IBM 3340, 3344 Reference Manual

GA26-1619-4

File No. S370-07

Systems

Reference

Manual for

IBM 3340/3344

Disk Storage

ht

PREFACE

This publication is intended to familiarize

essing personnel with the characteristics

data proc-

of IBM

3340/3344 Disk Storage. The reader should have

prior knowledge of direct-access storage

concepts.

This publication is organized

•

INTRODUCTION

lists highlights and functions.

•

CONFIGURATIONS

by topics as follows:

—

Describes basic units

and ATTACHMENTS

Defines some possible combinations and

attachments for the

•

FEATURES

optional features available

illustrations of some combinations.

•

FORMATS

—

—

and track formats for data.

Record/Track

for capacity calculations of various

• INPUT/OUTPUT

methods,

privacy means.

access times, and identifies

3340/3344.

Describes

Describes and illustrates

both standard and

for the 3340/3344 with

Also provided are

capacity

Lists and summarizes the

charts including

—

Includes addressing

3340/3344 command set and sense

Also includes an

associated error recovery

• OPERATING

switches and indicators

error condition table

actions.

INSTRUCTIONS

associated with the

devices and

system

the

formulas

length records.

security and

byte formats.

and the

—

Describes all

and

record

—

3340/3344 Operator

suggested

instructions for data module

and loading procedures

Read Only Function.

The following

detailed

in this manual:

•

IBM System/370 Principles

No. GA22-7000.

• IBM

Order No.

•

IBM 3340 Disk

Users

•

IBM Reference Manual

Control, Order

•

IBM

Storage

•

The Data Processing

1699,

devices.

• The functional

the parent system. Order

characteristics

System

Order No. GA22-6822.

publications are recommended

information

concerning the

3348 Data Module

GA26-1625.

Storage Fixed

Guide, Order No. GA26-1632.

No. GA26-1620.

Reference Manual

Control, Order No.

defines

terms related to

characteristics

manuals

60 and System/370

13

and Power

and

Panels. Provides

the Enable/Disable

subjects covered

Operation,

of

Handling

Head Feature

Integrated

for

3830 Model

for

GA26-1617.

Glossary,

Order No.

direct-access

manual

numbers for

can be found in

Bibliography,

unloading

for

Order

Procedures,

Storage

2

GC20-

storage

applicable to

functional

the IBM

Fifth

Edition

This

publication replaces

Storage, Order

Significant

are continually

operation of IBM

Copies of this

Offices.

A form for

form

has

This manual was

Publishing,

© Copyright International

ii IBM

(July

1975)

No.

GA26-1619-3,

changes

reader's

been removed,

Department

3340/44

or additions

being

made.

equipment,

and

other IBM publications

comments

prepared

Reference Manual

and makes

Before using

send your

by

G26,

Business

Reference Manual

obsolete.

to the

contact the local IBM

is provided

comments

the IBM

San

Jose, California

Machines

specifications

this

can

at the back

General Products

IBM

for

contained in this

publication in connection

Branch

be obtained

of this

to the address

Division,

95193.

Corporation

3340

Office for

through IBM Branch

publication. If the

below.

Graphics and

1973,

1974,

Disk

publication

with the

revisions.

1975.

CONTENTS

Introduction

IBM

3340 Disk

Storage

Data Module

Defect Skipping

3344-B2/B2F Disk Storage

IBM

3340/3344 Units

IBM

3340/3344

Storage

Special Features

String

Rotational

Fixed Heads

Configurations 4

3340 Storage Without

Model 115
Model 125 (125

Storage Control and Features

Control

Switch

Devices 3

Position Sensing

3344

DDA) 4

(115

DDA)

Model 135 (IFA)

Models 135, 145,

and 168 (3830-2)

168 (ISC)

and

3340/3344

Configurations

155-11,

Models

165-11,

158,

145, 158,

Model 135 (IFA)

Models 135, 145,

and 168
and

3348 Data

IBM

Data

Data

Data

Formats

Record

(3830-2)

168 (ISC)

Module
Module

Surface

Format

155-H,

Models

Module

Types

Initialization

Format 6

165-11.

158,

145, 158,

Count Area

Area

Key

Area

Data

Track Format

Home Address

Descriptor

Track

Records

Data

Capacity

Track

Input/Output Operations

Device

Selection

Device

Address

Seek Address

Access and

Data Transfer Speed

Record (RO)

and Addressing

16
16

16

16
16

Access Motion Time

Head Selection Time

Rotational Delay 17

Transfer

Data

Data Security and Privacy

Read

Only Function 17

Protection

3

3
3

3

3

4

4

4

4
4
4

4

6

6
6

8
8

8

8

8

8

8
8

8

9

File

Verification

Seek

Error Recovery Procedure

Error Correction Function 18

Error Condition Table

Error Recovery Action

Construction of

Channel Commands

Commands

Sense

Control Commands

Restart

CCWs 18

Read Commands

Write Commands

Search Commands

Sense Data

4,

1,

Summary

0-7

Summary

and

5

Message Summary

Sense Byte

Sense Bytes

Formats

3340

Sense Byte Format 1 Summary

3344 Sense Byte Format 1 Summary 39

Sense Byte Format 4 Summary
Sense Byte Format
Sense Byte Format 6 Summary

Operating Instructions

3340 Operator

Panel

Summary

5

3344 Operator Panel

3340/3344

Power Panel 45

Machines Without String Switch Feature
Machines With String Switch Feature

Module Loading

Data

Module Unloading

Data

Read Only Function 47

Enable Read Only Function

Disable Read Only Function

Index

16

16

17

17

17

]

18

18

18

25

25

25
25

25

25

34
34
35

36

37

41

42

43

44

44
44

45
45

46

46

47

47

48

7

Contents iii

FIGURES

Figure 1.
Figure
Figure
Figure
Figure

Figure 6. Record and Track
Figure

Figure

Figure
Figure

Figure
Figure

IBM

3340/3344 Disk Storage

IFA

2.

3. ISC

4. Data Surface Track

5. Data

7.

8.

9.

10. Data

11. Error Condition Table

12.

3340/3344

3830-2

or

Module

Geometry

Track/Cylinder

Data Module

Capacities

Track/Cylinder

Module

Recovery

Action

Maximum Configuration

Capacities

Maximum

Configuration

Layout 7

Format

Capacities

Capacities

Table

-

No

-

Keys

No

-

With

-

With Keys

Keys

Keys

.

.

10

12

.

.

.... 13

14

. . 15

20

21

Sense

2

5
5

7

Commands

Control

Read

Write

Search

Sense

Formats

3340

3344

Format
Format

Format

Operator Panel,

Power

Data

Read Only

Commands

Commands

Commands

Commands

0-7

Bytes

and 5 Message

1, 4,

Sense Byte 1 Summary

Sense

Byte 1 Summary

4 Summary

5 Summary

Summary

6

Panel,

3340/3344

Module

Load/Unload

Function

Summary

3340 and

Summary

3344

26

27

29

31

33

35
36

37
39

41

42

43

44

45

46

47

iv IBM

3340/44 Reference

Manual

INTRODUCTION

The IBM 3340 Disk

access storage for IBM System/370

135, 145,

consists
storage,

155-11,

of a Model

and up to three attached

(Bl) drive units. The 3344

unit can be

substituted

on IBM System/370

Storage provides direct-

158, 165-11,

and

A2, control with dual-drive

large-capacity,

for the 3340

Models

135, 145,

165-II,and 168.

The

3340/3344 is

capacity

communication, or

disk storage

modular,

a

high-speed,

subsystem for data

general purpose

IBM 3340 DISK STORAGE

The IBM 3340 direct-access

technological

skipping.

advances: a data module and

Data Module

The sealed

disks, drive spindle,

arms. The data module

disk pack:

•

The drive

using a different

•

The heads, storage disks,

sealed inside

ination from

tive

• Reliability

data that it

Defect

Defect skipping

and following

track can

the heads no

track,

Data module capacity is not

ping and

data module cartridge

read and write

data storage capacity can

data module.

the data

outside sources

maintenance.

is improved as each

previously wrote.

Skipping

allows data

surface

a

be used except

longer need

access time is saved.

the user

is unaware of

storage

contains

has several advantages

and drive

module.

This avoids contam-

and reduces

head reads

to be stored both

defect.

for minute

All of the recording

be moved to an alternate

changed

defects.

Models

168.

dual (B2)

115,

The 3340

or single

dual-drive

B-type units

155-11,

large-

base, data

use.

introduces two

storage

heads, and access

158,

defect

over

be changed

spindle are

preven-

only the

ahead of

portions. Since

by defect

skip-

125,

disk

a

by

IBM

3344-B2/B2F

The IBM

increased

storage. Each

quantity

using

the 3340

370 Models

The

Defect skipping,

is also

IBM

The

of four

3344-B2/B2F

capacity,

of data of

fixed

media. The 3344

B-drives

135, 145,

3344-B2F contains

used

by the 3344-B2/B2F.

3340/3344 UNITS

3340/3344 disk storage is

dual-drives. The

3340 Model A2

and their

attached

The

mechanisms.

the

contains

circuits

sequencing

The

module

The

instead

tics apply

control logic.

dual-drives

3340 Model

The

Model B2 contains

all necessary

for internal

comes from

3340 Models

as a storage medium.

3344 dual-drive

of a data module.

to both

DISK

lower-cost-per-byte,

3344

a 70-megabyte

in a 3340

similiar

containing

are controlled

B contains

Model Bl contains

use,

A2, B2, and Bl use

models

storage

3344 storage capacity

and start time is not

not moved.

The

3340/3344 offers

• Start

• Average

•

• Nominal read/write

• Data module

Average

second

bytes

time

access

rotational

significant because

-

less

than 20 seconds

time

capacity

STORAGE

dual-drive

drive

stores four

155-11,

fixed head

to that used on the

input/output

two independent

Up to three additional

either one or two

two

drives. Each

electronic and power

but data control and

the A2 unit.

use fixed

The following

device types except

is 279.5 million

the following:

-

25 milliseconds

-

delay

-

rate

-

34,944,768

unit provides

times the

data module

dual drives

string on IBM

165-11,

158,

storage.

made

up

interface

by the A2 unit.

single

a

the 3348

media storage

bytes-per-drive

the storage is

10.12

milliseconds

885,000

bytes-per

or

direct access

can replace

System/

and 168.

3340,

of

a maximum

is a

drives

drive

drive;

model

supply

power

data

characteris-

that the

69,889,536

by

Introduction

1

3340-A2

3340-B1

3340-A2 (Control

IBM

CONTROL

•

Interprets

storage

•

Regulates

interfaces

•

Serializes and

•

Checks data

correction

• Furnishes status

•

Performs

storage

DRIVES

•

Responds

(controller)

•

Houses,

which has

70F)

•

Positions access

maintains

system

• Selects the head

•

Reads

•

Provides safety

tem and

and executes

control

the storage

integrity by

analysis

diagnostic

string

commands from

to

loads, filters, and

various capacities

track following

or writes data

system

and Two

macro-orders

control and disk

deserializes data

error detection

system

to the

evaluation of

drives a 3348

mechanism

with electronic

servicing

and

evaluation

Drives)

the

from

storage

error

and

the 3340/3344

3340-A2

the

module

data

(Models 35, 70,

with voice-coil

information for subsys-

and

and

servo

3340-B1

IBM

Drives), and IBM 3344 (Two Drives)

•

Responds

(controller)

• Positions

maintains

to commands

access

track following with

Drive), IBM 3340 B2

(One

from the 3340-A2

mechanism with voice-coil

electronic servo

system

• Selects head

•

Reads and

•

Provides safety

tem

3340-B1

the

drives

capacities (Models

3344-B2 and 3344-B2F: Houses,

two fixed

capacity

volumes, a total of 279.5

writes

data

and servicing

information

and system evaluation

and 3340-B2:

Houses, loads, filters, and

3348 data module(s) of various

35, 70,

media drives.

and 70F).

filters, and powers

3344 drive is equivalent

Each

and format to four logical 3348 Model 70

million bytes of data.

(Two

and

for subsys-

storage

in

Figure 1.

IBM 3340/3344

2 IBM 3340/44

Disk Storage

Reference

Manual

3340/3344 STORAGE

CONTROL AND

FEATURES

STORAGE CONTROL DEVICES

The following storage

date 3340/3344 disk storage.

•

3830 Model 2 Storage Control.

• System/370

Storage

•

System/370 Model 145 ISC.

• System/370

Models

3345

•

System/370 Model 135 Integrated

ment

(IFA).

SPECIAL

The 3340

Model

the remote

with Rotational

Storage.

The

Rotational Position Sensing is standard.

Storage is

The

the Model B2

String

The string switch feature is installed

(controller). This

be dynamically shared by two storage

The feature includes

switches allowing

storage control

control switch permitting the switches

from a 158 or 168

A2

3344 disk storage has no

3344

Switch

Models

Control (ISC).

Model 145 Storage Control Frame

FEATURES

disk storage has four

can be supplied with the

switch. All 3340 models

Position Sensing

available,

Model B2F contains fixed

does not.

or accessible by

control

158

and 168 Integrated

and 5.

3, 4,

special features. The

special features, as

but must be ordered

feature permits

interlocked

two

the string to be

each. A remote

Multiprocessor is

devices can accommo-

string switch and

can be ordered

and Fixed Head

head storage and

on the 3340-A2

the 3340 string

Enable/Disable

dedicated to either

also available.

File Attach-

Fixed Head

model.

by

to

control devices.

to be activated

Rotational

The rotational

the channel

given record after

selected.

on the

and permits

during the time required for

required record

Additional

mands are found

•

Reference Manual

Control, Order No.

• Reference Manual

Order

Fixed

The

3340 fixed

3348-70F data module

70-megabyte

addition

heads,

have zero

data

module storage,

storage under

The 3344-B2F

head

1.004

fixed

addresses

For further

usefulness

IBM

sales

Feature

Position

position sensing

connection time required

the track and

This

feature (optional on the

3344) disconnects

other channel operations

to the read/

details on RPS and its

in the following

No.

GA26-1617.

Heads

head feature

data

module contains

to the normal

500 thousand

seek

the moving heads

storage.

million

head storage is

each 3344

on

details on

to your storage

representative

Users Guide, Order

bytes of storage

time. The feature does

because an

dual-drive

In this model, both

bytes of zero seek time

associated only

the fixed head feature

Sensing

for

GA26-1620.

for

on any

access heads.

drive

or see the Fixed

(RPS) feature

to

head have been

the drive from

to

the spindle

write head.

associated

publications:

Integrated

3830-2

permits use of the

Storage

3340 drive. This

fixed heads in

With these

are available

equivalent amount

becomes

also

is

equipped

3344 drives

(see

Figures

application,

No. GA26-1632.

reduces

search for a

3340, standard

the channel

be performed

to bring the

com-

Storage

Control,

fixed

that

not increase

inaccessible.

with fixed

have

storage. This

with the

2

and

primary

and its

contact your

Head

of

3).

3340/3344 Storage

Control and Features 3

CONFIGURATIONS

various

The

divided

are

3340 units,

and

3340

listed by

3340

In some

storage

Model

The

(DDA)

attached:

model,

STORAGE

System/370

devices can

115

Model

for

3340-B2

Model 125

Model 125

The

attach one

can

Model 135

Model 135

The

for

(IFA)

string and

3340

a

3333/3330

configurations

two

into

configurations

and

units. These

3344

follow.

WITHOUT

(115DDA)

115 uses the

storage

3340-A2

a

(dual) orBl

(125DDA)

storage

drives can

control.

uses

string

(IFA)

uses the

control.

a

of 3340/3344

groups:

models, strings

be used

configurations

using a

attachment

addition to the

in

Direct Drive

Four drives

drive with

dual

(single)

the DDA

of up to

string of either

be

drive.

for

eight 3340

Integrated File

Sixteen

attached.

combination of

methods,

3344

of 3330

Attachment

can be

control,

storage

drives.

Attachment

drives,

or

3340

disk storage

only

using

and 3350

3340s.

and a

control and

two strings,

3340/3344

When the

drives

3344 requires

A

the

Only

support

CONFIGURATIONS

3344

can be

attached to

145,

135,

the 3344 dual

Model 135 (IFA)

Model

The

maximum

storage

3340/3344

Models 135, 145,

(3830-2)

Sixty-four

ISC

or

attached.

and a

attached.

Figure

tion.

units.

assigned

135 Integrated

34

of

strings to

string (see

Models 145, 158,

logical addresses

when a

path

Two

string of

short

3 shows the

Only strings

Each drive

relative to

used,

is

logical

four

155-11,

drive.

logical

attached: a

be

Figure

155-H, 158,

3340/3344

strings

of

four 3340

maximum

and

has the

the

neither 3333/3330

the same storage

addresses

158,

File Attachment

addresses.

for

165-11, and 168

allows two

This

3340 string and a

2).

165-11,

and 168

and 168 (ISC)

can be

3340/3344s,

used by a

configuration is

3340 string,

a

drives can be

3340/3344

incorporate the

2 can

hexadecimal

storage control

addresses

as shown.

nor 3350

control.

each drive.

has a

3830-2

configura-

3344

Models 135,

(3830-2)

Storage

3830*2
3836-2

four

combination.

Models 145, 158,

control

an

or

and

strings

155-H,

145,

the

for

Integrated

ISC

each

3333/3330s,

of

models

path

165-11,

158,

and

Storage

can attach

3340s,

(ISC)

168

shown

Control.

or 3350s

168

and

is either a

The

to 32

up

drives,

in

any

4 IBM 3340/44

Reference Manual

3135

IFA

Drive

No.

Drive

No.

String

3340-A2 3344

00

!

String 1

01

1

3340-A2

08

!

*

09 0A

|

1 2

Primary Addresses

02*

10
16

1C

2

3340-B2

03*

11

17

1D

3

OB OC

|

3 4

3344 3344

04* 05*

12
18

13

19

1E 1F

4

5

3340-B2

| OD OE

5 6 7

06*

14

1A

20

6 7

3340-B2

|

07*

15

1B

21

OF

Figure 2. IFA 3340/3344 Maximum Configuration

String

3340-A2

Storage
Control

Driw

i 1

00 01

No.

String

1

3340-A2

Drivi

5 1

No.

08

String 2

09

|

3340-A2

12 13

Drivi

2

i

3

No.

String 3

3340-A2

' in

1

a

18 IC 1A

(Hexidecimal

3344

02*

22

2A

03*
23

2B

addressing)

3344 3344

04* 05* 06* 07*

24

2C

25

2D

32 33 34 35

2

3

3340-B2

0A

| OB OC

2 3

3344

10* 11* 14*

20
28

21

29

4

3340-B2

4

3344

1C

38

5

OD

|

5

15* 16* 17*

1D

39

30 31 3C 3D

1

4

5 6 7

3340-B2

26

2E

36

6 7

3340-B2

OE

|

6 7

3344

1E

3A

3E

27

2F

37

OF

1F

3B
3F

Figure

3. ISC

or

*

Primary

3830-2

3340/3344 Maximum Configuration

Addresses

(Hexidecimal addressing)

Configurations

5

IBM

3348 DATA

MODULE

DATA

The 3340

storage

Model 35

3348

MODULE

models

medium.

with about 35

Model 70

and the 3348

including

The

one-half million bytes

Models 35 and

3340 drives, but the

on 3340 drives

only

the

use.

3348-70

tracks

Model 70F

3348-70F data

The

tics as

accessed by

are

fixed heads

the

The other

subject to normal

The three data modules

tics:

Capacity

Byte

track

Per
Per

cylinder

module

Per

DATA

All 3348 data modules are

tured.

written on each

the

ment bytes.

control uses the skip

defective area.

tive during

available to flag

if

for DOS).

MODULE

Home

written home

normal use, IBM

required

(DASDR and ATLAS for OS

During

TYPES

use the IBM 3348 Data

Three types are

with about 70 million bytes of storage,

Model

70F with about 70

can be freely

70

Model

that have

module has

except

the fixed

available

is

(cylinders and 6 through

access delays.

head

have the

34,944,768

INITIALIZATION

address and 8-byte

track. If a

address contains

normal operations the

displacement

If a module data area

defective tracks

Module as a

available: the 3348

million bytes

of storage, the

million bytes

under fixed heads.

exchanged on

70F can use its

been converted for

the same characteris-

that cylinders 1

heads. Data on tracks

with only

following

3348-35

8,368

100,416

initialized

descriptors (R0) are

skippable defect

the skip

bytes to bypass

utility programs are

and assign

through

rotational delay.

characteris-

3348-70,-70F

when

storage

becomes defec-

and

the

fixed heads

5

under

are

695)

8,368

100,416

69,889,536

manufac-

is found,

displace-

the

alternates

DASDI

DATA

SURFACE

The disk data

of data called

two magnetic read/

uses

tracks and one

surface of the disk

bered tracks are on one side of the

even numbered

point starts the

the even.

they

inside,

the

In

outside heads

When the

service four

and one

3348-35

form a cylinder. All odd

side of

side.

The

track geometry is the same as that of the smaller

the three disks

3348-70

data module contains four disks. The

FORMAT

surface is

tracks (see

for the

tracks are on the

odd tracks and

outside.

data module the

and those

divided into concentric bands

Figure

write heads, one for the inside

outside tracks. The recording

is divided in half.

heads are at

tracks: one

under the three inside heads

numbered tracks are on one

and the even tracks on the other

Each data surface

4).

All

dividing line and all

other. The odd index

the even index starts

given position,

a

odd, one

tracks under the three

odd

even,

num-

one

data

module with a cylinder available at each position. Odd

numbered cylinders are on the upper three surfaces

and the

single

position

cylinders can

cylinders are on the lower three. From a

even

two consecutive (even and

accessed (see Figure

be

5).

odd)

The differences between the storage media used on the

3340

data storage

units follow:

3348-35 3348-70

Data Surfaces per Module

Physical

Logical

Heads per Surface

Cylinders

Alternate 1

per Module 348

CE

Logical Cylinders

Cylinder 1 2

Physical Tracks

Cylinder 6 12

Logical Tracks per Physical

Cylinder 12 24

Logical Tracks per Logical

Cylinder 12 12

Logical Tracks per

per Physical

per Physical

Physical

2

2 2

696

1

2

2
2

Track 2 2

6 IBM 3340/44

Reference

Manual

Even

«ndex

Point

Megabytes

70

Cylinders

001.003.

005.

(heads

index

Odd

Cylinders

000.002.

004....

(heads

...

6-11)

Point

0-5)

Both

Odd

Cylinders.

follow

odd

tracks

follow

Figure

4. Data

and Even

Odd

tracks

index;

even

even

index.

Odd Cylinders

001,003,

005

(heads 6-11)

Even

000,

004

(heads 0-5)

699,

Cylinders

002,

698.

Surface

Track Layout

3348-35

3348-70

Note:

In

located

on the bottom

the

3348-70F data

*£.

surface

5V

11

module,

cylinders 001-005

of the bottom disk.

7«

10

8r

8*-

wmTQ

are

Data

Heads

Figure

5. Data

Module

Geometry

IBM

3348

Data Module 7

FORMATS

RECORD

The basic

a byte

separated by a special gap

combined to

ation. A

FORMAT

unit of

consisting

make a

record consists

information recorded by

of eight

record, the logical

Count Area

The count

on a

data areas

when

record is

the

Key

Use of the key

mer.

primary

the

record

part

Once

the length) may be
the data area

Data

The data

the

tion is organized

The

area.

(but not the length) may

the data

other area in

area contains the

specific

the record is formatted

track and

of the

reformatted.

defines the size of the

record. The

Area

area is at

used, the key area of

When

identification of the data

(such as social

security

number).

the key

area is

of the

formatted, the contents (but

altered. If

record

Area

area contains the

count and

length

Once

key areas

and arranged by

of the data area is defined by

the data area

area may be altered without

the record.

TRACK FORMAT

All tracks are

point (see

format:

or more

the records,

initially formatted

Figure

6).

Each

home address, track

data records. The records, and

are separated by gaps.

the drive is

bits. A group of bytes

is called

of count,

location

an area.

key, and data areas.

of

Areas are

unit of inform-

record

data

a

key and

count area is written

and is not

the discretion

the record

changed

of the program-

portion of the

until

contains

number, man number,

not

the key area is

also be

must

information

of the record. Data informa-

programmer.

the

is formatted, the contents

be altered.

track

descriptor record, and

The

affecting any

beginning at an index

has the

altered,

rewritten.

identified

the count

contents of

same basic

areas within

by

one

Home Address

Each track

physical location of the track (track address) and

the

condition of the track.

the

contains one home address,

Home address is the first

recorded area following an index

Specific commands

home address area:

are used for

Write Home Address and Read

Home Address. Home address

defective track. Writing home addresses is

the

flag

usually done at

Track

This record

following the home

Descriptor

ming systems, the RO count

provides the

alternate track,

of the defective track. An 8-byte

store the

Specific commands, Write RO

writing and reading the track descriptor

for

the IBM plant.

Record (RO)

is always the first record on the track

address area.

address of the alternate track. If it is an

the RO count area

number of bytes

writing and reading

is normally rewritten

field of the defective track

remaining on the track.

and Read RO, are used

Data Records

or more data records may follow the track

One

on

descriptor record (RO)

determined at

of the record are originally

Format

rewritten by

Data records, as

be formatted

organization determines

the time the count, key,

Write command. The

another Format Write

well as track descriptor records, can

with or without keys.

track. Record format is

a

written by execution of a

format of the record is

whether keys are used.

RECORD OVERFLOW

The record overflow

processing

track.

logical records that exceed the

When using

boundary limits the

function

overflow

size of the record.

provides a means of

records, the

which defines

point.

In IBM program-

proyides the address

data field is used to

and data areas

command.

Generally, file

capacity

cylinder

a

to

record.

of a

8 IBM 3340/44

Reference

Manual

TRACK

The number

track depends

equation can be

length records per

standard RO

consideration.

Equal

where:

The

lengths

the

accounted for):

Records n

Track =

CAPACITY

of records

that can be

on the record size. The

used to

space

length records _ 8,535

track C +

C(overhead/record)=

determine the

track. The home

and skip defect are taken into

KL

167 if

=

242

Key length

KL=

Data length

DL=

number of records (n) of different key and data

that can be

following equation

8,535 >

recorded on a track

(the standard RO is already

KL

C

+

£

recorded

following

number of

address and

(track capacity)

DL (bytes/record)

+

=

KL

if KL

#

must

DL

(») +

G)

i= 1

where:

C
C

=

167ifKL

=

242 if KL

=
/

on a

satisfy

equal

When RO is

be used:

Records =8,706

Track

where:

The tables

mum

sizes of n

n is all

module capacities are given

bytes and the number of

There are tables for records without keys,

records with keys. In all

address and standard record zero (KL

already accounted for.

possible values.

standard, the following formula

not

>

[KL(o)

n

£[KL(i)

=

i

=

C

-

C

shown

in Figures 7 through 10 give maxi-

equal-length records on a track where

DL(o)

+

1

167ifKL

242 if KL

Track, cylinder, and

in both the number

records.

tables,

+ C-4]

DL(i)

+

=
#

overhead for home

=

+ C]

and for

DL

0,

+

data

should

of

=

8)

is

Formats

9

Index

Home

Address

SD

1

PA

/

F

G2

/

/

CC

1

Standard

t

/

H H

1

RO Count

Area

K

R

L D L

...J,,.,

RO does not

/

DCB

Record Zero RO

G2

/

G2 Key t DCB

contain

-Track Format

A

ROKey

Area t

an RO key area

G2

1

DATA DCB

G2

or

associated

RO Data

Area

/

/

/

gap.

System

Data

I

G3<

(System/

'Storage

/

^Control)

(Disk

to

Storage

J

G3

^Control

fData

beginning of each track.

INDEX: Indicates

the disk surface are

G1 (Gap 1):

the

synchronized by

Separates

Index and

HOME ADDRESS

SD (Skip

displacement

PA (Physical Address):

verification.

Note:

ing

transparent to the using

F (Flag):

The

system.

CC

HH (Track Number):

with

DCB (Detection Code Bytes):

and

Figure 6.

Displacement): Storage

condition of track.

Storage

The SD

only the storage

Bit

Bits
Bits 6

flag byte may

(Cylinder Number): Specifies the

3348-35

For

3348-70

For

3348-

For

the selected

3348-35

For

3348-70

For

3348-70F

For

used for error

and PA bytes are

Defines track

-

Displacement

Skip

and 5

,

2,

1

4,

-

and 7

the

It is

70F

Record

control

system.

condition as

-

Unused.

=

Normal Track

00

=

Alternate

01

10=)

11

be

only

cylinder:

Defective Track

=

j

transferred to and from the

flag byte

347

to
to 695

695

to

Specifies

0-11

0-11

0-1

(cylinders

1

detection.

Track Format

and

Index.

Home Address.

control indicators

control

internal

drive. The function is

and

transferrable.

(cylinders

the read/write

Generated by

check for

conventions

follows:

Track

cylinder number:

1-5

1-5

fixed

All tracks on

using

fixed heads)

track number

heads)

3340-A2

the

for

involv-

skip

G2 (Gap

Separates home address and R0 count

2):

RECORD ZERO

COUNT

R0

SD and

F

(Flag): Defines track

records.

Bits

Bits 3 and 5

Bit

Bits 6

(Cylinder Number): Specifies

CC

For
For

For

HH (Track Number): Specifies the read/write

within the selected cylinder.

For
For

For

R (Record Number): Normally

KL (Key

key area,

has a

DL (Data Length):

data area,

normally

DCB (Detection Code Bytes):

and used for error detection.

AREA

PA:

Same as

—

0—2

-

4

When on, indicates that

the

on

and 7

Home Address.

Skip Displacement

—

Unused,

next

-

=

00

=

01

10=

11=/

3348-35
3348-70

3348-70F

3348-35
3348-70

3348-70F

Length):

from"

value of Hex

from

has a value of

to
to
to

0-1

0-1
0-1

Specifies

0—255

00.

Specifies the number of bytes in the

track capacity. For standard

1 to

condition identifier

Indicators.

bit

is always zero.

5

logical record continues

a

track.

Normal Track

Alternate

)

Track

Defective Track

the cylinder

347

695

695 (cylinders

(cylinders

1

the number of bytes in the R0

bytes. For standard

Hex

08.

1-5

1—5

value of Hex

has a

Generated

fixed heads)

fixed heads)

by

area.

for overflow

number:

number

track

00.

R0, this normally

R0

R0, this

the

3340-A2

10 IBM

3340/44

Reference Manual

System Data)

(System/

Storage

Control)

Disk

to

Storage

Controi

Data

Track

G3

^

G3

Format

R1-RnCnt

Area

K

\

\

PA

SD

I

Data

Record R1-Rn

G2

R1-Rn

Area

A

Key

G2

R1-Rn

Area

Data

Index

G4

A

K

F

CC

H H

R

L D L

I

I

I

I

DCB G2

Key

DCB

G2 DATA

DCB

G2 (Gap 2): Precedes

KEY

RO

KEY

standard RO, this

DCB (Detection

bytes are generated

detection.

G2

AREA

AREA: Identifies

area is

Code Bytes): If

(Gap

2):

Precedes

RO DATA AREA

DATA AREA:

count

and key

DCB

(Detection

and used for

DATA

RECORD

G3 (Gap

DATA

DATA

F (Flag):

CC

RECORD

RECORD

(Cylinder Number):

For

3348-35

For

3348-70

For

3348-70F

3):

Same

Contains the

areas.

Code Bytes):

error

detection and

COUNT AREA (R1-Rn)

Precedes

COUNT AREA

as Record

all key areas.

information in

not present

by the

3340-A2 and

all

data areas.

all count

Zero.

Specifies the

to 347
to 695
to

695 (cylinders

on the track.

key

area is written,

information

Generated

correction.

areas,

except RO,

cylinder

1-5

the

data area. For

used for

identified

by the

number:

fixed

heads)

these

error

by the

3340-A2

HH

(Track Number):

within the selected cylinder:

For 3348-35
For 3348-70
For

3348-70F

R

(Record

the

KL

key area,

DL

data

DCB

and used

G2

DATA

KEY

DCB

and used

G2

(Gap

DATA
DATA

the count

record

(Key

Length):

from 0-255

(Data

Length):

area, from

(Detection

for

(Gap

2): Precedes

RECORD

AREA:

(Detection

for

2):

RECORD

AREA:

and

Number):

on the

error

Identifies

error

Precedes

key

Specifies

0-11
0-11
0-11

track

Specifies

Specifies

1

to track

Code

detection.

KEY

Code

Bytes):

detection.

all

DATA

Contains

areas.

(cylinders

Specifies

if

bytes.

Bytes):

all

AREA

information

data areas.

AREA

the

the read/write

the

specified

the number

the

capacity.

Generated

key areas.

(R1-Rn)

Generated

(Rl-Rn)

information

1-5

sequential

by

programmer.

number

in

the

fixed

heads)

of bytes

of bytes in

by the

data

by

the

identified

track number

number

of

in the

the

3340-A2

area.

3340-A2

by

DCB

(Detection

and used for

G4 (Gap

Index.

defect.

4): Padding

If

Code

error detection

used for

defect

Bytes):

from

skipping,

Generated

and

end

of the

correction.

last

G4 is

centered

by the

data

3340-A2

area

to

over the

Formats

1

Record Length

(DL)

(Bytes)

8,368
4,100

2,678

1,966

1,540

1.255 6
1,052

899

781 9 7,029

686

608

Track

(Records) (Bytes) (Records)

1

2
3

4

5 7,700

7 7,364

8 7,192

10

11

544 12 6,528

489 13

442 14

402

15

366 16

335

17

307 18 5,526

282

19 5,358

259 20

239

21 5,019

220 22
204 23 4,692

188 24
174 25 4,350

161

149 27
137
127 29

117 30 3,510

26

28

108 31

99

91

84

76

32 3,168

33 3,003

34
35 2,660

70 36
63 37 2,331

57

51 39

46

41

36

•31

26
22

18
14 47 658

10

7 49
3

38

40 1,840

41 1,681 492

42 1,512
43 1,333

44
45 990

46

48

50

Capacity

8,368
8,200

8,034

7,864

7,530

6,860
6,688

6,357

6,188
6,030

5,856

5,695

5,180

4,840

4,512

4,186

4,023

3,836
3,683

3,348

2,856

2,520

2,166

1,989

Cylinder

12

Capacity

(Bytes)

100,416

24 98,400

36

96,408

48 94,368

60

92,400

72 90,360

84

88,368

96 86,304

108

120
132

144 78,336
156

168

180

192

84,348

82,320
80,256

76,284
74,256
72,360
70,272

204 68,340

216
228

66,312

64,296

240 62,160
252
264

276

60,228

58,080

56,304

288 54,144

300 52,200

312
324

336

50,232

48,276

46,032

348 44,196
360

42,120

372 40,176

384 38,016
396

408
420

36,036

34,272

31,920

432 30,240
444 27,972

456 25,992

468

23,868

480 22,080

20,172

18,144

15,996
13,728

11,880

9,936

1,144

828 552

504

516
528

540

564 7,896

480 576

5,760

343 .588 4,116

150

600 1,800

Record

IBM 3340/44

12

Figure 7.

Reference Manual

Capacities

per Track

and Cylinder

-

Without Keys

Records

MODEL

35

Bytes

MODEL

Records

70/70F

Bytes

4,176

8,352

12,528
16,704

20,880

25,056

29,232

33,408

37,584

41,760
45,936

50,112
54,288

58,464

62,640

66,816
70,992
75,168

79,344

83,520

87,696
91,872 20,21

96,048

100,224

104,400

108,576
112,752
116,928
121,104
125,280

129,456

133.632
137,808

141,984

146,160

150,336

154,512
158,688

162,864

167,040
171,216

1

75,392

1

79,568

183,744

187,920
192,096

196,272

200,448

204,624

34,944,768

34,243,200
33,549,984
32,840,064

32,155,200
31,445,280

30,752,064

30,033,792

29,353,104
28,647,360
27,929,088

27,260,928

26,546,832

25,841 ,088

25,181,280
24,454,656 133,632
23,782,320

23,076,576 1

22,375,008

21,631,680

20,959,344

,840

1

19,593,792

18,842,112

18,165,600

17,480,736 217,152

16,800,048

16,019,136

15,380,208

14,657,760
13,981,248
13,229,568 267,264

1

2,540,528 275,616

11,926,656
11,108,160
10,523,520 300,672

9,734,256 309,024 19,468,512

9,045,216 317,376
8,306,064 325,728
7,683,840 334,080
7,019,856 342,432
6,314,112
5,566,608 359,136 11,133,216

4,777,344 367,488

4,134,240

3,457,728
2,747,808 392,544 5,495,616

2,004,480 400,896 4,008,960

1,432,368 409,248

208,800 626,400

Figure

8. Record

Capacities per

8,352

16,704

25,056

33,408

41,760

50,112

58,464

66,816
75,168
83,520

91,872

100,224

108,576
116,928
125,280

141,984

50,336

158,688
167,040
175,392

183,744

192,096

200,448

208,800

225,504

233,856
242,208
250,560
258,912

283,968 23,853,312

292,320

350,784

375,840 8,268,480

384,192

417,600

Data Module

-

Without

69,889,536

68,486,400

67,099,968

65,680,128

64,310,400

62,890,560
61,504,128

60,067,584

58,706,208

57,294,720
55,858,176
54,521,856

53,093,664

51,682,176
50,362,560

48,909,312
47,564,640
46,153,152

44,750,016

43,263,360
41,918,688
40,423,680

39,187,584

37,684,224

36,331,200
34,961,472

33,600,096

32,038,272
30,760,416
29,315,520
27,962,496
26,459,136
25,081,056

22,216,320
21,047,040

18,090,432

16,612,128

1

5,367,680

14,039,712
12,628,224

9,554,688

6,915,456

2,864,736

1,252,800

Keys

Formats

13

Record

Length Track Capacity

(KL+DL)

(Bytes)

8,293

4,025

2,603

1,891

1,465
1,180

977

824
706

611

533

469 12

414

367 14
327

291

260

232

207

184 20
164
145

129
113

99
86

74

62
52

42

33

24

16

9

Cylinder

(Records)

1

2

3

4
5

6

7

8

9

10

11

13

15

16

17
18

19

21

22
23

24

25
26

27

28
29

30

31

(Bytes) (Records)

8,293 12 99,516

8,050
7,809

7,564 48 90,768

7,325

7,080
6,839

6,592

6,354

6,110

5,863

5,628

5,382
5,138

4,905
4,656

4,420

4,176

3,933

3,680

3,444
3,190

2,967

2,712

2,475 300

2,236

1,998
1,736
1,508
1,260

1,023

24

36 93,708

60 87,900

72 84,960
84 82,068
96 79,104

108

120
132

144 67,536
156 64,584

168
180

192 55,872

204
216 50,112
228
240 44,160

252 41,328

264 38,280
276 35,604

288 32,544

312 26,832
324 23,976

336 20,832
348 18,096
360

372

32 768 384 9,216
33

34

528

306

396 6,336

408 3,672

Capacity

(Bytes)

96,600

76,248

73,320
70,356

61,656

58,860

53,040

47,196

29,700

15,120

12,276

Record

9.

Figure

IBM 3340/44

14

Reference

Manual

Capacities

Track and Cylinder

per

-

With Keys

MODEL 35

Records Bytes

MODEL

Records

70/T70F

Bytes

4,176

34,631,568

8,352 33,616,800

12,528

16,704

20,880
25,056

29,232

33,408
37,584

41,760
45,936

50,112

54,288

58,464

62,640
66,816

70,992

75,168

79,344

83,520
87,696

91,872

96,048

100,224
104,400
108,576
112,752

116,928
121,104
125,280
129,456

133,632
137,808

141,984

Figure

10. Record Capacities per Data

32,610,384
31,587,264
30,589,200

29,566,080

28,559,664

27,528,192
26,534,304

25,515,360

24,483,888
23,502,528
22,475,232
21,456,288
20,483,280

19,443,456
18,457,920
17,438,976
16,424,208
15,367,680
14,382,144

13,321,440

12,390,192

11,325,312

10,335,600

9,337,536
8,343,648

7,249,536

6,297,408

5,261,760

4,272,048
3,207,168

2,204,928

1,277,856

8,352 69,263,136

16,704 67,233,600

25,056 65,220,768

33,408 63,174,528

41,760

50,112

58,464

66,816

75,168

61,178,400

59,132,160

57,119,328
55,056,384
53,068,608

83,520 51.030,720

91,872

100,224
108,576

116,928

1

25,280 40,966,560

133,632
141,984

150,336

158,688

167,040
175,392

183,744
192,096

200,448
208,800
217,152
225,504

48,967,776

47,005,056

44,950,464

42,912,576

38,886,912

36,915,840

34,877,952

32,848,416
30,735,360

28,764,288
26,642,880

24,780,384
22,650,624
20,671,200

18,675,072

16,687,296

233,856 14,499,072
242,208

250,560

12,594,816
10,523,520

258,912
267,264

i

,

275,616
283,968

Module

-

4,409,856

2,555,712

With Keys

8,544,096

6,414,336

Formats

15

INPUT/OUTPUT OPERATIONS

section contains a

This

operations used

Detailed

information

and channel

in IBM

found

No. GA22-7000.

Order

DEVICE

Device

3340 DRIVES

Drive

The

the address byte (byte

drive

Any drive

Drives to 7

and

connection

is offline, Unit

returned.

hardware

is

Note:

logic

Address

addresses

3340

addressing.

drives 8

returned.

The

board in the

with

program control

System/370 Principles

SELECTION AND

are specified in

address is specified in bits

address from hex to F can be accepted.

are attached to

to F on the

cannot be made because the required

Check (Intervention

multiple selection is detected

If

failure, Unit Check (Intervention

drive addresses must be

Operation,

of

I/O

general description of

operations is

I/O

devices.

IBM disk storage

about the central processing unit

of

ADDRESSING

the

is also used

bit 3

3);

the first controller string

second string. If a logical

drive units.

instruction.

I/O

4, 5,

Required) is

wired on a

and 7

6,

with

because of a

Required)

32

drive

of

CCHH part of count areas and

The

normally

address.

count area

corresponds

The physical address (PA) bytes in each

and home address indicate physical cylinder

bytes 2 through

to

and track addresses. The PA bytes

storage

When the seek

control, it is converted into physical cylinder and track

addresses and

operations.

3340/3344

Storage

Model

3348-35

3348-70

3348-70F

3344-B2

3344-B2F

ACCESS

control and are used for seek verification.

argument

sent

to the selected drive for Seek

received

is

The acceptable seek addresses for the

devices

are:

Data

Tracks

CC

0-347
0-695

0-695

0-11
0-11

0-

X4

AND DATA

TRANSFER SPEED

home

are written

by the storage

Alternate Tracks

HH

11 696,697

CC

348

696,697

X4

addresses

5 of the seek

by the

HH

0-11
0-11

0-11

DRIVES

3344

3344 drives, the device

For configurations

on

the

and

can have

3

storage

Address

is

each spindle. Bits

logical device (a

1 the

allows

Figure

control, only

3330 or

addressing

devices
specify

bits

addressing

String

B (see

one

a

to

controlled;

Seek

using

modified to

storage control address.

handle the

3344 drives on strings

only two

When

3).

3340/3344

3350 strings

A specific track is selected by

Seek command to the required

and a

other commands

reference manuals.

Bytes

cylinder address, and

track

and 1 are unused,

address. All seek addresses consist

are described in the ISC

bytes 2 and

bytes 4 and 5 are the logical

12 3 4

CCHH

2 through 7

maximum

multiple

of

of byte

64)

This

logical

and

and 2

units,

3340

one A2

3344 drives are

devices can be

cannot be

sending the seek address

drive. These and

and

are the logical

3

of six

5

and

attached

attached.

3830-2

bytes.

3

only.

time required for access and data

total

The

consists of

delay,

Access

Access

read/write heads to

already at the correct cylinder,

are

zero.

fixed

If the access

der, a

maximum access

average access

Head

The

negligible.

access motion, head selection,

and data transfer.

Motion Time

motion time is the time required to move the

the correct cylinder. If the heads

the

Access

heads when fixed head models are used.

time is also zero for data stored under

mechanism must move to another cylin-

minimum of

10 milliseconds is required. The

movement is 50 milliseconds, but the

time is 25 milliseconds.

Selection Time

time required to select the read/write head is

transfer

rotational

access

time is

IBM

16

3340/44

Reference Manual

Rotational

Rotational

record area to

transfer

almost a

rotational delay) is

maximum and average

The

3340/3344

Maximum

Average

Note:

feature

permitting

thereby

latency period.

Data

Delay

delay

reach the

begin. This time

can

revolution.

full

drives

rotational delay

rotational

Use

of

minimizes

the drive to

allowing

Transfer

the Rotational

Nominal read/write

Bytes-per-second

Microseconds-per-by

DATA

The

function,

File

limiting access

SECURITY AND

3340 and

Protect and Seek

3344 have a Read

conjunction with previous

in

to data

is the time

read/

Half a revolution

generally

are:

delay

the

effect

disconnect

use

other

of

rates for

=

885,000

te

Verification,

areas of the

required for the

write head so that data

can range

used for

rotational

=

20.24 milliseconds

=

10.12

Position Sensing

of

drives during a

the disk

=

1.13

from zero to

(average

timing purposes.

delays for

milliseconds

rotational delay

the

from

drives are:

PRIVACY

function. This

Only

methods

offer a means of

data module.

desired

channel,

such

by

as

3344 MODELS

In the 3344 dual-drive

tion is

for each drive.

File

controlled

Protection

Control of Write and Seek

gram can be affected by

description of the Set File

A

in the

ISC and

3830-2 reference manuals.

By entering a Set File

models, the Read

switch on the operator

by a

commands within a pro-

the Set

Mask command is given

Mask, selected Write and Seek

commands can be inhibited even

the command

Verification

Seek

The 3340/3344

count area and home address

each

PA) for

address

operations, the bytes

recent seek

nation of the

home address

check. Seek

information.

chain.

track format includes

verification. When a count area or home

seek

is processed

address. A

operation at the

check is also

during Read, Search, or Clock

are compared with the most

non-compare results in termi-

with channel

end, device

indicated in the sense

Only func-

panel

File Mask command.

though they

appear in

two bytes in

(physical address,

end of the count area or

end, and unit

Function

Only

Read

3340 MODELS

The Read Only

protecting

rewritten or erased.

Each data

handle.

before

Note:

The operator

inserting the data

This

function provides

designated data modules

module

is

insert is only

module is not on the

Instructions"

section).

When the Read Only

command addressed to

quent sense

(byte

information indicates Command

0,

bit

0)

Write Protect

and

the means

from being

equipped with

an inset in the

can change the inset

module in

accessible when

drive (see

option is made,

the drive is

the drive.

the "Operating

rejected. Subse-

(byte

for

position

the data

any Write

Reject

bit

1,

6).

Input/Output Operations 17

ERROR

RECOVERY

PROCEDURE

Error handling usually involves storage control and

system-invoked recovery actions. These recovery

actions can vary

the 3340/3344 is attached.

depending on how and

to what

system

The following topics are associated with recovery

actions involving the

controls), and

•

Error Correction

•

Error Condition Table

•

Errory Recovery Action

ERROR

the 3340/3344:

CORRECTION FUNCTION

Model

3830

Function

or ISC (storage

2,

The error correction function (ECF) is part of the

recovery action procedure. The

the related procedure are fully described in the 3830

algorithms and

ECF

Model 2 and ISC reference manuals.

ERROR CONDITION TABLE

Error

The

configurations of sense bits

in sense bytes

of these

Condition

0,

configurations in

be invoked by

Table

(Figure

set by the storage control

, and 2. In addition, it refers to each

1

a specific

the system.

identifies unique

11)

recovery action

ERROR RECOVERY ACTION

The 3340/3344

specifies actions

in the Error

recovery action is the construction of Restart Channel

Command Words 1 and 2.

Construction of Restart CCWs

If Operation Incomplete (byte

sense information, it indicates that an error or unusual

condition

data transfer had been initiated.

Restart Channel Command Words, the error recovery

procedures can correct

continue the

interruption to the normal ending point.

Recovery

to be

Condition Table

occurred during a logical operation after

operation

Action Table (Figure

taken for

the

in

error conditions

. A necessary part of the

bit

7)

1,

constructing

By

unusual condition

progress

from

is set in the

and

the

point of

12)

listed

to

RESTART

Restart CCW 1 is constructed

1

2. The

3

4. The

RESTART

Restart CCW 2 is constructed

1.

2.

CCW 1

as follows:

The command

byte 3.

data address is that of the interrupted

plus the count of that CCW, minus

count in the

The flags, except

(PCI), are

count is the residual

the residual

used. If a Write command is in progress,

address should specify

If a Read command

skip bit.

CCW

The command code is provided
The count is constructed as follows:

a. Fetch the

code byte is provided

channel status word

Program Controlled Interrupt

those of the interrupted

count in the

count is zero, a count of one must

a byte containing

is in progress, turn on the

2

as follows:

count of the CCW designated

CSW-8, and set a pointer to this CCW.

b. Subtract the restart displacement

count

obtained in step a. If this result

positive,

c. Check

go to step f ; otherwise go to step c.

the chain data flag of the

nated by the pointer. If the flag is not set,

to step e; otherwise

d. Advance

in Channel (non-TIC)

the pointer to the next non-Transfer

go to step d.

CCW in the data chain

and add the count of this CCW

of all preceding non-TIC CCWs in the data

chain. Return

Truncation occurs.

e.

count equal to 1.

skip bit in the Restart

f

Set the Restart CCW 2 count equal to the

result of

to step b.

Set the restart CCW 2

Go to step 3 and include the

CCW flags.

the subtraction in step b.

Go to Step 3.

in sense

the residual

(CSW).

CCW.

CSW. If

in sense

from the

CCW desig-

to the counts

CCW,

the

'

00

byte 3.

by

is

be

data

'

go

1 8 IBM 3340/44

Reference

Manual

The

3.

designated

is also

4. The

by

CCW,

in Step

flags

set

data

pointer

the

minus the

2.

(except

if

address is that

PCI) are those

pointer

by the

Step 2e was previously

in Step

Restart CCW

in Step

of

the

plus the count

2,

CCW

of the

2. The skip bit

executed.

designated

CCW

of that

generated

count

If another Operation Incomplete

ing the

generated

Restart CCW, a new

from the old Restart CCW.

Note: Be

CCW before

sure to avoid destroying the old

generating

Restart CCW may be

new one.

the

occurs while execut-

Restart

Error Recovery

Procedure

19

Byte

1

2

2

1

2

1

1

Bit

Operation

Track

Command

Write

Invalid

End

End

Operation

No

File

File

Operation

Environmental

Present

Name

Command

Intervention

Bus Out

Equipment

Data

Check

Overrun

Track

Condition

Check

Track

Condition

Check

Operation

Seek

Check

Data

Check

Correctable

Data Check

Correctable

Operation

Data

Check

Correctable

Condition

Check

Inhibit

Track

Format

of Cylinder

of

Cylinder

Record

Protected

Protected

Reject

Required

Parity

Check

Incomplete

Incomplete

Incomplete

Reject

Incomplete

Found

Incomplete

Data

3340/3344 Error

Programming

Drive

offline.

patability

not have

Bus

Out

such

the

parity

Equipment

Data

check

or

uncorrectable

Service

overrun

Non-home

track

or any

known

alternate

Switching

processing

overflow

Seek

reading

Correctable

the data

Correctable

segment

Correctable

segment

A

Write

in the

Track

Cylinder

operation.

Cylinder

operation.

record

incomplete

home

area of

is

(not

command

write

capacity

boundary

boundary

Programming

condition.

track.

The Seek

violated

A

Statistical

Read

command

file

or

Write

usage/error

General

error.

Not Ready, CE

as

a 3348-70F

Fixed

Head

error.

malfunction.

in

home

data check

or command

address

from

or

not the

or

multitrack

or defective

alternate track

switching

processing.

or

incorrect

address

data check

the last

data check in

last

data

check

the

last

received

inhibit

state.

exceeded.

detected

detected

error or

The

searched

or

mask.

Overflow

Condition

Description

Mode,

installed

feature.

address, count

in

data area.

overrun.

record

commands

commands

track.

during

to

a

defective

physical

or count

segment.

segment)

expected

Read/Search

log

area.

in a

non-multitrack

overflow

data area

in the

data

of

with the

during

during

programming

data

does

operation

information

Table

or

data module incom

on

a drive

area, or

switching

key area;

for

overflow

track

during

address

data area

segment.

of

overflow

area of an

an

alternate

selected

a

basic

a basic

not

multitrack

violated

drive

multitrack

overflow

exist on

file

is present.

that

a defective

from

a

record

when

overflow

track

error

that

operation

mask.

or

does

Action

1

8A

10

11

12

13

Logged

No

Yes

Yes

Yes

Yes

Yes

No

No

Yes

Yes

Yes

Yes

No

No

No

No

No

No

No

Yes

Figure

20

11. Error

IBM

Condition

Table

3340/44 Reference

Manual

3340/3344

Recovery

Action Table

Action

1 Print message 1

2

3

4

5

5A

6

Exit with programming error

Repeat

a.

b. If the

Repeat the operation.

a.

b. If the error condition persists after ten retries,

If this is

a.

b. Use

ID area

Resume operation after searching

c.

Use

a.

area of the record area.

b. Resume operation after

Issue

a.

b. Seek

Perform Action 4.

c.

Perform error correction function.

a.

Examine bit 7

b.

tion that data has been corrected. (User is

recovery action.)

If

the user's chain has

c.

of

3

7

Note:

first

Continue the user's chain by executing the following

d.

Seek (same as

Set File Mask (same as original)

Read

Search

TIC*

TIC (channel status word)

for

operator and/or customer engineer

unusual condition

or

the operation one time.

error condition persists, perform

defective track, perform Action

a

address of defective track

record count

of the

address

of alternate track in

Recalibrate command.

a

the original address.

to

plus 1 in a Seek command. The defective

area.

a

searching

of the file mask. If this bit is

Note: Only

applies with

not been completed,

this command is on (count

If

data chaining is

non-TIC CSWafter the last

Home Address (skip

ID Equal

(CCHHR provided in sense bytes

area),

indicated

CCWin the data chain.

original )t

bit

on)

-8

Action 1.

perform Action 1.

5A.

desired

to

Seek

to desired track

track position.

command.

off, go to step c.

operating in

OS/360.

examine the next non-TIC

go

step

to

the

in

interrupted CCW, the preceding

Explanation

notification.

indication.

The

alternate track

position.

PCI fetch

is off, perform

If bit

d.

CCW

8-12)

chain:

this bit

If

mode and

track

address can be

address can be

is

return to user

on,

therefore,

must,

found

found in the

the ID

in

with

indica-

supply restart

command in the user's chain. If bit

Action

7A.

test must be executed on the

Continue the user's chain by executing

Seek (same as

Set File Mask (same as original)

7A

Read

Search

TIC*

Read

Address (skip

Home

ID Equal

-8

Count (skip bit on)

TIC (channel status word)

t Cylinder bytes and the

from bits 3

Figure

1 2. Recovery Action Table

through 7 of sense byte 6.

high-order head byte

1 of

(

4)

bit

(CCHHR

the

following command chain:

original)!

on)

provided in sense bytes

are obtained from the user. The low-order head byte

8-12)

Error

is obtained

Recovery

Procedures

21

3340/3344

Recovery

Action

Table

(continued)

Action

8

8A

Perform

a.

b. Examine

tion that

action.) Note: Only

c. Increment the

user. The low-order

d. Construct Restart

e. Complete the

following

Seek

Set File

Set Sector

Search

TIC*

Restart

TIC

Note: If the

seek

a.

Perform error correction

b. Examine bit

tion that

action).

c. Use address of the defective

d. Construct

e. Complete

following

Seek

Set

Set Sector

Search

TIC*

Restart CCW

TIC

Note:

seek argument before

error correction

bit

of the

7

data has been corrected.

applies

seek argument

CCW 2.

interrupted

command chain.

Mask

ID Equal

-8

CCW 2

modified seek

argument before

of the

7

has

data

Note:

Restart CCW 2.

the interrupted operation

command chain.

File

Mask

ID

Equal

-8

If the modified

been corrected.

Only

applies

2

file mask.

head byte is

(argument from

(same

(argument

(record

(channel

issuing the seek.

function.

file

mask.

(argument from step

(same

(argument

(record

(channel status

seek argument

issuing

function.

If

this

(User is

with OS/360.

by one. Cylinder

obtained from

operation and

original)

as

0)

1)

status word)

argument is not

If

this

(User

with

OS/360.

track

plus 1 in

and continue

as original)

0)

1)

word)

the

seek. If that

Explanation

bit is off,

continue

step c)t

If

bit is off,

is operating

go to step c.

operating in PCI

bytes

bits

the user's

within

the user's extent,

that is impossible,

go to step

Seek

the

the

t

c)

is not within the

is impossible, then

If

this bit is on, return

fetch

mode and

and the

3

through

high-order

7 of

chain (if

then

IOS must perform

If

c.

this bit is

PCI

in

fetch mode

command.

user's chain (if

user's extent, then

IOS must perform

user

to

must supply restart

head

byte are obtained

sense

byte 6.

appropriate)

then

IOS must

executing

by

supply the

Action

on,return

and

must supply

appropriate) by executing

IOS must

user

to

restart recovery

supply

Action

with indica-

recovery

from

the

correct

2.

with

indica-

the

the correct

Z

the

Cylinder

Figure

22

t

from

12. Recovery

IBM

3340/44 Reference Manual

bytes and the high-order

bits 3 through

Action Table

of sense

7

of

(2

byte

4)

head byte are

6.

obtained from the

user. The

low-order

head

byte is obtained

3340/3344

Recovery

Action

Table

(continued)

Action

9A

10

11

If this is

Use

operation.

a

address

defective

defective

of

track, perform Action

Seek

File Mask

Set
Set Sector

ID

Search

Equal

(same as original)

(argument

(record

TIC* -8

Restart CCW 1

TIC

If the modifier seek argument is not within

Note:

(channel

seek argument before issuing

address

Use

a.

of alternate track in Seek command in the

Seek

File Mask

Set

Sector

Set

Equal

ID

Search

TIC*

-8

Restart CCW 1

(inhibit seeks)

(argument

(record

TIC

Increment

a.

Continue the

b.

the cylinder address

operation

Seek

Set File
Set

Mask (same as

Sector

Read Home Address

TIC

Note: If

seek

Increment

a.

Construct

b.

Complete

c.

following

argument

modified

the

before

the cylinder address

Restart CCW 1

interrupted

the

command chain.

Seek

File Mask

Set

Sector

Set

TIC*

Restart

ID Equal

-8

CCW 1

Search

TIC

Note: If the

argument before

seek

modified seek

track plus 1 in

0)

1)

status

the seek. If that

0)

1)

(channel status word)

of the user's seek

executing

by

(argument

(argument

(skip

(channel

seek

issuing

from

original)

0)

On)

bit

status

argument

the seek.

of the user's

Seek command and use the following CCW

a

word)

the

following

step a)

word

not

is

If

operation and continue

(argument from step a)

(same as

(argument

(record

(channel status

issuing

original)

0)

1)

word)

argument

the seek. If that

not

is

Explanation

9A.

the

impossible,

is

argument

command chain:

-

8)

within the

impossible, then IOS

that is

seek argument

the user's chain

the user's extent,

within

impossible,

is

extent,

user's

then

following CCW chain.

by

user's extent, then

then

must

IOS

one. Reset the head address.

must perform Action 2.

one. Reset the head address.

by

(if appropriate) by executing

then

then IOS must perform

chain

to

IOS must

supply the correct

perform Action

IOS must supply the

must supply the correct

IOS

Action

resume

2.

correct

the

2.

Figure

Recovery Action Tabic

12.

of

(3

4)

Error Recovery

Procedures 23

3340/3344

Recovery

Action Table

(continued)

Action

12

12A

13

Determine

a.

b. Continue

Seek

Set File

Set

Sector

Read Home

TIC

Note: If

argument

This is

a multitrack

Continue

Seek

File

Set

Set

Sector

Read Home

TIC

Note:

If the

seek

argument

Increment

Construct

Complete the

following

Seek

Set File
Set

Sector

Search ID
Search ID

TIC*

-8

Restart

CCW

TIC

Note:

If

seek

argument

if

the

interrupted

the

operation

Mask

Address

the seek

before

issuing

the

operation

Mask

Address

modified

before

the

user's seek

Restart

interrupted

command

Mask

Equal

Equal

1

the modified

before

by executing

(same

(same

(argument

(skip bit

(channel

argument

the seek. If

operation.

by

(argument

(same

(argument

(skip bit

(channel

seek

issuing

argument

CCW

1.

operation

chain:

(argument

(same

(argument

(record
(record

(channel

seek

issuing

command is

as original)t

as original)

0)

on)

status word)

is

not

within the

Increment

executing

from

as original)

0)

on)

status

argument

the seek.

by one.

and

from

as original)

0)

1)

0)

status

word)

argument

the

seek.

Seek.

a

the following

user's

that

is

impossible,

the user's

the

following

step

a)

word-8)

is not

within

If

that is

continue

step

a)

is not

within

If

that

is impossible,

Explanation

If

yes,

go to step b.

command

extent,

then

seek

argument

command

the

user's extent,

impossible,

the user's

the

user's

chain:

then

IOS

IOS

must

chain:

then

IOS must

chain (if

extent,

then

IOS must

If

no,

must

supply

perform

by one.

then

IOS must

perform

appropriate)

then

IOS must

perform

perform

the correct seek

Action

supply

Action

by

supply

Action

Action

2.

the correct

2.

executing

the

2.

12A.

the

correct

Message

Figure

12. Recovery

24 IBM

Message

Message

a.

b.

c. Module

d. Channel

e.

Status and sense

Cylinder bytes and

f

from

3340/44 Reference

Error

bits

(should

1

Code.

type

(read,

designation,

designation.

through

3

Action

Table

be printed

write,

bytes

the high-order

on all

or control).

cylinder

sent to CPU.

7 of sense

(4 of

4)

Manual

number,

head

byte 6.

permanent

and

byte are

errors).

head number

obtained

(that is, device

from the

user.

address

and

The low-order

seek address).

head

byte

is

obtained

CHANNEL

COMMANDS

command

The

3340/3344

SENSE

• Sense

• Read

• Test

• Read

COMMANDS

I/O

and

I/O

Diagnostic

CONTROL

• No

• Seek

• Seek

• Seek

•

• Restore

Operation

Cylinder

Head

Recalibrate

• Set

• Space

•

• Diagnostic

•

File

Sector

Set

Diagnostic

Device

•

• Device

more

For

ISC

the

to

Count

commands

following

used

set

follows:

as

is

Buffered

Reset

Status

COMMANDS

(executed

Mask

Load

Write

Release

Reserve

detailed

and

is

pages.

information

3830-2

briefly

summarized

perform

to

Log

no-operation)

a

as

reference

operations

the

on

manuals.

in the

with

commands

Each

on the

charts

the

refer

the

of

READ

•

•

•

•

• Read

• Read

• Read

• Read

•

WRITE

• Write

• Write Key

•

• Write

• Write

• Write

• Erase

COMMANDS

Data

Read

Read Key

Count,

Read

Multiple

Read

Home

Count

Initial

Sector

Record

Read

COMMANDS

Data

Count, Key,

Write

Home

Record Zero

Special

SEARCH

• Search ID

• Search Key

Search

•

• Search

Search Key

•

Search

•

• Search

Data

and

Key, and

Count,

Address

Program

Zero

and

Load

Data

and

Address

Count,

Key,

COMMANDS

Equal

Equal

Address

Home

High

ID

High

Equal or

ID

Key

Equal

High

or

High

Data

Key, and

Data

and Data

Equal

Data

Channel

Commands

25

SENSE

COMMANDS

Command

Test

I/O

(See Note

Sense I/O

(See Note

Diagnostic

Sense

(See Note

Read

Buffered

(See Note

1

2)

3)

and Reset

Log

4)

Note 1: Test

a system command

Command

the

by

Note 2: Sense

Code

Single

Track

00

04

44

A4

I/O is not

programmer.

data is reset after

code

a

3340/3344

(0000

Multi-

track

similar

0000) is

transfer.

Determines

-

Generated

information

-

Determines

caused the

Determines

-

diagnostic

transfers a

unit

to the system (after

Supplies usage or error

-

drive.

command, but

to

Start

I/O.

not

written

Function

the status

automatically

is required.

the type of

last unit check.

the

test (part of

diagnostic

rather

of a device on

of

type

test from the storage

the

by

channel

error

or unusual

error(s) found

a

Diagnostic

a

Diagnostic

statistics on the

Write command)

Note3: If

Note

4: Data is

a channel.

when status

condition that

on running

Load command).

addressed

the command

Diagnostic

16 bytes of

message

a

control

Write or

data

area are

reset after

Data

Across

One

24 bytes of

information.

16

or

message or

512

diagnostic

24

and overrun

information.

is

no

t preceded by

Load command,

from

the error code

transferred.

transfer.

Transferred

Channel

status

byte.

sense

of error code

bytes

of

bytes

test data.

bytesofusage

error

a

IBM

26

3340/44 Reference

Manual

Cow

wn

md

Code

Function

CONTROL

COMMANDS

Transferred

Data

Channel

Across

Operation

No

Seek

Cylinder

Seek

Count

Space

Recalibrate

Restore

Seek Head

File Mask

Set

Set Sector

03

07

OB

OF

13

17

23

IB

IF

action.

No

initial

Selects drive.

1.

Moves the

2.

Selects

3.

When chained

command,

area (including

with Channel End and

area.

When

over

Operation ends in

Channel

Moves the

action. Zero

No

Channel

Selects the head

Sets

diagnostic

Used

the need for

storage

the head.

Note:

this command

final status. No

destroyed.

is

Channel End

status.

access to the cylinder

the head

from

this command

RO), spaces

chained. Space Count

not

gap

, Home

1

End

access

address, gap

the

and Device

to

initial status is followed by

End and Device

specified by

file mask to

indicate

commands.

disconnected

on

the channel to

control while

If the RPS

feature is not

returns Channel End

operation is

All 3344 units have RPS.

and Device End are

specified by

specified by the seek address.

Read, Search, Write

a

locates the start of the

over the count area, and ends

Device End

following the RO count with

gap

End.

cylinder

End.

permitted Write, Seek, and

in the

searches for index,

and spaces

2,

and select head

the seek

command chaining

maintain

waiting for the selected

installed on

and

performed

presented during

or Space Count

before

gap

over RO count.

0.

final status

address.

channels

connection with the

record

the addressed

Device End together in

and

track

the

seek

next count

the Key

clocks

of

eliminate

to

reach

to

orientation

address.

3340,

None

Seek address

(six bytes)

Three bytes used as Key

Length (one byte) and

Length (two

Data

for the

next command.

bytes)

None

Six address bytes.

the five low-order bits

sixth byte are

of the

used for the seek

address.

One byte

data.

One byte

angular

of file mask

specifies

track position

(0-63)

Only

Control

Commands

27

Control

Commands

(Continued)

Command

Diagnostic

Diagnostic

Device Release

Device

Load 53

Write

Reserve

Code

73

94

B4

Transfers

storage

Transfers

control and

is stored in the

Diagnostic

main

Terminates

available

or string

Reserves the

is made.

switch

the specified

the

to

an inline test from

Sense command

storage; requires

the reservation of

for two channel

switch feature machines.

Only available

additional,

Function

512-byte block

control storage buffer.

the main

executes the

storage

addressed device for

test. A 1 6-byte

control buffer

transfers

a special file

the

switch, two

for two channel

or

string switch feature

from the

storage

area. A

the error

read-only

to storage

error code

subsequent

code message

mask.

addressed device.

channel

exclusive

switch

use

switch,

when selection

two

machines.

message

Only

additional,

channel

to

Data Transferred

Across

Channel

One

information

one sector

A maximum

bytes.

Twenty-four

bytes.

Twenty-four

bytes.

byte

of

control

addresses

on the

of

sense

sense

23FD.

512

28 IBM

3340/44

Reference Manual

READ

COMMANDS

Command

Initial

Read

Program Load

Note

(See

Read Data

Read Key

and

(See

Read

Read Record

Zero

(See Note

1

Data

Note 2)

Count 12

(RO)

3)

Code

Single

Track

02

06 86

0E 8E

16

Multi-

track

-

92

96

Function

Recalibrates to

and reads

point,

storage.

Transfers data area of a record

storage.

Transfers key

main storage.

to

Transfers

main

to

Transfers

cylinder and head 0,

R1

data

and

data

area

count

next

storage.

(count, key, and data)

RO

from the

areas of

(8

main storage.

from

a

bytes)

drive to

drive

record

from

from

searches

main

main

to

from drive

the

the

for index

drive

drive

to

Read

Data

First

after RO.

First data area after

address marker or

the data area of the

record

chained from

count or key

of the same

First key and data

area

area

data

that

was

the

area

record.

after address

marker or the key

and data

area that

was command

chained

from the

count area of the

record.

same

Next record count

or first count

area

area after

RO.

Record 0.

0,

the

Data

cannot be

in the same

command is

command.

Note

Note

1:

Read /PL command

A

Set File

a

2: If

the KL

the same

as a

Mask command

equals

Read

preceded by

chain.

executed

Note

3:

chained from a

When

command,

immediately and

point

index

the Read RO

does not initiate a

Search HA or

command

Read Commands 29

Read

HA

is executed

for

search

Read Commands (Continued)

Command

Single

Track

Read Home

1A

Address

Read Count,

1E 9E

Key, and Data

Read Sector

Note

(See

4)

22

Code

Multi-

track

9A

Transfers

Transfers count,

drive to main

Provides one

which is used by

When not chained

-

CCW, the

required

When

of the

five bytes

storage.

byte of

byte

to access the

chained,

record

used in the

Function

(FCCHH)

key, and

angular

a subsequent

from

transferred

last record

the byte transferred

to

data areas

position information

Set

Read,

a

Write,

is the angular position

previous CCW.

channel.

of

record from

a

Sector command.

or

Search

processed

is the

on the drive.

angular position

Byte

Byte

Byte 2

Byte 3
Byte 4

Next

record

Data Read

=

Flag

=

1

Cylinder

address

=

Cylinder

address

=

=

Head

address

record

or first

after RO.

Read Multiple

Count, Key,

Data

(See

Note

Note 4:

Note 5:

and

5)

Causes loss of

Command Retry

so certain

(The

is supported

con

types of errors cannot

Read

Multiple Count, Key,

on

figura

lions.

5E

orientation.

works only

3830-2,

Transfers

In

-

Count, Key,

bytes is

longest

incorrect

on single records,

be

and

FA, and

1

ISC with

remaining

use, this

command

and

unknown,

track

length.

length

retried.

Data command

3340/3344

records

is the

Data

commands.

CCW

count

Use

indication.

on

same

the

track

a

as a series of

Since the

should be

SILI

bit to

to the channel.

Read,

number

larger

than

suppress

of

the

Starts

at count

field

of next

record (except

RO)

—

30 IBM

3340/44

Reference Manual

WRITE

COMMANDS

Command

Special

Write

Count,

Data

Write

Write Record Zero

(R0)

Key, and

(See

Data

Note

(See

Key

Write

(See

Data

Erase

(See Note

Note

(See

Note 1)

2)

and

Note

4)

5)

3)

Single

Track

01

05

0D

11

15

Code

Multi-

track

Same as

1 is

record overflow

Changes

Changes

Operates

command

written

Writes

Write Count,

written in bit

the data

the key

exactly

except

the

on

count, key,

Function

Key, and Data

the flag byte to indicate a

4 of

segment.

record.

of

area

a

and data areas of

Count, Key,

Write

like a

data

from

areas

that data

track.

and

command except

a record.

and Data

channel is not

the

R0.

of

Written

Data

Write

as

Same

a

and Data.

Key,

from

Data

the number of

Writes

specified by

bytes

bytes

DLDL

area

count

record.

Data from

the

Writes

specified by

bytes

and DLDL

KL

count area of

the

record.

same

Bytes of 0s to

track.

byte

Flag

CCHHRKLDLDLfrom

and data

Key

system.

written

system

count area.

Count,

the system.

the

of the

of the same

system.

the

number of

the

bytes

the

end of

from HA

in

from

of

area.

Note 1:

Note

Note

Same

for last

2: If

Must

Equal

If file mask is

3:

Must

Equal

the same as Write Data.

Write

as

segment of

file mask is

chained from a

be

Search Key

or

chained from a

be

command.

Count,

violated,

violated,

Key,

an overflow

set Command

successful Search ID

Equal

set Command

successful

-

If

KL

0,

and Data. Not

record.

Reject.

command.

Reject

Search ID

operation is

used

Note

Note

4:

5:

The

byte,

Same as

skips writing

CU

ECC.

or

Write Count,

must be chained

successful Search HA

an address

Key, and Data except it

marker,

from a Write HA

command.

Equal

Write

sync

or a

Commands

31

Write

Commands

Command

Write Home

Address (HA)

(See Note

Write

Key and

(See

Note

6: Must

Count,

Data

Note

the

CCW

bit (flag

If

not

bit

must be

(Continued)

6)

7)

be

chained from

count

byte,

chained

on.

Single

Track

19

ID

area of

bit

6)

from

Code

a

four

is off.

a

satisfied

Multi-

track

satisfied

or

Writes the

on the

Writes one

and track.

Search

more) if

Search HA,

defective

7-byte (SDFCCHH)

selected drive

complete

HA

(with

defective

Function

and

record

track.

Note

home

on the

7:

address

selected drive

If file

mask

Must

be

chained

Key,

and

Equal;

or

last

Count,

write

Os to

area

is violated,

Data;

Search

Key,

index.

from

Erase;

Key

and

The

set

Write

a

successful

Equal

Data

command

Data

Written

7-byte

home

address

transferred

system.

Count, key,

areas of

the

areas

system. The

flag byte,

data

control.

next

track.

comes

come from

Command

RO; Write

Search

command.

(SDFCCHH)

area

from

the

and

data

record on

Data for the

from

the

count

ECC,

and

storage

Reject.

Count,

ID

After

on

a track,

area

gap

IBM

32

3340/44 Reference

Manual

SEARCH

COMMANDS

Command

Search Key

Note

(See

Search I D

Home

Search

Address

Search

(See

Search ID

(See

Search

Equal

(See Note

Search

or

(See

Equal

Key

Note

Note

Key

or High

ID

High

Note

Equal

1)

Equal

High

2)

High

3)

4)

Equal

5)

Single

Track

29

31

39

49

51

69

71

Code

Multi-

track

A9

B1

B9

C9

D1

E9

F1

Function

system.

system.

the

key area

count area

home address

key area

count area

a

Locates a

the

Locates a

by

Locates a

selected by

Locates a

the system.

Locates

by the system.

system.

system.

the

key

count

Locates a

the

Locates a

by

selected by

selected

system.

the

selected by

selected

area selected by

selected

area

area

Data

The key

drive

system.

Five bytes

area from the

with CCHHR

Four

area

with

The

drive and

system.

Five

area

with

The key

drive and

the system.

Five bytes

area from

with

area

track

and

bytes

from the

CCHH

key area

track

bytes

the selected

from

CCHHR from

area

track

the selected

CCHHR

Compared

the

from

bytes

with data

(CCHHR)

selected

from

(CCHH) of

selected

from the

bytes

with data

(CCHHR)

bytes

with the key area from

(CCHHR)

from the

from

of the

drive

the system.

home address

drive and track

system.

from the selected

from the

of the next

drive and

system.

the

from the

of the next count

drive and

system.

selected

the

next count

and track

count

track

selected

track

the key

Note

Note

area

key

The

1:

record

next

Count

Read

a

chained

searched is in the

Same as

2:

is

higher

from a

Search

located

than

compared

(excluding

or

Count

Key

in any

key

the

is

RO),

ID

Search

operation,

same record.

Equal

key area

area from

command.

except

on

unless

the

the

area

chained

key area

the

the key

track

system.

of the

If

area

that

from

is

3: Locates any ID

Note

wan

4: Same as

Note

located

from

5: Locates

Note

higher than

the ID

Search

is

the

the ID

from

the system.

from

Key Equal

equal to or

system.

from

ID from the

the

the track

except

higher

the track

higher

is

that

the key

the key

than

that is

system.

Search Commands

area

area

equal to

or

33

SENSE DATA

The status

in the

different formats, 0-6.

describe

three formats,

storage

3340/3344 are

the

ISC and

2, 3,

Some

attachment

should

a complete

ing manuals

115,

• IBM

Characteristics,

IBM

•

Characteristics,

IBM

•

Characteristics,

and condition

sense bytes.

the disk

control.

3830-2

and

a detailed

sense byte

methods.

also

order

set of sense

are

and

125,

System/

System/

System/370

There

storage

and

0, 2,

Only the formats

explained

reference

description

formats may

companion

recommended

135 users:

370 Model

Order No.

370 Model

Order

Order

of the

are 24

Four formats,

condition.

3 are

associated with the

in

this publication.

manuals for

of Unit

vary for

Therefore,

manuals

byte

information.

for

115

GA33-1510.

125

No.

GA33-1

Model

135

No.

GA33-3005.

3340/3344 is

bytes

and seven

1, 4,

The remaining

dealing with

formats

Status.

the different

the

3340/3344

in order to

The follow-

System/370

Functional

Functional

506.

Functional

reported

and

5,

the

Refer

Models

6

0,

user

have

to

Sense

In all

the

high-level

tion.

Sense

remaining

'•

Byteyiev

S •

7

Byte

Summary

formats,

information

byte

bytes,

0-3

Bits

4-7

Bits

4 5

1

1 1

the first

eight

concerning

7 identifies

8 through

=

The

1 2

1

1

1 1

=

Define

24,

format

a message.

6 7 Message

1

1

11

bytes,

0-7, give

status

the

format

are

arrayed:

array

of bytes

3 Format

1

1

4

1

5

6

1

F

and condi-

in which

8-24

the

Each

of

possible

following

the formats

messages) is

pages.

,

4, 5,

and

1

summarized

6 (including

in the

charts

the

on

the

34 IBM

3340/44 Reference

Manual

SENSE

BYTES

0-7

SUMMARY

Byte

6

BitO

Command

Reject

•Permanent

Error

Feature

RPS

Present

128

HIGH-ORDER

Intervention

Required

Track

Invalid

Format

Correctable

RESTART

PHYSICAL

B I

64

LOGICAL

512

FORMAT

J.

Channel Bus

Out Parity

I

End

Cylinder

I

Not

l

COMMAND

|

DRIVE

|

CYLINDER

0-3

(bits

I

Equipment

Check

I I

of

Used

Not Used

I

Environmental Compatibility

Data

I

(Provided

only

I

IDENTIFICATION

C I

LOW-ORDER

32

|

ADDRESS

256

|

hex)

Present

when byte

D

16

-L

No

Found

I

Mode

I

I

LOGICAL

AND

LogTrk8

Data

Check

Record

1 bit

7.

CYLINDER

8

Overrun

File

Protected

1

Operation

I

_|_

Log

|

MESSAGE

—

Incomplete, is

ADDRESS

4

LOGICAL

Trk 4

-L

I

Data

I

J_

|

CODE

6

Condi-

Track

tion Check

Write

Inhibited

Storage

Note

See

active)

TRACK

Trk 2

Log

4-7

(bits

Type

hex)

Seek

Check

I

Operation

Incomplete

LogTrkl

|

^OR

Set by Error

o

I

I

1 1

Seek

If

**

Current

(address)

remains

in Bytes

|

2

Procedures

3

|

Recovery

1

»*CURRENTSEEK

ADDRESS

i l

**CURRENTSEEK

ADDRESS

1 1 1 1 1

active

Check

address

seek

to

issued

same

the

and 6.

5

4

|

|

i 1 1

(byte bit

is the

device.

the

above.

as

516

7)

argument

last

Byte

Always

I

format

present

Storage

Data

Note:

7

5

3348-35Mb

Module

Data

Type

6

7

1

3348-70Mb

Module

Data

or 3344

1

3348-70F Mb

Module

Data

or3344-B2F

1

1

Sense

Data 35

FORMATS

and 5 MESSAGE

1, 4,

SUMMARY

MESSAGES,

Transmit

Head

Difference

(3344)

status

selection

6

address error

Transmit

error

Transmit

difference

8

error

Drive

as

9

during

Seek verification

check

address

Seek

B

Sector

Format

No

Message

Transmit target

error

Microprogram

detected error

(See

byte

18)

Fixed

error or

Transmit

High

Sync

Out

timing

error

Unexpected

Transmit

expected

drive

at initial

cylinder

head

status

not

Read IPL

on

physical

Incomplete

or

Non

-compare

determined

1

Error

by format

Format

area

HA

check

data

Count area

data check

Key

area

data

check

Data

area

uncorrectable

data

check

HA area

no sync byte

found

Count

no

found

Key area

no

found

Data

no

found

Not

(3344 only)

AM Detection

failure on retry

Not

Not

—

area

sync

byte

—

sync

byte

—

area

sync byte

Used

Used

Used

—

and message

4

code

Format

Used

Not

Not

Used

Not

Used

Data

area

correctable

data

check

Not

Used

Not

Used

Not

Used

Not Used

Not

Used

Not

Used

Not Used

Not Used

(byte

5

7)

No Interrupt

from drive

Defect

skipping

re-orientation

check

DM

Incompatibility/

Invalid

DM

on

3344)

size

(not

Not Used

Format

IBM

36

3340/44 Reference

Manual

Not

Used

Not

Used

1

Not

Used

Not

Used

1

Format

4

Not Used

Not

Used

Not

Used

Not

Used

Format

5

3340

SENSE

BYTE

FORMAT

SUMMARY

1

Byte

8

Drive

Status

9

Checks,

Status

10

DMSeq

Control

1

1 Load Sw

Status

12

R/W

Safety

13

14

15

Bit

Controller

Check

Module

Data

Loaded

Lchd

Sw

Module

Data

Size

Check

Drive

Start

Switch

Multiple

Head

Switch

(If

Sel

(For

Message

1

Drive

Interface

Check

Sector

Compare

Check

Module

Data

4

Latch

Module

Data

Present

Switch

Capable/

Enable

Check

CONTROL

Message

Code

2,

CONTROL

(Valid

CONTROL

(Valid only

Drive

Check

Motor-at-

Speed

Latched

Module

Data

Latch 2

Cover

Locked

Switch

Write

Overrun

INTERFACE

C)

Code

Microprogram

see

4-

INTERFACE

I

for

only

-I-

INTERFACE TAG BUS (At time

ii i

for

Read/Write

Check

Air/Belt

Switch

Latch

Module

Data

Latch 1

Module

Data

Unloaded

Switch

Index

Check

BUS OUT

I

Messages, Bjt 18.

BUS

I

Message Codes 1,

Message

Codes

IN (At time

1, 3,

On

Line

Write

Enabled

Check

Latch

Data

Loaded

Switch

Read/Write

Interlock

Check

EXPECTED

or

I

I

3, 5, 6,

5, 6,

Module

Valid

error

7,

8,

error

and

7, 8,

Data

Module

Attention

Data

Size 4

Fixed

Data

Sequence

Check

Air/Belt

Switch

Control

Check

DRIVE

I

for

1,

detected)

was

I

and

was

i

9).

Module

Head

Data

Size

-70 Mb

Module

Ltchd

STATUS/DATA

5,

I

6, 7,

3,

9).

detected

Busy

Module

2

Bias

Disable

Switch

Carriage

Home

Transition

Check

and

9)

8.

7

Seek

Complete/'

Search

Sector

Module

Data

Sizel

-35 Mb

Odd

Track

Motor-at-

Speed

Switch

Write

Current

Check

OR

1

OR

2

Access

1 6

Status

^

1

Controller

Checks

Micro

g

1

Detected

Errors

19

Status

20

Interface

Checks

21

22

23

Access

Out

Time

Check

PLO

Check

Read/

Set

On

Write

See

1

Cntrl I 'face

Tag Bus

Check

Parity

Overshoot

Check

PLO

No

Input

Check

I'face

Cntrl

Out

Bus

Check

Parity

Servo

Off-track

Check

SERDES

Check

Drive

Selection

Check

FAULT

FAULT

Track

Crossingi

Gap

Counter

Check

Check

Cntrl

Bus

Parity

CODE

Device

In

Bus

Parity

SYMPTOM

SYMPTOM CODE

Servo

Latch

Write

Data

Check

I'faee

In

Check

Linear

Mode

Latch

Ivlonitor

Check

Coded

Lo

Error

Initialize

Write

Failure

Error

(bits

Gain

Condition

4-7

hex)

Device

Bus

Parity

Control

Latch

ECC

Check

Out

Check

Wait

Latch

ECC

Zeros

Detected

Fixed

Head

Feature

Device

Tag

Parity

Check

OR

4

OR

3

Sense Data

37

1

If

Busy

If

Set R/W is

Bit 5
Bit

Bit 7

is

on

(Byte

active

=

I Write

6=

Index

=

Active Track

8,

Sense

Mark

bit

(Byte

6).

19, bit

Search

Sector is

0),

in

progress.

2 If Seek

PREVIOUS

3

If

Seek Check

4

Microprogram

1

Check is

SEEK

128

High

is

128

High

Error

Not Used.

No

Tag Valid on R/W

(Byte

on

bit

7),

bytes

0,

IT

ADDRESS (drive location

64

Logical

512

on (Byte

PRESENT

64

Logical

512

Messages

Cylinder

| 256

bit

0,

T

|

Cylinder

256 |

I

(Sense Byte

Op.

32

Address

7),

SEEK

32

Address

bytes 20

13

and 14

Is

and

1

ADDRESS

16

I

18,

are

W

before present seek;

16

bits

21 are:

4-7

1

Low

hex)

8

9

8

Logical

8

Head switch

Busy

15

bytes

1

Cylinder

Logical

missing

and

5

6

Logical

Track

Address

4

Track

timer expired

after

seek

Low

1

Address

start

Logical

Address

2

check.

issued.

is

17

Cylinder

No

2

3

4

5

6

7

Normal

on R/W

No

response from controller on Control Op.

Time-out waiting for index or Active

ECC

Multiple

Preselection

or Check

Op or on ECC

Hardware Check.

or no controller selected.

Check.

End

Op.

track.

Incorrect

A

Not used.

B

Not

C

D

E

F

used.

Not

used.

Not used.

Attention Check.

drive

selected.

38 IBM

3340/44

Reference

Manual

3344

SENSE

BYTE FORMAT 1

SUMMARY

Byte

8

9

10

11

12

13

14

15

Drive

Status

Checks,

Status

Sequence

Control

LoadSw

Status

R/w

Safety

Bit

Controller

Check

Drive

Start

Latch

Multiple

Sel

Head

Check

Message

(If

Device

Interface

Check

Sector

Compare

Check

Spindle

Sequence

Latch 4

Guard

Band

Pattern

Capable/

Enable

Check

CONTROL

Message

(For

Code 2,

1

Code C)

see

CONTROL

(Valid only for

-I

CONTROL

(Valid only for

Drive

Check

Motor-at-

Read/Write

Check

Speed

Latched

Spindle

Sequence

2

Latch

Target

Velocity

Write

Overrun

INTERFACE

Microprogram

INTERFACE BUS

I

I

-4-

i I

Message

L

INTERFACE

i

i

Message

Air/Belt

Switch

Latched

Spindle

Sequence

1

Latch

Track

Crossing

Index

Check

BUS OUT or

Messages, Bit

IN (At

Codes

1. 3,

TAG BUS (At

Codes

1, 3, 5,

On

Line

Write

Enable

Timer

Check

Delta

Check

EXPECTED

|

18. Valid

-4-

time error

5, 6, 7, 8,

time error

6, 7,

Ltch

IW

8,

Spindle

Attention

Fixed

Installed

Sequence

Check

Air/Belt

Switch

DRIVE

I

for

-4-

detected)

was

I

and

was

and

9)

Head

Ltchd

Control

Check

STATUS/DATA

5, 6, 7,

1,3,

9)

detected)

Busy

Always

On

Transition

Check

[

and

8,

9)

Seek

Complete/

Search

Sector

Always

On

Odd

Physical

Track

Motor-at-

Speed

Switch

Write

Current

Check

OR

1

OR

2

16

Access

Status

17

Controller

Checks

Micro

18

Detected

Errors

19

Status

20

Interface

Checks

21

22

23

Access

Out

Time

Check

PLO

Check

Read/

Set

on

Write

byte

(see

Cntrl I 'face

Bus

Tag

Check

Parity

Overshoot

Check

No

1)

Cntrl I

Bus Out

Parity

PLO

Input

'face

Check

Servo

Off-track

Check

SERDES

Check

Drive

Selection

Check

FAULT

FAULT

Rezero

Mode

Latch

Gap

Counter

Check

Device

In

Bus

Check

Parity

SYMPTOM

SYMPTOM

Servo

Latch

Write

Data

Check

Head

Short

Check

Cntrl

Bus

Parity

CODE

CODE

I'face

In

,

Check

Linear

Mode

Latch

Monitor

Check

Coded

(bits

Initialize

Write

Failure

Control

Latch

ECC

Check

Error Condition

4-

hex)

7

Device

Out

Bus

Check

Parity

Wait

Latch

ECC

Zeros

Detected

Fixed

Head

Feature

Device

Tag

Parity Check

OR

4

OR

3

Sense

Data 39

If

1

If Set

2 If

PREVIOUS

Busy is

R/W

5

Bit

6=

Bit

7

Bit

Seek

128

on (Byte

is active (Byte

=

Write Sense

I

Index

=

Active Track

Check is

8,

Mark

on

bit

(Byte

Search Sector is in progress.

6),

bit

19,

0),

bit

0,

7),

72 [3 14 IT

SEEK ADDRESS (drive location

64

32 16

bytes

13 and 14

are:

before present seek; bytes 5

8

and

6

6

Low

Logical

17

Cyl

inder

1

3

Seek

Jf

4

Microprogram

1

2

3

High

|

Check

is on

128

High

I

Error

Not Used.

No

Tag Valid on R/W

No

Normal or Check

on R/W

No

Op or on ECC

response from

Logical

512

(Byte

PRESENT

64

Logical

512

Messages

controller on

Cylinder

|

bit

0,

i

Cylinder

256

|

(Sense Byte

Op.

End

Op.

Address

256

bytes 20 and 21 are

7),

SEEK

1

ADDRESS

32

Address

18,

Control

Op.

16

bits

4-7

r

Low

8

9

A

B

Logical

hex)

Head

Busy

Incorrect

Not used.

Logical

Cylinder Address

Logical

switch timer expired check.

missing

drive

Track

4

Track

4 I

after seek

selected.

Address

2

I

Address

2

start is issued.

40

Time-out waiting for index or

4

ECC

5

6

7

IBM

Hardware

Multiple

Preselection

3340/44

Check.

or no controller selected.

Check.

Reference Manual

Active

track.

C

D

E

F

Not

used.

Not

used.

Drive

at invalid

Attention

address.

Check.

SENSE

BYTE

FORMAT

SUMMARY

4

BitO

I I

Byte

*8

CYLINDER

I I |

*9 CYLINDER

|

*10

*T1

*12

13

HEAD

|

HEAD

I

RECORD

|

SECTOR

|

14

l_

1

ADDRESS

ADDRESS

ADDRESS

ADDRESS

NUMBER

NUMBER

2 3

|

I

L

|

| |

| |

i I

I I

I I

|

I

4 5 6 7

I

I

I

I

I

I I I I

I I

I I .... J

I I I

I I I

I I J

I I J.

I I

I

15

16

17

18

19

20

21

22

23

Count

Identification

I

_1

I

I

|

I I

FAULT

|

FAULT

|

I

|

|

|

|

SYMPTOM

I I

SYMPTOM

I

CODE

CODE

I I I I I

I I I I I

I

I I I I I

|

I I I I I

I

I I I I

I

I I II

I I I !...._

I I I

.-

Sense

Data

41

SENSE BYTE

FORMAT

5

SUMMARY

Byte

*8

*9

•10

•11

*12

13

14

15

B't0

I

1

CYLINDER

1

CYLINDER

•

HEAD

ADDRESS

1

HEAD

ADDRESS

1

RECORD

1

NUMBER

SECTOR NUMBER

1

>

RESTART

1

DISPLACEMENT

|

2

3

|

4

!

ADDRESS

1

i

I 1 1 |

ADDRESS

1 1 1 1

1 1 1 1

1 1 1 1

II

1 1 1

1 1

1 1 1

1

1 1

5

|

i 1

1 |

I | ,

1 1 |

I 1

l

II

6

|

1 1

7

!

16

17

IS

19

20

21

RESTART

RESTART

1 1 1

ERROR

1

ERROR

1 1

DISPLACEMENT

DISPLACEMENT

ERROR PATTERN

1

ERROR

1

PATTERN

22 ERROR PATTERN

1

23

1 1 1 I I 1 1

*

Count

Identification

DISPLACEMENT

1 1

I

DISPLACEMENT

1 1 1 |

1 1 1 1

1 1

1 1 1 1

1 1 1 1

1 1 1

1

1

1 1 1

1 1

1 1

I |

|

1 1

1

IBM

42

3340/44

Reference

Manual

SENSE

BYTE

BitO

FORMAT 6

SUMMARY

Byte

8

9

10

11

12

13

14

15

16

NUMBER

I

NUMBER

J

NUMBER OF

J

NUMBER OF

J

J-

NUMBER OF

J

BYTES READ

OF

I

BYTES READ

OF

I

BYTES

I

BYTES

I

SEEK

I

OR

I

OR

I

READ OR

I

READ OR

I

I

COMMANDS

I L-

SEARCHED (Key

I

SEARCHED (Key

I

SEARCHED

SEARCHED

(Key

1

(Key

I

PROCESSED

Data Areas

and

and Data

Data Areas

and

and Data

Only)

1

Only)

Areas

1 L

Only)

1

Only)

Areas

I

17

'18

*19

*20

21

*22

•23

*

Bytes

Channel select

for byte*

18-23

20-23

Not

NUMBER OF

COMMAND

I

OVERRUNS

DATA

J

COMMAND

J_

OVERRUNS

DATA

J

device-dependent

COMMANDS

SEEK

I

I

OVERRUNS

I

I

OVERRUNS

'

I

information.

PROCESSED

I

CHANNEL

CHANNEL C

I

CHANNEL

CHANNEL C

CHANNEL B

CHANNEL D

CHANNEL

CHANNEL D

A if byte

if byte

byte 18

A if

if byte

I I

if

byte

byte 18 bit

B if

if

byte 18

byte 18

if

1

__l J

L_

I

I

1

18

18

18 bit

18 bit

is

bit

bit is

bit is

is 1

is

bit

bit is 1

is 1

is

_L

1

L

L

L

43

Data

Sense

OPERATING

3340

OPERATOR

INSTRUCTIONS

PANEL

3344

OPERATOR

PANEL

Ready

Lights

ready

Indicator

when the

for

Start/Stop

With

the

data

module is

track

When

unloads

cannot

the

Read

Lights

data

the

0,

1

The

2. The

3. The

the

unload

drive

Only

when

module

Read

provided

and

operation.

Switch

switch

or with

loaded

drive

power

data

module

cover

switch is

the cover

while

set to

is closed

Indicator

the write

is loaded.

Only

function

data

that:

set

the system

a

pending

module

Start, the

and

the heads

is

on.

is

in

place.

and

to

Stop, the

unlocks.

Attention.

function

Write

on

the

is properly

cover is

are

latched.

data

The

data

is

communicating

is inhibited

is inhibited

data

module.

1

inserted

locked,

moved

2

1

the

to

module

module

after

the

by enabling

and

with

START

STOP

It

Ready

The

on, the

is

Lamp

Ready

drive

on a track.

Start/Stop

The

drive

When

set

start

spinning,

When

set

engages,

in

the

stop

busy.

Attention

When

pressed,

Rezero

zero,

to

resets

the

controller.

operation.

lamp

speed

Switch

Start/Stop

to

Start,

and

to

Stop,

and

the

disks

position

Pushbutton

the

the

address

turns

on

is

up

switch

the

brake

tl

e heads

the heads

stop.

prevents

Attention

Rezero

registers,

R/W

READ

when

to

normal,

starts

is

released,

move

io

ract,

An

a stop

pushbutton

moves

the heads

and

the

drive

and

and

stops

to

cylinder 0.

the

electrical

if

the

starts

signals

power is

the

head

a

the

disks

brake

interlock

drive

a

to track

attention

drive.

is

Cover

Lights

Attention

By

a Rezero

44

Locked

when

the drive

Pushbutton

operating

1. Read/Write

2. DM

controller.

3. Drive is

(after

IBM

the

operation:

(data

placed

maintenance

3340/44

Indicator

cover

is locked.

attention

heads

module)

Reference Manual

pushbutton

are

Attention

online

completion).

moved

and

CE

to track

is

signaled

mode is

the

drive

0.

reset

begins

to the

R/W

or

When

in

can

be

done.

possible.

operation,

operation

Read

the

Read

If set

If

the

the

condition

is

completed.

Switch

position,

to

switch

R/W,

position

does

no

write

all

normal

is

changed

not change

or

erase

operations

until

operation

during

the

are

an

3340/3344

POWER

PANEL

Machines

Power

Operation of the

applied to

be

power

sequencing

tion.

Without String

On Switch

the

present. The

is

controls

Power

3340 or

switch is

during a

Switch

Q

On switch

3344 provided

allows ac power to

bypassed by the

system

Feature

subsystem

power-up opera-

Machines

r

Enable/Disable Switches

The

be used to

drives to

With String

Enable

I

Disable

Enable/Disable

a

Enable

'

I

Disable

dedicate the

interface.

single

switches

Switch

3340-A2

Feature

Power

(A or B

Interlocking is

On

interface) can

associated

and

provided.

Power

Operation

from the

During a

bypassed and

controls.

Note:

load or

Off Switch

of the

3340 or

system

not use

Do

unload

Power

3344 when

power-down

power is

Power

the data

Off switch removes

system power

operation, this switch is

removed by

On/Power

module.

the sequencing

Off

ac power

is up.

switches to

Operating

Instructions

45

DATA

MODULE LOADING

1

2. Open

3

4. Close the top

5. Place the Start/Stop

6. The

the Start/Stop

Place

the top cover.

With the data

the drive,

shroud recess

Cover Locked indicator

The

the start of the load sequence.

module doorway facing the rear of

lower the data module

until it is seated.

cover.

data module

20 seconds, the Ready

show the drive is ready.

Change Device

control.

End Interrupt to the

switch in the stop position.

into the drive

switch in the start position.

will light indicating

is automatically loaded. After

indicator will light

to

This also forces a Pack

storage

DATA MODULE UNLOADING

1

Place the Start/Stop switch in the stop position.

2. When the Cover Locked indicator turns

open the top cover.

3.

Lift the data module from the

h^^H

Read

Only

drive.

HI

i

'

START

STOP

'J'

1 1

off,

2

Note:

on:

a. Proper data module

b. The

c.

Fixed head

Correct data module loading depends

shroud

recess.

3340 top cover being

The 3348 Model 70F being used

drives
the

out

indicates ready, but the

to the system. Intervention

in

having the

fixed

Model 70F is loaded on a

the

the sense information.

head

fixed

drives can operate

module.

7. If the data

indicator does not

switch.

switch at Stop

does

assistance.

module fails to load,

light.

If nothing happens, place

and press Reset

not respond, call for

alignment in the drive

closed.

fully

only

on

head feature.

feature,

the Ready

drive is not online

If

drive with-

light

Required is set

with any data

the Ready

Press the

drive Reset

the Start/Stop

again. If the drive

customer engineer

Opening

Cover

46 IBM 3340/44

Reference

Manual

Load/Unload Data

Module

READ

The

data. On the

for

3340 units

the data module.

Enable

ONLY

Only

Read

this purpose,

Read Only

1.

With

press

B).

and

Turn inset

2.

data module may

The

3.

desired drive.

3344

the

the data

down the

FUNCTION

function

is

means

180°

protects previously

units a

located

protecting data is

for

Function

module

IBM

and

or R/W switch,

Read

on the

operator

removed from the

logo

snap

now be

inset of

into

the handle

place

loaded in

written

panel.

located

drive,

(C).

the

used

In

on

(A

Disable

1.

2.

Note:

Read

the

Read Only

With the data

return the

reverse

data module

The

desired drive.

Do not

Only

function

drive shroud recess.

Function

module removed from the drive,

IBM

180°

logo inset

(D).

original position

its

to

may now be loaded

attempt

to enable or disable the

while the data

into

the

module rests in

Read/Write

A

B Actuate

from

Read/Write

to

Read

Only

ReadOnly

C

D Actuate

from Read

Only to

Read/Write

Operating

Instructions 47

INDEX

AC on indicator

mechanism 2

Access

motion time 16

Address

cylinder 41

flag 10

41

head

home

present

previous

16

seek

Addressing, device 16

logical 6

multiple 16

physical 6

Areas

count 8

data 8

key 8

Attention

check 38,40

pushbutton 44

45

8,10

38, 40

38, 40

B

Bus out parity 20
Busy

37

Byte

detection code 1

10

flag

22

head

home address 10

skip displacement 10

Capacities

cylinder and track 12,14

data module

Cartridge (see data module)

Channel A 43

Channel C 43

Channel command word

Channel commands

listing

control

read

search

sense

write

summary

control

read

search 33

sense

write

Channel status word (CSW)

Characteristics 1

Checks, error 37,39

Command reject

Configurations

DDA 4

IFA(3135) 5

ISC or

25

25

25

25

29,30

26

31,32

3830-2

13,15

25

27, 28

20

5

6

(CCW) 1

1

maximum 5

Control

integrated storage

4

3340-A2 2

Control commands

listing

25

summary

Correctable

Count

area

27

errors

8

20

Cover locked 44

Cylinders

alternates

cylinder

6

boundary 20

number 10

D

area

Data
Data check 20

Data

Data module

data surface format 6

initialization 6

models 6

illustration 6

types 6

Data records

Data security

Data surface format 6

Data transfer rates 17

DC On indicator

DCB (detection

DDA (direct disk attachment) 4

Defect

Delay, rotational 17

Detection

Device release

Device reserve 28

Devices,

Diagnostic load

Diagnostic sense

Diagnostic

Direct

Direct

Disk storage

configuration 4

features

modules

Drive

selection 16

E

End of cylinder 20

Environmental

Equipment check 20

Erase

Error

condition table

correction function 18

recovery

Error

Error correction function 18

Error displacement

Error

8

length

10

illustration

8

7

and privacy 17

45

code bytes) 1

skipping 1

code bytes

28

control

storage

Access storage 1

disk

addressing

3

condition table

pattern 42

28

26

write 28

attachment (DDA)

3

1

data

action 18

(DCB)

3

present 20

20

20

42

1

4

48 IBM

3340/44

Reference Manual

symptom

Fault

Features,

fixed

head

remote

rotational

string

Feature,

File

File

Fixed

Flag

3344

string

protected

protection

head 3

byte

Formats

record

count

data area

key

track

Function,

Gap

10

Gl

10

G2

10

G3

11

G4

H

selection

Head

address 8

Home

I

(integrated

IFA

Index

even

odd

Indicator

cover

Power
Power On

read

ready 44

Initialization,

Input/output

Integrated

Integrated

Intervention

Invalid

(integrated

ISC

Key

area

channel

length

L

Length

data

key

Loading,

code

3340

3

switch

position

switch 3

switch 3

20

10

area 8

area 8

8

only 47

read

6

6

locked

Off 45

44

only

data

operations 16

file

storage

required

track

8

commands

(KL)

11

11

data

41

3

sensing 3

17

8

16

time

attachment)

file

44

45

module 6

attachment

control

20

20

stora^

11

control)

module

25

46

(IFA)

(ISC)

M

Macro-orders

Message

Module,

Multitrack

N

No

No

Number,

o

Operating

Operation

Operator

Overrun

summary

Data 1

operation

record found

cylinder

module

data

module

data

only

read

3340/3344

3340/3344

panel

attention

cover locked

only

read

indicator 44

ready

start/stop

command

data 43

Panel

3340/3344
3340/3344
3340/3344

Physical

Power

Power

Power

address

off

on

panel

Power

Power

enable/disable

power

power

Preventive

Programming

Read and

commands

Read

listing

summary

count

Read

count

Read

data

Read

home

Read

initial

Read

key

Read

multiple

Read

only

Read

description

3340
3344

disable

enable

2

36

operation

27

20

10

instructions

loading

unloading 46

function 47

operator

power

incomplete

pushbutton

44

indicator 44

switch

43

operator

power 45

string

switch

switch 45

On

Off

off

on

16

45

indicator

indicator 45

switches 45

switch

switch

maintenance

error 20

buffered

reset

25

29

29

data

key

29

address

program

data 29

count key

function

17

17

17

47

47

20

46

panel

panel

20

44

switch

45

45

30

30

load

44

44

45

log

45

1

data

44

45

26

29

30

Index 49

Read only
Read record

indicator

zero

(RO)

44

29

Read sector 30

Read/write

Ready

Recalibrate

rates 17

indicator 44

27

Record

data 8

equal-length

9

format 8

length 12

overflow 8

zero

Record number
Record overflow

Recovery action

Remote switch

Restart CCW1 18

Restart CCW 2 18

Restart

Restore

Rotational

10

42

8

table 21

attachment

displacement 42

27

delay

average 17

maximum 17

Rotational

R/W or Read

Search

listing 25

summary

Search home
Search ID equal 33

Search ID

Search ID high 33

Search key

Search key equal or high 33

Search key high

Sector number

Seek address
Seek check

Seek cylinder 27

Seek head

Seek verification

Sense
Sense commands

listing

summary 26

Sense

Sense

Servo system 2

Set file mask
Set sector

Skip displacement

Space count

Speed, access and

Start/stop

Storage control

IFA 4

ISC 4

3830-2

String

enable/disable

feature

Summary, format

3340 sense byte

3344 sense

Switches

enable/disable

position

switch 44

commands

33

address

equal or high

equal 33

33

42

16

20

27

byte summary

25

data 34

I/O 26

27

27

27

data transfer

switch 44

4

switch

3

byte 39

sensing

equal 33

33

17

34

10

switches 45

1

37

45

power off 45

power on 45

start/stop 44

System attachment

System/370,

System/370, direct

Test I/O 26

Timing

specifications

access

motion 16

head selection

rotational delay

models

1

3

access for 1

16

17

Track

capacity

capacity

defective 20

descriptor

format

Track

9

formula 9

record 8

description

illustration

descriptor record

8
10

(R0) 8

u

Unit check

Unloading,

Verification,

Voice-coil

16

data

seek 17

2

module

45

w

Write

commands

listing

count,

25

data 31

and data 31

special

3340-A2 1

3340-B1 1

3340-B2
3344-B2 1

3344-B2F 1

data module

key,

and data 32

address (HA) 32

20

zero

count, key and

storage

1

(R0)

31

45

1

6

6

data 31

summary 31

Write

Write
Write home
Write inhibit
Write key

Write record
Write

Numeric

3340/3344 disk

16

configuration 1

models

operator panel 44

power panel

3344 disk storage

3348

capacities

models 6

illustration

50

IBM

3340/44

Reference Manual

READER'S

COMMENT FORM

Reference Manual

3340/3344 Disk

IBM

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