Seagate Marathon 420sl Manuale utente

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Marathon 420sl

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(ST9420A, ST9420AG)

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AT Interface Drives

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Installation Guide

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Publication Number: 36305-101, Rev. A

August 1995

Seagate, Seagate Technology and the Seagate logo are regis-

tered trademarks of Seagate Technology, Inc. SeaFAX, Sea-

FONE, SeaBOARD and SeaTDD are trademarks of Seagate

Technology, Inc. Otherproduct namesareregistered trademarks

or 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 permissionfrom Seagate

Technology, Inc.

Contents

Read before you begin

... . . . . . . . . . . . . . . . . . . 1

Configuring the drive . . . . . . . . . . . . . . . . . . . . 2

Attaching cables . . . . . . . . . . . . . . . . . . . . . . . 2

Mounting the drive . . . . . . . . . . . . . . . . . . . . . 4

Configuring your computer . . . . . . . . . . . . . . . . . 5

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

Installation troubleshooting . . . . . . . . . . . . . . . 10

Compatibility notes . . . . . . . . . . . . . . . . . . . . 17

Technical support services . . . . . . . . . . . . . . . . 18

Storing and shipping your drive . . . . . . . . . . . . . 21

Read before you begin

...

Application. This drive uses the ATA interface and is designed

for IBM AT and compatible personal computers. It is intended for

use with UL-listed computers or similar products.

Warning. Turn off the computer (and remove the battery if you

have a notebook or laptop computer) before you

open the case or touch any internal components.

Caution. Special training or tools may be needed to service

laptopandnotebookcomputers.Insomecases,open-

ing the case may void your warranty.

Static discharge. Observe the following precautions:

•Before handling any components, put on a grounded wrist strap.

•Use antistatic padding on all work surfaces.

•Avoid static-inducing carpeted areas.

•Keep the drive in its static-shielded bag until you are ready to

completethe installation.Donotattachanycables tothedrive

while it is in its static-shielded bag.

•Handle the drive by its edges or frame.

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

Drive handling. The drive is extremely fragile—handle it with

care. Do not attach labels to any part of the drive.

Inspection. After you are familiar with the handling precautions

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

your distributor or dealer immediately.

Maintenance and repair. Seagate drives do not require main-

tenance.Thehead/discassemblyissealed;ifyoubreaktheseal,

you void the warranty. Seagate customer service centers are the

Marathon 420sl Installation Guide, August 1995 1

only facilities authorized to repair Seagate drives. Seagate does

not sanction any third-party repair facilities.

Warranty. See your authorized Seagate distributor or dealer.

Configuring the drive

1. Put on a grounded wrist strap. Wear the grounded wrist

strap throughout the installation procedure.

2. Installmaster/slavejumpers.Ina two-drive system, youneed

to designate one drive as the master, or drive 0, and the other

driveastheslave,ordrive1.Todothis,installthemaster/slave

jumpers as shown in Figure 1. In a one-drive system, configure

the drive as a master (no jumpers installed).

Alternatively, you can configure the drive as a master or

slave using the cable select option. Cable selection re-

quires a special daisy-chain cable that grounds pin 28

(CSEL) on one of its two drive connectors. If you attach the

drive to the grounded CSEL connector, it becomes a mas-

ter. If you attach the drive to the ungrounded CSEL con-

nector, it becomes a slave. To use this option, the host

system and both drives must support cable select, andboth

drives must be configured for cable select. To configure a

Marathon 420sl for cable select, install both master/slave

jumpers, as shown in Figure 1.

Attaching cables

This driveis designed for a host computer that supplies interface

signals and +5V power through a single 44-pin connector and

cable. If your computer has a fixed connector that attaches

directly to the drive, skip aheadto the following section, “Mount-

ing the drive.” Otherwise, attach the interface/power cable

as described on page 4.

2 Marathon 420sl Installation Guide, August 1995

Master/slave

configuration

jumpers

Pin 1 Pin 20 removed

for keying Circuit board

B D

A C

Drive is master; slave may be detected using DASP– signal

Drive is master; Seagate slave drive present

Drive is slave; Seagate master drive present

Use CSEL pin grounding to differentiate master from slave



Figure 1. ATA interface connector and master/slave

configuration jumpers

Marathon 420sl Installation Guide, August 1995 3

1. Turn off the computer and remove the battery.

2. Put on a grounded wrist strap.

3. Open your computer case. See your system manual for

instructions.

Caution. Opening the case may void your computer’swarranty.

4. Connect the 44-pin interface/power cable. Match pin 1 of

the cable to pin 1 of the interface connectors on the drive and

on the computer. Pin 1 is usually denoted by a stripe along

one edge of the cable. The location of pin 1 on the drive

interface connector is shown in Figure 1 on page 3. The cable

should be no longer than 18 inches (0.457 meters).

Caution. The printed-circuit cables used in laptop computers

are very delicate. Be careful not to tear them.

Mounting the drive

Mount the drive securely in the computer using M3X0.5 metric

screws in the four bottom mounting holes or the four side mounting

holes. You can mount the drive in any orientation. Be careful not to

strain or crimp the interface/power cable.

Caution. To prevent damage to the drive:

•Be careful not to bend the drive connector pins, especially

when plugging the drive into a fixed connector.

•Use mounting screws of the correct size and length.

•Gently tighten the mounting screws—do not apply more than

3 inch-pounds of torque.

•Do not insert mounting screws more than 0.15 inch.

Note. This drive meets industry-standard MCC mountingspeci-

fications. When installing this drive in a fixed-mounting

4 Marathon 420sl Installation Guide, August 1995

application, you must use MCC-compatible connectors

and mounting hardware. If the mounting holes in your

computer do not line up with the mounting holes on the

drive, your computer may not be MCC-compatible.

Configuring your computer

Before your computer can recognize anew drive,you must enter

basic information about the drive into the computer’s long-term

memory (usually a battery-powered CMOS chip). The com-

puter’s basic input/output system(BIOS) uses this information to

control the flow of data to and from the drive.

Note. Some newer computers can automatically determine your

drive type andconfigurethemselves appropriately at startup.

Read your system manual to determine whether this applies

to your computer. If so, then skip ahead to “Formatting and

partitioning the drive,” on page 8.

If your computer cannot automatically determineyour drive type,

you must run a system setup program to specify the number of

cylinders, heads and sectors for each drive in your system. This

procedure is described on the following page. The table below

listscylinder, headandsectorinformationfortheMarathon420sl.

No. cylinders 988

No. read/write heads 16

No. sectors per track 52

Total no. sectors 822,016

Bytes per sector 512

Capacity (Mbytes):

BIOS calculated 400

Usable 420

Marathon 420sl Installation Guide, August 1995 5

To enter these drive specifications into your systemBIOS, follow

these steps:

1. Turn on your computer.

2. Run the system setup program. This program configures

the system BIOS to recognize your drive. In some computers

you run the system setup program by pressing special keys

while the computer is booting up. In other computers, you can

run the program from the DOS prompt. See your system

manual for more information.

3. Enter your drive specifications. Within the system setup

program, there are three possible ways that you can enter

your drive’s specifications. These are listed below in order of

increasing complexity.

•Select a predefined drive type. Most system setup pro-

grams provide a long list of predefined drive types. Select a

drive type with specifications that match those of your drive

(refer to the table on page 5).

•Specify a

custom

user-defined

drive type. If the

system setup program doesn’t list a predefined drive type

that matches your drive specifications, you may be able to

define a custom or user-defined drive type. You can then

enter your drive specifications (from the table on page 5).

When you enter drive specifications for a custom or user-

defined drive type, the setup program should display a

drive capacity less than or equal to the

BIOS calculated

capacity

in the table onpage 5. This value is slightly lower

than the usable drive capacity.

•Allow your drive to emulate or

translate

one of the

predefined drive types. If none of the predefined drive

types exactly matches your drive, and your system setup

6 Marathon 420sl Installation Guide, August 1995

programdoes not allow youto specify a custom drivetype,

your drive may be able to emulate one of the predefined

drive types. Select a predefined drive type that has a

capacity as close as possible to, but not greater than, the

BIOS calculated capacity of your drive (as shown in the

table on page 5).

Note. If you emulate a drive type with a lower storage capacity

than your drive, you limit the effective capacity of your

drive. For example, a 350-Mbyte drive emulating a

300-Mbyte drive will be limited to 300 Mbytes of storage

capacity.

If you are not sure which drive type to select, try running

the FINDTYPE.EXE utility program. This program is avail-

able from Seagate’s Technical Support services (on the

SeaBOARDcomputerbulletinboard).FindTypecompares

your drive’s geometry with all geometries supported by

your computer’s BIOS. FindType can also determine

whetheranexactmatchexistsbetweenthedrivegeometry

and the system BIOS. If there is no match, FindType

selectstheclosestdrivetypesupportedbyyourcomputer’s

BIOS.

Thesystemsetupprogrammayrequestinformation onthe

drive’s write precomp or landing zone. However, you do

not need to enter any values, since your Seagate drive

does not use these parameters.

Caution. Write down the drive type that you have selected and

any drive specifications that you have entered. Keep

this information in a safe place. You will have to

re-enter this data if your CMOS battery fails.

Marathon 420sl Installation Guide, August 1995 7

Formatting and partitioning the drive

Caution. Formatting or partitioning a drive that contains data

maydestroy alldata onthedrive. Before repartitioning

or reformatting a drive that contains data, make sure

all data on that drive has been safely backed up.

Seagate Technology assumes noliability for lost data.

Low-level formatting

Seagate ATA Interface drives are low-level formatted at the

factory and do not require additional low-level formatting before

use.

Note. If you are installing only a single drive in your computer,

youcanuse theDOSprogramSETUP.EXE(suppliedwith

MS-DOS 5.0 and above) to partitionand formatthe drive.

See your DOS manual for details. After you successfully

run SETUP.EXE, your drive will be readyto use, and you

can skip the partitioning and formatting steps below.

Partitioning

The partitioning process subdivides a single disc drive into

partitions that behave as separate logical drives (labeled C, D,

E, etc.). You can also set up the entire disc as a single partition.

1. Restart your computer. Boot up the computer using a

diskette that contains DOS system files.

2. Run the FDISK program. Insert a DOS program diskette

containing the FDISK program into your diskette drive. At the

DOS prompt, type fdisk and press ENTER. Then follow the

directions on the screen to create one or more partitions. See

yourDOSmanualfordetails.Ifyouarepartitioningadrivethat

will be used to boot the computer, make sure that the primary

partition is marked active.

8 Marathon 420sl Installation Guide, August 1995

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