

closed, the cartridge is low ered

the

magnetic coupling again

the

cartridge

is

plastic case depresses the cartridge-on switch

the

no-cartridge interlock

not

hold

the

cartridge tightly.

1.5.5 Logic Assembly

The logic assembly (Figure

of

the

is

portion Three

of

disk drive, holds eight printed circuit cards.

these cards contain

read/write circuits . Two cards contain

One card is

logic. electronics with components, while

the

positioner and

the

I-I),

cable

connector

remaining

located in

the

system logic and

the

that

other

two

cards contain

interface cables and terminators.

1.5.6 Air System The air system (Figure 1-6) consists absolute filter, plenum chamber, and As

the

blower rotates, unfiltered air prefilter, where it prefiltered air and

into

the

is

then

plenum.

is

purged

circulated

From

there, absolute filter (where minute up

the

cartridge air Cooling air plenum, through

1.5.7

through

the

Power Supply

from

front

duct,

the

absolute filter

the

linear positioner. Exhaust air exits

grill

of

the

The power supply (Figure portion the

230V, 50 or 60

of

the

disk drive, furnishes all

drive. The power supply can operate

Hz

line voltage

of

the

prefilter, blower,

the

cartridge air

is

drawn

of

large dust particles. The

through

the

air passes

the

contamination

and

into

the

is

also shunted,

drive.

I-I),

located in

the

with a liS V or

input

.

1.5.8 Read/Write Heads There are Disk Drive. One head functions

recording disk and

a

mounted' unloaded, on a plastic cam block 1-7). Flat cantilever springs connect the RUN mode,

two

ramp-loaded read/write heads in

the

other

on

suspension arms

that

head-support tailpieces. When

the

positioner moves

on

the

top

the

bottom.

rest, when

of

the

suspension arms

the

drive is placed in

the

heads forward

duckbill (Figure

cylinder zero. When the entire head slider pad has passed the

edge

of

the

disk, a ramp

down

the

edge

of

the (loading) the

heads

the

heads close

"fly"

80

to surface (Figure 1-8). A film disk and the

disk. Thus, as long as

heads remain

the

head acts as a force away from

cantilever spring is a counterbalancing force toward

the

at

a relatively

disk surface.

on

the

suspension arm slides

plastic cam block,

to

the

disk surface. When loaded,

100 micro inches from

of

air (air bearing) between

disk

rotation

constant

remains

distance away from

thereby

to

in

the

operating

condition

the

. The

right rear

the

positioner servo

interfaces

the

chassis-mounted

the

duct.

through

the

logic assembly

through

the

is removed),

disk cartridge.

by

the

left rear

dc voltages for

the

RK05

surface

of

the

The heads are

the

heads are

to

the

toward

moving

the

disk

the

disk, while

the

constant

the

14

Table 1-2

Controls and Indicators

RUN/LOAD (rocker switch)

WTPROT (rocker switch spring-loaded off)

Description

Placing this switch in the RUN position (providing

a.

locks the drive front door

to

b. accelerates the disk

operating speed

c. loads the read/write heads

d. lights the

RDY indicator.

Placing this switch in the LOAD position:

a.

unloads the read/write

b.

stops the disk rotation

c.

unlocks the drive front door when the disk has stopped

d.

lights the LOAD indicator.

head~

CAUTION

Do

not

switch

operation; this results

Placing this momentary contact switch in the

to

the LOAD position during a write

in

erroneous data being recorded.

WT PROT indicator and prevents a write operation; indicator, if

that

is

lit.

that

all interlocks are safe):

PROT posistion lights the

it

also turns off the FAULT

WT

PWR (indicator) RDY (indicator)

ONCYL

(indicator)

WT

Depressing this switch in the

PROT position a second time turns

PROT indicator and allows a write operation.

is

Lights when operating power

present. Goes

Lights when:

a. the disk

is

rotating at the correct operating speed.

b. the heads are loaded.

c.

no

other

conditions are present (all interlocks safe)

or

read,

Goes off when

write operation.

the

RUN/LOAD switch is set

Lights when:

a.

the drive is in the Ready condition.

Goes

b. a seek

c.

off

during a seek

or

restore operation

is

not being performed.

the read/write heads are positioned and settled.

or

restore operation.

off

when operating power

to

LOAD.

off

is

removed.

to

prevent a seek,

the

WT

1-5

DEC RK05 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual