Adaptec ACB-4525Z Manuale utente

ACB-4525Z

User's

Manual

5-1/4"

Winchester

Disk

Controller

SCSI

ESDI

adoptee,

inc.

3.0

INSTALLATION

The

ACB-4525Z

self-contained

circuit

board.

All

logical

and

electronic

functions

required

for

its

normal

operation

are

contained

the

circuit

board.

The

ACB-4525Z

simple

install,

operate,

and

maintain.

3.1

UNPACKING

The

ACB-4525Z

shipped

protective

carton

with

shock

absorbing

material

and

static

protecting

material

completely

surrounding

the

card.

The

carton

should

examined

for

external

damage

opened.

The

cards

were

physically

inspected

when

packed.

Any

mechanical

damage

the

cards

should

reported

the

shipper

and

Adaptec

soon

possible.

CAUTION

All

circuit

boards

containing

VLSI

circuitry

have

some

sensitivity

electrostatic

discharge.

The

ACB-4525Z

exception.

Proper

handling

precautions,

including

personnel

grounding

and

work

surface

grounding,

should

taken

prevent

circuit

stress

which

can

cause

premature

circuit

failure.

3.2

PREPARATION

INSTALLATION

AREA

The

ACB-4525Z

generally

designed

into

the

host

system

the

peripheral

disk

system.

Proper

attention

should

given

the

location

the

ACB-4525Z

the

necessary

ventilation,

installation

clearances,

and

cabling

paths

are

provided.

The

power

output

low

enough

that

convective

ventilation

will

sufficient

the

air

and

surrounding

surfaces

are

temperature

degrees

Centigrade

less.

this

requirement

cannot

met

the

system

enclosure

its

worst

case

environment,

then

the

system

enclosure

must

provide

for

appropriate

ventilation

and

cooling.

Care

should

taken

support

the

card

mechanically.

Any

appropriate

combination

the

eight

mounting

holes

provided

can

used,

depending

the

forces

which

the

system

will

sub-

jected.

conductive

material

should

come

contact

with

the

ACB-4525Z.

3-1

Installation

clearances,

for

both

the

ACB-4525Z

and

the

selected

power

and

signal

cabling

configuration,

should

sufficient

optimize

system

cost,

manufacturability,

and

maintainability.

The

ACB-4525Z

emits

small

amount

radio-frequency

signals.

Extremely

sensitive

components,

such

high-bandwidth

analog

sensors,

should

properly

shielded

from

the

ACB-4525Z.

Normal

case

construction

sufficient

shield

the

ACB-4525Z

required

the

FCC.

FCC

compliance

required

and

the

SCSI

leaves

the

box

which

the

ACB-4525Z

installed,

the

high-

frequency

signals

generated

normal

SCSI

operation

may

require

connector

and

cable

shielding.

The

ACB-4525Z

and

all

other

partially

shielded

electronic

devices

are

sensitive

high-power,

high-frequency

electrical

magne-

tic

sources.

The

ACB-4525Z

should

protected

from

such

sources

while

operating.

particular,

unshielded

switching

power

supplies

should

physically

isolated

from

all

electronic

boards

and

their

interconnecting

cables.

External

noise

sources,

such

welding

machines

and

radio

transmitters,

should

similarly

isolated

from

electronic

systems.

Cable

and

connector

shielding

may

required

some

environments.

appropriate

power

source

must

provided.

Care

should

taken

prevent

ground

loops

and

other

power

disturbances.

Proper

programming

support

must

provided

generate

the

required

command

sequences.

Additional

program

support

must

provided

manage

the

SCSI

protocols.

Use

the

advanced

performance-oriented

functions

will

require

powerful

SCSI

host

adapter

that

supports

disconnect/reconnect

and

arbitration.

Use

the

advanced

command

functions

requires

expanded

software

support.

Adaptec's

host

adapters

will

provide

the

required

SCSI

protocol

services,

but

must

receive

the

commands

executed

from

appropriate

system

software.

Many

other

SCSI

systems

are

ava

abl

3.3

INSTALLATrON

The

following

steps

are

required

for

installation

the

ACB-

4525Z

into

system

properly

designed

it.

These

steps

are

separate

from

any

other

testing

and

installation

procedures

required

other

portions

the

system,

but

can

often

done

conjunction

with

those

other

installation

steps.

Inspect

the

ACB-4525Z

for

obvious

physical

installing.

damage

before

Install

proper

jumpers

(see

Section

3.4)

enable

the

desired

ACB-4525Z

functions

and

define

the

address

the

ACB-4525Z

the

SCSI

Bus.

Install

the

ACB-4525Z

with

appropriate

mounting

hardware.

3-2

Make

the

required

cable

connections

the

ACB-4525Z.

The

cable

connections

are:

Power

cable

JO -

SCSI

cable

J3,

J4,

-ESDI

data

cable

(radial

connections

required)

-ESDI

control

cable.

Install

ESDI

drives

according

the

manufacturer's

directions.

The

drives

must

have

appropriate

drive

select

addresses

and

bus

terminators

set.

The

last

ESDI

drive

the

control

cable

daisy

chain

must

terminated.

Power

the

system

and

perform

any

power-on

test

procedures

required

the

system.

Format

the

attached

drives.

(See

Section

3.7.)

NOTE:

A PRODUCTION ENVIRONMENT,

THE

DRIVES

MAY

OPTIONALLY

FORMATTED

A DEDICATED

ACB-4525Z

MANUFACTURING

WORK

STATION

BEFORE

INSTALLATION.

DUE

THE

INTELLIGENCE

ESDI DRIVES,

ALL

PARAMETERS

ARE

STORED

THE

DRIVE

THE

FORMATTING

PROCEDURE,

FURTHER FORMATTING

PARAMETER

SPECIFICATION

NOT

REQUIRED

AFTER

INSTALLATION.

THE

ACB-4525Z

WILL

AUTOCONFIGURE

FROM

THE

DRIVE

PARAMETERS

POWER-ON

TIME.

Perform

appropriate

system

test

and

verification

procedures.

Errors

drive

operation,

ACB-4525Z

operation,

SCSI

operation,

and

certain

installation

errors

will

indicated

through

the

normal

SCSI

error

presentation

mechanism.

3.4

CONFIGURING

THE

ACB-4525Z

The

ACB-4525Z

has

number

options

that

must

selected

the

installation

,of

hardware

jumpers

located

position

the

controller.

The

function

each

jumper

pair

shown.

-------

P o 0 0

Diagnostics

N 0 0 M

Parity

Enable

L 0 0 K

Disable

Unit

Attention

J o 0 I

Start

Spindle

H o 0 G

Enable

Zero

Latency

F o 0 E

SCSI

Address

2'"

D 0 0 C

SCSI

Address

2-1

B o 0 A

SCSI

Address

2-D

-------

3-3

Jumper

settings

for

the

ACB-4525S4000

-------

P o 0 0

Diagnostics

N o 0 M

Parity

Enable

L 0 0 K

Disable

Unit

Attention

J o 0 I

Start

Spindle

H o 0 G

Adaptec

5500/4000

Compatibility

F o 0 E

SCSI

Address

2t' 2

D 0 0 C

SCSI

Address

2~1

B o 0 A

SCSI

Address

2°0

-------

3.4.1

DIAGNOSTIC

MODE

The

installation

the

O-P

jumper

will

cause

the

ACB-4525Z

continuously

repeat

diagnostic

self-test.

See

Appendix

for

details

this

self-test.

3.4.2

PARITY

ENABLE

The

installation

the

M-N

jumper

will

cause

the

ACB-4525Z

check

for

bus

out

(data

into

the

ACB-4525Z)

parity

errors.

This

jumper

should

only

installed

all

SCSI

devices

communicating

with

the

ACB-4525Z

generate

SCSI

data

parity.

The

ACB-4525Z

will

always

generate

parity

bus

data

transfers.

3.4.3

DISABLE UNIT ATTENTION

Normally

the

ACB-4525Z

will

support

SCSI

Unit

Attention.

allow

normal

operation

with

some

hosts

that

not

support

Unit

Attention,

the

installation

the

L K

jumper

will

disable

Unit

Attention

the

CCS

mode.

Unit

Attention

also

not

supported

the

H G

jumper

installed

the

ACB-4525S4000.

3.4.4

START

SPINDLE

Normally,

the

ACB-4525Z

will

issue

a START

SPINDLE

command

power

up.

However,

with

jumper

I-J

installed

the

initiator

must

issue

START

SPINDLE

command

before

the

drive

will

spin

up.

This

feature

allows

the

initiator

control

the

power

sequencing

(and

peak

surge

current)

the

attached

drives.

3.4.5

ENABLE

ZERO

LATENCY

(ACB-4525Z

ONLY)

with

jumper

installed,

the

ACB-4525Z

will

default

zero

latency

option

set

upon

power

SCSI

reset.

This

option

reset

via

mode

select

(page

6-42

responding

Mify

Data

Pointer

message

with

"Message

Reject."

See

4.2.2.2.

3-4

3.4.5.1

ADAPTEC

ACB-5500/4000

COMPATIBILITY

(ACB-4525S4000)

When

jumper

G-H

installed,

operation

the

ACB-4525Z

will

deviate

from

the

Common Command

Set

specification

some

areas.

This

jumper

provides

software

protocol

which

fully

compatible

with

the

ACB-5500

and

ACB-4000

families

hard

disk

controllers.

The

following

short

description

the

command

set

differences.

The

REQUEST SENSE

command

will

return

only

four

bytes

sense

data.

With

the

G-H

jumper

removed,

the

REQUEST

SENSE

command

will

always

return

sense

data

the

extended

sense

format.

The

FORMAT

command

will

allow

the

specification

data

fill

pattern

other

than

6Ch

and

defect

list

may

provided

the

host,

but

will

not

possible

use

the

manufacturer's

supplied

defect

list.

The

REASSIGN

BLOCK

command

not

implemented

for

use

with

the

G-

jumper

installed.

The

INQUIRY command

will

return

a maximum

four

data

bytes.

The

MODE

SELECT

and

MODE

SENSE

commands

will

provide

disk

information

only,

retry

handling

will

specified

through

the

SEND

DIAGNOSTICS

command.

The

READ

and

WRITE BUFFER

commands

are

implemented

vendor-

unique

manner

with

different

codes

than

the

CCS

specification.

For

detailed

information

operation

with

the

G-H

jumper

installed,

see

Appendix

and/or

ACB-4000A

ACB-5500

User's

Manual.

3.4.6

SCSI

BUS

ADDRESS

The

installation

jumpers

A-B,

C-D,

and

E-F

set

the

SCSI

bus

address

for

the

ACB-4525Z.

SCSI

devices

can

have

address

zero

seven,

but

two

devices

the

same

bus

can

have

the

same

address.

3.5

POWERING

THE

ACB-4525Z

Once

the

ACB-452SZ

properly

configured,

the

controller

may

powered

on.

When

power

supplied

the

system,

the

controller

will

enter

power-up

mode

and

wait

for

a maximum

seconds

for

the

drive

become

ready.

During

the

18-second

power-on

sequence,

the

controller

performs

self-test

and

begins

checking

for

drives

and

become

ready.

the

host

sends

command

requiring

access

drive

before

has

become

ready,

DRIVE

NOT

READY

(04h)

error

will

result.

The

controller

will

then

check

for

ready

status

the

command

requiring

access

that

drive.

3-5

the

drive

does

not

come

ready

within

seconds

after

the

controller

powered

on,

the

controller

will

not

perform

automatic

initialization

and

when

the

drive

becomes

ready.

perform

this

function,

the

host

must

use

the

Reinitialize

Drive

option

(60h)

the

Send

Diagnostic

Command.

When

command

received

and

the

drive

ready

but

not

initialized,

the

controller

will

read

the

drive's

configuration

data

before

executing

the

command.

Once

drive

formatted,

the

host

can

determine

the

drive

size

(READ CAPACITY,

25h,

command)

and

self-configure

without

any

driver

software

modification.

3.6

COMMUNICATING

WITH

THE

ACB-4525Z

The

SCSI

bus

simple

bus

interface.

However,

quick

reading

the

SCSI

spec

may

leave

one

lost

due

its

extreme

attention

detail.

AI'so,

some

SASI-like

controllers

exist

the

market

which

allow

some

deviation

from

the

ANSI/SCSI

protocol.

The

important

point

remember

designing

drive

routine

that

once

the

controller

started

the

host,

THE

CONTROLLER

CONTROLS

THE

SCSI

BUS.

The

controller

drives

the

data

direction

line

(I/O),

the

phase

lines

(C/D

and

MSG)

and

initiates

data

transfers

(REQ).

The

host

driver

should

make

assumptions

about

the

bus

phases

byte

counts.

addition,

the

controller

can

(and

will)

change

phases

between

operations

while

going

through

intermediate

phases.

Thus,

the

phase

lines

(C/D

and

MSG)

are

only

valid

when

the

controller

asserts

REQ. Do

not

write

your

driver

allow

your

hardw~re

phases

when

REQ

not

active

may

'fooled'

phase

changes

between

REQ.

Also,

some

other

controllers

only

support

six-byte

commands,

thus

some

users

have

set

counters

their

software

send

six-

byte

command.

Since

the

ACB-4525Z

controller

supports

six-

and

la-byte

commands,

the

hardware/software

should

not

count

out

the

command

bytes

but

rather

should

send

command

bytes

long

the

controller

requests

them.

Trust

the

controller;

'knows'

how

many

bytes

needs.

The

sequence

operations

for

single

command

used

the

simplest

SCSI

applications

would

be:

Select

the

controller

onto

the

bus

(wake

up).

sure

Select

remains

asserted

until

the

controller

responds

Busy.

Send

the

ACB-4525Z

the

appropriate

command

bytes

until

changes

phases

(do

not

count

bytes).

too

many

too

few

bytes

are

REQuested,

check

for

valid

command

code

and

proper

SCSI

REQ/ACK

timing.

ensure

1:1

inter-

leave,

the

maximum REQ/ACK

delay

must

less

than

280

nanoseconds.

3-6

required,

send/receive

data

until

phase

changes

(do

not

count

bytes:

the

controller

will

determine

data

direction)

•

Receive

(REQ/ACK

cycle)

one

status

byte

eval

tion

(see

Section

4.5).

and

save

for

Receive

(REQ/ACK

cycle)

one

message

4.2)

•

byte

(see

Section

Check

error.

status

byte.

Busy

bit

set,

send

REQUEST

set,

resend

command;

SENSE

(03h)

command

get

sample

MODE

SELECT

command

shown

below

for

hard-sectored

drive

with

two

spare

sectors

per

cylinder

allocated

for

slipping

defects.

Mode

Select

Command

not

required

preceding

the

Format

Command

when

using

the

ACB-4525Z.

The

Mode

Select

Command

only

necessary

the

host

desires

modify

any

the

changeable

Mode

Select

parameters.

3-7

Step

MODE

SELECT

COMMAND

Hex

Description

Code

(iSh)

for

MODE

SELECT

Command

for

LUN

Reserved

Number

bytes

appended

(lCh)

Reserved

Extent

Descriptor

List

Reserved

Medium

Type

Reserved

Block

Descriptor

length

Direct

Access

Device

Format

Parameters

Mode

Select

Page

Code

Page

Length

Reserved

Alternate

Sectors

per

zone

(LSB)

Reserved

Track

Skew

(sectors

skew

per

track)

Reserved

After

the

Mode

Select

has

been

transferred

the

controller

and

good

completion

status

has

been

sent

the

host,

the

drive

may

formatted.

3-8

Step

FORMAT

UNIT

COMMAND

Interleave

1:1

Three

spare

sectors

per

cylinder

Hard-Sectored

Drive

FORMAT

UNIT command

Hex

Description

code

(04h

for

FORMAT

UNIT command)

Lun

defect

data

list,

format

with

known

defect

information

from

primary

and

grown

defect

data

lists

maintained

drive

and

controller

and

not

defect

list

from

the

host.

Reserved

High

byte

interleave

(must

00)

Low

byte

interleave

Reserved

The

ACB-4525Z

provides

true

device

independence

automatically

formatting

out

all

media

defects

reading

the

manufacturer's

defect

map

format

time.

The

user

may

specify,

through

the

Mode

Select

command,

the

number

sectors

per

cylinder

left

available

for

future

use

expectation

field

grown

defects.

the

event

grown

defect,

the

Reassign

Blocks

Command

uses

spare

sector

the

same

cylinder,

maximum

cylinder

provide

perfectly

clean

media.

This

intelligent

defect

handling

scheme

eliminates

performance

degradation

due

media

defects.

The

ACB-4525Z

allows

the

user

select

the

desired

interleave

factor

with

the

FORMAT

UNIT

command.

The

interleave

can

range

from

one

the

number

sectors-per-track.

The

number

represents

the

number

physical

rotations

the

disk

which

are

necessary

read

entire

track

data.

3-9

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