Seagate ST9235 Family Manual de usuario

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ST9235 Family:

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ST9080A

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ST9145A, ST9145AG

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ST9235A, ST9235AG

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Installation Guide

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Contents

Read before you begin... . . . . . . . . . . . . . . 1

Installation overview . . . . . . . . . . . . . . . . . . . . 2

Setting master/slave jumpers . . . . . . . . . . . . . . . 3

Connecting cables . . . . . . . . . . . . . . . . . . . . . 3

Mounting the drive . . . . . . . . . . . . . . . . . . . . . 5

Configuring system BIOS . . . . . . . . . . . . . . . . . . 5

Formatting and partitioning the drive . . . . . . . . . . . 8

Installation troubleshooting . . . . . . . . . . . . . . . . 9

Appendix A. AT interface connector pin assignments . 11

Appendix B. Mounting dimension drawings . . . . . . . 12

Appendix C. Technical support services . . . . . . . . 15

Publication Number: 36216-001, Rev. B

Seagate®

, Seagate Technology®

, and the Seagate logo are reg-

istered trademarks of SeagateTechnology, Inc.SeaFAX, Sea-

FONE, SeaTDD, and SeaBOARDare trademarks of

Seagate Technology, Inc. Other product names are trademarks

or registered trademarks of their owners.

Seagate reserves the right to change, without notice, product

offerings or specifications. No part of this publication may be

reproduced in any form without written permission of Seagate

Technology, Inc.

Read before you begin

...

Note. Drives in the ST9235 family are usually installed in note-

book or laptop systems. Special training or tools may be

needed to service these computers. In some instances,

opening the case may void your warranty. Be sure to

review the terms and conditions of your system warranty

before opening the system enclosure.

Warning. Always power off and unplug your computer system

before touching any internal components.

Observe static discharge precautions.

•Keep the drivein its static-shieldedbag until you are readyto

complete the installation.

•Do not touch the PC board or the I/O connector pins.

•Always handle the drive by its edges or frame. Never apply

pressure to the PC Board or to the drive’s top cover.

•Use a grounded wrist strap. If none is available, ground

yourself by touching the metal chassis of the system before

handling any components.

•Use antistatic padding on all work surfaces and avoid static-

inducing carpeted areas.

Inspection.When you are familiar withthe handlingprecautions

listed above, inspect the drive. If it appears to be damaged,

contact your distributor or dealer immediately.

Handle drives carefully. Improper handling during transit or

shipping accounts for many installation problems. Even minor

bumpscanexertrelativelylargeGforcesonthesedrives.Always

handle the drive carefully. In addition, do not attach any labels to

the drive top cover, as they may prevent proper ventilation.

ST9235 Family Installation Guide, Rev. B 1

Warranty. Contact your authorized Seagate distributor or dealer

for warranty information.

Maintenance and repair. Seagate drives do not require any

preventive maintenance. The head/disc assembly is sealed and

doesnotcontainanyuser-serviceablecomponents.Tamperingwith

the factory seal voids the warranty. Seagate customer service

centers are the only facilities authorized to service Seagate drives.

Seagate does not sanctionany third-party repair facilities.

Shipping. When transporting or shipping a drive,

you must use

Seagate-approved container. If possible, use an original Seagate

shipping box with a

Seagate Approved Package

label.

Shipping a

drive ina nonapproved container voids the drive warranty.

Seagate service centers may refuse receipt of components

improperly packaged or obviously damaged in transit. Call your

authorized Seagate distributor to purchase additional boxes.

Seagaterecommendsshippingbyanair-ridecarrierexperienced

in handling computer equipment.

Installation overview

Drive installation can be divided into several logicalsteps:

1. Setting master/slave jumpers

2. Connecting cables

3. Mounting the drive

4. Configuring the system BIOS

5. Formatting and partitioning the drive

Each of these steps is describedin detail on the followingpages.

Somemaynotbeapplicabletoyourparticularinstallationrequire-

ments.

2 ST9235 Family Installation Guide, Rev. B

Setting master/slave jumpers

Two drives may be controlled through a single drive controller

cable with two connectors. In this case, one drive is designated

as the masterandtheotheris designated asthe slave. Asshown

in Figure 1 on page 4, the jumpers on each drive must be set to

identify which drive is master and which is slave.

Connecting cables

The ST9235 Family drives use a 44-pin AT interface connector

cable with two rows of 22 female contacts on 0.079 inch (2 mm)

centers (see Figure 1). Pin assignments for the AT interface are

listed in Appendix A.

Most cables have a stripe down one side, which designates pin

1. Make sure pin 1 on the interface cable connector is aligned to

pin 1 on the drive interface connector and pin 1 on the host

connector.Toassistincablealignment,pin20hasbeenremoved

on the male interface connector on the drive. This type of

connector is designed to be used with a keyed cable connector

having a plug in place of pin 20.

Before mounting the drive, be sure that the connecting cable is

long enough to reach the drive, but not so long that it will be

pinched when the system enclosure is replaced. Connecting

cables for the ST9235 family drives must not be longer than 18

inches (457 mm).

Power connections

PowerfortheST9235familydrivesissuppliedthroughthe44-pin

interface connector (see Appendix A for specific pin assign-

ments).

Caution. These drives can accept only +5 volts DC power. Do

not use +12 volts DC power.

ST9235 Family Installation Guide, Rev. B 3

Master/slave

configuration jumpers

Circuit board

Pin 1

Pin 20 removed for keying

Drive is master; no slave present

Drive is master; Seagate slave drive present

Drive is slave; Seagate master drive present

Reserved positions (do not use)

Note. Drive is shown with

circuit board up.

A C

B D

Figure 1. AT interface cable connector and master/slave

configuration jumpers

4 ST9235 Family Installation Guide, Rev. B

Mounting the drive

You can mount (and operate) a ST9235 family drive in any

orientation.However,youmustsecurelyattachthedrivetoarigid

frame using four side-mounting screws or four bottom-mounting

screws.

Caution: To avoid damaging the drive:

•Use M3X0.5

metric

mounting screws

only

•Do not insert mounting screws more than 0.150 inches

(3.81 mm) into the mounting holes (except: 0.190 inches

(4.82 mm) forthebottom-mounting holesof the ST9235A and

ST9235AG).

•Do

not

overtighten the screws (maximum torque: 3 inch-lb).

Allow a minimum clearance of 0.030 inches (0.762 mm) around

the entire perimeter of the drive for cooling airflow.

Mounting dimension drawings for the ST9235 family drives are

provided in Appendix B. As shown in these drawings, some

ST9235 family drives conform to the industry standard MCC

mounting specification. Refer to the

ST9235 Family Product

Manual

(Seagate publication 36206-001) for further details.

Configuring system BIOS

Before the host system can recognize a new drive, you must

enterbasicinformationaboutthedriveintothehostsystemBIOS.

Specifically, you need to know the number of cylinders, heads,

and sectors, as well as the overall capacity of the drive you are

installing. The table on page 6 lists these specifications for the

ST9235 family drives. It is not necessary to understand these

terms to set up the system BIOS.

Read your system documentation or run your system setup

program (described on the following page) to determine which

ST9235 Family Installation Guide, Rev. B 5

drive types your BIOS supports. Another method is to run the

FINDTYPE.EXE utility program, available from Seagate Techni-

cal Support services (on the SeaBOARD BBS) as described in

Appendix C.

The methods used to configure system BIOS vary from system

to system. In many cases you can run a setup program from the

DOS prompt. In other cases, you must initiate BIOS setup by

pressingcertain keys while the system is booting up.

Within the setup program, there are three possible ways that you

can specify your drive type:

•Match your drive specifications (from the table below) with

those of a drive type specified in the setup program.

•Specify a custom or user-defined drive type in the setup

program, then manually enter your drive specifications from

the table below.

•Selectspecifications lower thanthose required for your drive,

and allow your drive to mimic the drive type selected.

Drive Specification ST9080A ST9145A &

ST9145AG ST9235A &

ST9235AG

No. cylinders 823 980 985

No. read/write heads 4 15 13

No. sectors per track 38 17 32

Total No. sectors 125,096 249,900 409,760

Capacity (Mbytes)

BIOS calculated 61.0 122.0 200.0

Usable 64.0 127.9 209.7

When the drive specifications are entered manually as a user-

defined or custom drive type, the BIOS should display a drive

capacity equal to that listed as BIOS calculated capacity in the

6 ST9235 Family Installation Guide, Rev. B

table above. This value will be lower than the usable drive

capacity.

Ina fewsituations, none ofthedrivetypesspecified inyourBIOS

setup program will match your drive, and the setup program will

not provide an opportunity to specify a custom drive type. In this

case, consider the third option describedabove —allowing your

ST9235 family drive to mimic one of the BIOS-supported drive

types.During the BIOS setup process, simply select a drive type

with a capacity that is

less than or equal to

the drive’s BIOS

calculated capacity listed in the table on page 6. This drive type

should have no more than 16 read/write heads or63 sectors per

track. In addition, the total number of sectors for that drive type

(listed in the setup program) should not exceed the number of

cylinderstimesthenumberofread/writeheadstimesthenumber

of sectors per track. In other words:

Total sectors per drive

≤

(

No. cylinders

) ×(

No. read/write heads

) ×(

No. sectors per track

)

BIOS compatibility recommendations

The ST9235 family drives are AT interface compatible drives,

whichconformtoATAspecifications.ThehostsystemBIOSmust

provide support for the AT interface command set. Consult the

system documentation for information on the AT interface within

your system. Several key compatibility issues are discussed

below.

In accordance with ATAspecifications, the BIOS must reset any

emulation/translation parameters after a hard reset is received

from the host.

In some configurations, the ST9235 family AT interface drives

supply 11 bytes of Error Correction Code (ECC) with the Read

Long and Write Long commands. Depending on the drive type,

ST9235 Family Installation Guide, Rev. B 7

your system BIOS may look for 4 bytes of ECC. If your system

BIOS expects 4 bytes of ECC and the drive supplies a different

number of bytes, some drive diagnostic programs may fail,

typically resulting in time-out errors. Consult your system docu-

mentation or call your system dealer or manufacturer for infor-

mation on configuring your system to receive 11 bytes of ECC.

Formatting and partitioning the drive

Caution. Formatting or partitioning a drive that contains data

may result in a partial or complete loss of that data.

Make sure all data has been safely backed up before

repartitioning or reformatting a drive. Seagate Tech-

nology assumes no liability for lost data.

Low-level formatting

SeagateATInterfacedrivesarelow-levelformattedatthefactory

and do not require additional low-level formatting prior to use.

Partitioning

Asingle disc drive can be subdivided into partitions that behave

as separate drives (labeled C, D, E, etc.). Versions of DOS prior

toVersion4.0 are not able to access more than32 Mbytesof disc

space as a single drive. Therefore, drives having a capacity of

over 32 Mbytes

must

be divided into several smaller partitions

for use with these older versions of DOS. Seagate does not

recommend using ST9235 family drives withDOS versions prior to

Version 3.3.

To partition a drive, you must first boot the system usinga floppy

disk that contains system files. Partition the drive using the DOS

FDISKutilityprogram (describedinyourDOSmanual).Ifyouare

partitioning a drive that will be used to boot the system, make

sure that the primary DOS partition is marked active.

8 ST9235 Family Installation Guide, Rev. B

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