ST412 Interface Controller

ST21M, ST21R

-------------------------------------------------

ST22M, ST22R

-------------------------------------------------

ST412 Interface Controller

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Installation Guide

=================================================

_______________________________________ Seagate

Seagate, Seagate Technology and the Seagate logo are registered

trademarks of Seagate Technology, Inc. INSTALLR is a trademark of

Seagate Technology.

(C)opyright 1990 Seagate Technology Inc.

920 Disc Drive, Scotts Valley, California 95066-4544, USA

Telephone: 408/438-6550

Publication Number: 36127-001, Rev. A

Seagate reserves the right to change, without notice, product

offerings or specifications. This publication, and all material

part of this publication may be copied without written

permission of Seagate Technology, Inc.

PC AT and PC-DOS are registered trademarks of International

Business Machines Corporation. XT is a trademark of International

Business Machines Corporation.

DISK MANAGER and ONTRACK are registered trademarks of ONTRACK

Computer Systems, Inc.

Introduction

The ST21 and ST22 are 16-bit ST412 interface controllers designed

for use in AT-type systems.

* The ST21M and ST22M are designed for use with drives

employing MFM data encoding and a 5.0 Mbit/sec. I/O data transfer

rate. Seagate Technology, Inc. assumes no liability for

installation of an MFM controller with an RLL-certified drive.

* The ST21R and ST22R are designed for drives using RLL

(2,7) data encoding and a 7.5 Mbit/sec. I/O data transfer rate.

Seagate RLL drives are easily recognized by an R after the model

number, e.g., ST157R. Seagate Technology, Inc. assumes no

liability for installation of an RLL controller with an

MFM-certified drive.

* The ST22M and ST22R have an onboard floppy diskette

controller which supports two diskette drives in the following

formats:

- 3.5-inch, 720K Byte/1.44M Byte

- 5.25-inch, 360K Byte/1.2 M Byte

* The ST21 and ST22 have a unique recording format and

therefore require all attached drives to be installed by one of

the processes described in this guide before operation.

This publication may be used with SEAGATE Paired Program drives

or as a controller-only installation guide.

Paired program drives are shipped with a Seagate controller. They

are recognized by a PR label on the drive top cover. Paired

drives are shipped formatted with a small DOS partition

containing the installation program, INSTALLR, which will

low-level format and partition your drive. You must supply the

DOS program. The ST21/ST22 can recognize whether a drive has a

Paired Program software loaded, or has been previously installed.

Paired Program drives with formatted capacities greater than 32

MBytes have DISK MANAGER (customized by ONTRACK for Seagate)

partitioning software loaded. Instructions on installing Paired

Program drives begin in Section 3.0.

---------------------------------------

Before You Begin...

Inspect the controller, drive, cables, mounting

hardware/accessories, documentation and packaging. If any item is

incorrect, missing or appears damaged, contact your Distributor

or Dealer immediately.

Handling: Improper handling during transit/shipping accounts for

many "installation" problems. Prior to installation, handle your

drive/controller carefully.

Observe Static-Discharge Precautions: Keep the drive/controller in

their static-shielded bags until you are ready to complete the

installation. Use a grounded wrist-strap at your workstation; if

unavailable, ground yourself frequently by touching the metal

chasis of the system before handling any components. Avoid

static-inducing carpeted areas.

Shipping: When transporting or shipping a drive or controller, a

Seagate-approved container must be used. Keep your original box.

They are easily identified by a red label identifying them as a

Seagate Approved Package.

Shipping the drive in a non-approved container will void the drive

warranty.

Repair centers may refuse receipt of components improperly

packaged or obviously damaged in transit. Contact your

Distributor to purchase additional boxes. Seagate recommends

shipping by an air-ride carrier experienced in handling computer

equipment.

Maintenance: Seagate disc drives do not require any preventative

maintenance. The head/disc assembly is sealed and does not

contain any user-servicable components. Tampering with the

factory-seal will void the warranty.

1.0 ST21, ST22 Setup and Installation

Caution: Do not handle a drive/controller without observing

static-discharge precautions. A grounded wrist-strap is

preferred; if unavailable, ground yourself frequently by

touching the metal chasis of the system before handling any

components. Do not unpack the drive/controller until you are

ready to complete the installation.

During the formatting process, you will be asked to enter some

simple drive specifications. Refer to Figures 1-2 for basic

specifications. For non-Seagate drives, refer to the

manufacturer's instructions.

Important Note: A Drive Type must be set in the AT system CMOS if

the controller BIOS is disabled. See Section 2.6.

Figure 1: Seagate MFM Drive Setup - ST21M/ST22M

================================================================

ST124 | 21.4 | 4 | 615 | 17 | No | None

ST125 | 21.4 | 4 | 615 | 17 | Yes | None

ST138 | 32.1 | 6 | 615 | 17 | Yes | None

ST151 | 42.5 | 5 | 977 | 17 | Yes | None

ST225 | 21.4 | 4 | 615 | 17 | No | Cylinder

| | | | | | 300

ST252 | 42.8 | 6 | 820 | 17 | Yes | None

ST251 | 42.8 | 6 | 820 | 17 | Yes | None

ST4053| 44.5 | 5 | 1024 | 17 | Yes | None

ST4096| 80.2 | 9 | 1024 | 17 | Yes | None

ST1100| 83.9 | 9 |*1072 | 17 | Yes | None

Figure 2: Seagate RLL Drive Setup - ST21R/ST22R

================================================================

ST138R | 32.7 | 4 | 615 | 26 | Yes | None

ST157R | 49.1 | 6 | 615 | 26 | Yes | None

ST225R | 21.17 | 2 | 667 | 31 | No | None

ST238R | 32.7 | 4 | 615 | 26 | No | None

ST250R | 42.9 | 4 | 667 | 31 | No | None

ST278R | 65.5 | 6 | 820 | 26 | Yes | None

ST277R | 65.5 | 6 | 820 | 26 | Yes | None

ST4144R| 122.7 | 9 | 1024 | 26 | Yes | None

ST1150R| 128.4 | 9 |*1072 | 26 | Yes | None

Data Cylinders: User cylinders are calculated from logical zero,

i.e., 0 to 614 equal 615 cylinders.

* Note: The ST21/ST22 can address a maximum of 16 R/W heads and

1,024 cylinders.

Interleave: Use 1:1 interleave as indicated in installation

routine.

Read/Write Head Parking: A PARK program is preloaded on all

Paired Program drives, PARK.EXE or PARK.COM, which the INSTALLR

software will copy to a diskette during installation. The

following drives require parking before the drive/system is

transported: ST124, ST225, ST225R, ST238R, ST250R. Refer to

Section 2.7.

If your drive is not Paired, see your Distributor/Dealer for a

read/write head parking program.

1.1 Controller Setup

1.1.1 Set Controller BIOS and Drive Address: JP1-JP2

Controllers and add-in boards are installed in the bus slots on

the computer's motherboard. These slots are recognized by the

computer BIOS address number. Each board installed must be

jumpered for a specific address.

C8000h-CBFFFh is the default BIOS address for the ST21/ST22. If

this address is already occupied by another board, use the

jumpers provided to change the Seagate controller to another

address. Refer to Figures 4-5.

When installing the ST21/ST22 in a system already containing a

hard disc controller, The Seagate controller must be jumpered at

a higher BIOS address than the resident controller. See Figures

4-5.

Figure 3: Controller BIOS and Port Addresses

ÚÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄ¿

³ I/O Port ³ ³ ³ BIOS Ad- ³ Hard ³ Diskette ³

³ Address ³ JP1 ³ JP2 ³ dress ³ Drive I/O ³ Drive I/O ³

³ ³ ³ ³ ³ Ports ³ Ports ³

ÆÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍÍÍØÍÍÍÍÍÍÍÍÍÍÍÍÍµ

³ Primary ³ Open ³ Open ³ C8000h to ³ 1F0-1F7 ³ 3F0-3F5 ³

³ ³ ³ ³ CBFFFh ³ 3F6-3F7 ³ 3F7 ³

³ ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄ´

³ ³ Open ³ Shorted ³ CC000h to ³ 1F0-1F7 ³ 3F0-3F5 ³

³ ³ ³ ³ CFFFFh ³ 3F6-3F7 ³ 3F7 ³

ÃÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄ´

³ Secondary ³ Shorted ³ Open ³ D8000h to ³ 170-177 ³ 370-375 ³

³ ³ ³ ³ DBFFFh ³ 376-377 ³ 377 ³

³ ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄ´

³ ³ Shorted ³ Shorted ³ DC000h to ³ 170-177 ³ 370-375 ³

³ ³ ³ ³ DFFFFh ³ 376-377 ³ 377 ³

ÀÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÙ

1.1.2 Floppy Diskette Enable/Disable: JP4 (ST22 Only)

The ST22 features an onboard floppy diskette controller. It is

shipped with the controller enabled, to disable remove the jumper

at JP4.

Note: Most systems will not support the secondary floppy diskette

I/O addresses.

1.1.3 BIOS Enable/Disable Jumper: JP3

The ST21 and ST22 are shipped with the BIOS enabled, JP3 open. To

disable the BIOS, attach jumper at JP3. Refer to Figures 4-5.

1.1.4 Remote LED Connector: J6

The ST21 and ST22 provide for connection to the drive activity

LED found on most AT-type systems. Connect the remote LED cable to

J6.

Figure 4: ST21M/ST21R - No Floppy Diskette Controller

J3 J4 J2

To J2 on To J2 on To J1 on

First Drive Second Drive Both Drives

(Drive C) (Drive D)

ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄ¿ Ýßßßß

³ 1ÄÄLED ³ ÚÄÄÄÄÙ ÚÄÄÄÄÄÄÙ ÚÄÄÅÄÝ JP2

³ øøøø J6 :::::::::: ³ :::::::::::::::: ÀøÄÅÄÝ BIOS

³ 1 ³ 1 ÚÄÄÄÅÄÄ Address

³ ::::::::::ÄÄÄÙ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ³ Ý

³ 1 ³ ³ Ý JP3

³ ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄ BIOS Enable/

³ 1øø ³ ³ Ý Disable

³ 1øø ³ Ý

³ 1øø ÚÄÄÄÄÄÄÄÅÄÄ JP1

³ ÀÄÄÄÄÄÄÄÄÄÄÄÙ ÚÄÄÅÄÝ Hard Drive/

³ ÀøÄÅÄÝ Diskette I/O

³ ððÝð}ÄÄ Aux Drive DC Power J5 ³ Ý Address Select

ÀÄÄÄÄÄ¿ Ü Ü Ü Ü Ü Ü ÜÚÄÄÄÄ¿ Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü ÜÚÄÄÄÄÙ Ý

ÀÄßÄßÄßÄßÄßÄßÄßÙ ÀÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÙ Ý

Figure 5: ST22M/ST22R - With Diskette Controller

J1 J3 J4 J2

Floppy To J2 on To J2 on To J1 on

Diskette First Drive Second Drive Both Drives

ÚÄÄÄÄÙ (Drive C) (Drive D)

³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄ¿ Ýßßßß

³ ³ 1 1ÄÄLED ³ ÚÄÄÄÄÙ ÚÄÄÄÄÄÄÙ ÚÄÄÅÄÝ JP2

³ ³ :: øøøø J6 :::::::::: ³ :::::::::::::::: ÀøÄÅÄÝ BIOS

ÀÄÅÄ :: 1 ³ 1 ÚÄÄÄÅÄÄ Address

³ :: ::::::::::ÄÄÄÙ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ ³ Ý

³ :: 1 ³ ³ Ý JP3

³ :: ³ ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄ BIOS Enable/

³ :: 1øø ³ ³ Ý Disable

³ :: JP4 1øø ³ Ý

³ ÚÄ Floppy Diskette 1øø ÚÄÄÄÄÄÄÄÅÄÄ JP1

³ :ÄÄÄÙ Enable ÀÄÄÄÄÄÄÄÄÄÄÄÙ ÚÄÄÅÄÝ Hard Drive/

³ 1Ù ÀøÄÅÄÝ Diskette I/O

³ ððÝð}ÄÄ Aux Drive DC Power J5 ³ Ý Address Select

ÀÄÄÄÄÄ¿ Ü Ü Ü Ü Ü Ü ÜÚÄÄÄÄ¿ Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü Ü ÜÚÄÄÄÄÙ Ý

ÀÄßÄßÄßÄßÄßÄßÄßÙ ÀÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÄßÙ Ý

1.3 Controller Installation

CAUTION: VERIFY THAT THE POWER IS OFF.

1. Remove the System Cover (Refer to your computer system

manual).

Access to the screws is usually at the back of the system. Save

the screws. Systems vary, but most require you to slide the cover

forward for removal.

2. Verify Correct Controller Jumper Options Selections

Refer to Section 1.1

Note: Normally, drive power is supplied via a power harness from

the system power supply directly to the drive's J3 DC power

connector. The J5 connector on the ST21/ST22 can be used to

provide disc drive power in systems lacking an extra power

harness or for Drive-on-a-Card applications. Refer to figures

4-6.

A cable splitter, often called a Y-cable, may be used to tap off

the diskette drive power cable. They are available from most

Distributors/Dealers.

3. Install the Controller as Illustrated in Figure 6 of the

Seagate Installation Guide (publication # 36127-xxx)

4. Verify correct cable attachment and replace the system cover.

2.0 Preparing to Format Your Drive

Please read this section before proceeding to the formatting

instructions. BE SURE TO BACK UP ANY DRIVE CONTAINING DATA.

FORMATTING AT ANY LEVEL MAY RESULT IN PARTIAL OR COMPLETE LOSS OF

DATA. SEAGATE TECHNOLOGY, INC. ASSUMES NO LIABILITY FOR LOST DATA.

* Always use the same version of DOS throughout the entire

process. On two-drive system, always use the same version of DOS

on BOTH drives.

* For optimum performance, format the drive installed in your

system in the same orientation in which it will be used.

* The ST21 and ST22 have the ability to flash controller error

conditions via the drive front-panel LED. Refer to Section 5.0

2.1 Paired Program Drive Formatting

Paired Program drives are shipped with a small DOS partition

containing Installation software and a README file which has the

latest information for the drive being installed. See Section 3.0

2.2 Non-Paired Drive Formatting

Seagate non-paired drives do not have installation software or

recognizable format. These drives may be installed by following the

procedures in Section 4.0.

2.3 Paired Drives: Less than 32 Formatted MBytes

You will need ONE DOS-bootable diskette that has the boot files from

the version of DOS that you plan to use on your Seagate drive. This

diskette should also contain the FORMAT program provided with DOS,

and sufficient space (approximately 50K Bytes) to save the

installation programs from the hard drive. The diskette must NOT be

write-protected.

2.4 Paired Drives: Greater than 32 Formatted MBytes

You will need TWO Diskettes: One DOS-bootable with the version of

DOS you plan to use; the second diskette with at least 360K

Bytes available to save the installation and DISK MANAGER programs.

The diskette must not be write-protected.

2.5 CMOS Configuration

If you are installing your drive in a PC AT and a hard drive is not

presently attached or operational, the hard drive count in CMOS will

already set to zero.

If a standard hard drive is already attached and operating, it will

be the first drive and the Seagate Paired Program drive will be

Drive 2. It is not necessary to change the CMOS hard drive count

when installing with ST21/22 controllers.

2.6 BIOS Enable/Disable

The ST21 and ST22 are shipped with the BIOS enabled, JP3 open. To

disable the BIOS, attach jumper at JP3. Refer to Figures 4-5.

2.6.1 BIOS Enabled

Drive | Controller BIOS | CMOS Setting

| Address |

================================================================

C | C8000 or CC000 | Set to 0 or a type which

| (Primary I/O) | matches the R/W head and

| | cylinder specifications.

----------------------------------------------------------------

D | C8000 or CC000 | Do not set drive in CMOS

| (Primary I/O) |

----------------------------------------------------------------

C or D | D8000 or DC000 | Do not set drive in CMOS

| (Secondary I/O) |

2.6.2 BIOS Disabled

Set all hard drives attached to the ST21/ST22 in the system CMOS

to a type that matches the Read/Write head and cylinder

specifications.

Remove jumpers JP1 and JP2, and attach jumper to JP3.

Important Note: The ST21/ST22 must be the primary controller

(i.e., DRIVE C:) when running with the BIOS disabled.

2.7 Read/Write Head Parking

A read/write head parking program, PARK.EXE or PARK.COM, is

preloaded on all Paired Program drives.

The following drives require running this PARK.EXE or PARK.COM

program before the drive/system is transported: ST124, ST225,

ST225R, ST238R, ST250R

If your drive is not Paired, see your Distributor/Dealer for a

read/write head parking program.

2.8 AT Systems with 40-Pin Hard Drive Interface (IDE)

Some newer AT systems have a 40-pin hard drive AT interface

connector on the motherboard. On most systems, the AT interface

connector must be disabled before the ST21/ST22 can be installed.

Refer to the hardware installation manual supplied with your

system to determine the interface enable/disable requirements.

The ST21/ST22 can operate concurrently with an installed 40-pin

drive, however the ST21/ST22 BIOS must be enabled and the JP1-JP2

jumpered to operate at the secondary address. Refer to Section

2.6.

3.0 Paired Program Installations

Read Sections 1-2 before beginning any formatting. The entire

software installation routine is menu-driven and takes from 10 to

thirty minutes, depending on drive size. For specific DOS

questions, refer to the DOS manual supplied with your system.

After the format is completed, the read/write heads will be

parked. At the next power-up, the system will boot from the hard

disc.

3.1 Paired Program Formatting

Place a DOS-bootable diskette (to boot simply means to start the

system) in Drive A and switch the power on and follow the

instructions displayed on the screen. Type:

C:INSTALLR C

If your are installing a second drive, type:

D:INSTALLR D

If you are installing a drive with DISK MANAGER software, and you

already have a hard disc in your system, you must copy the

DMDRVR.BIN and CONFIG.SYS files from the DISK MANAGER diskette to

the root directory of the existing (first, or boot) drive.

If you already have a CONFIG.SYS file on the boot drive, update

the file to include the following line: DEVICE=DMDRVR.BIN

Refer to your DOS manual for instructions on editing the

CONFIG.SYS file. DISK MANAGER also provides help files which you

may print using the standard DOS print commands.

4.0 Non-Paired Drive Formatting

Use this procedure for non-Paired drives or when using a Paired

drive whose installation software files were lost or not copied

before formatting.

BE SURE TO BACK-UP ANY DRIVE CONTAINING DATA. FORMATTING AT ANY

LEVEL MAY RESULT IN PARTIAL OR COMPLETE LOSS OF DATA. SEAGATE

TECHNOLOGY, INC. ASSUMES NO LIABILITY FOR LOST DATA.

Always use the same version of DOS throughout the entire process.

On two-drive systems: Always use the same version of DOS on both

drives. When adding a second drive, it is sometimes necessary to

reformat the first drive.

4.1 Low-Level Physical Format Using BIOS Facility

When using the system DEBUG to format in an AT system, the CMOS

or system setup should be set to 0 (i.e., no hard drive

installed).

1. Boot the system from the DOS system diskette

2. At the A: prompt, insert the system DEBUG diskette and

type:

DEBUG

<ENTER>

3. To access the controller's format routine; at the"-"

prompt, type:

G=XXXX:5 (Where XXXX is the BIOS base address). The

most common BIOS address is C8000 (e.g., G=C800:5)

Note: Seagate controllers will step you through the

process. Refer to the drive charts, Figures 1-2, for

correct drive parameters.

DISK MANAGER is supplied with Seagate MFM and RLL

drives having greater than 32 formatted megabytes.

It can be used as an alternative to FDISK and FORMAT

to partition and high-level format drives.

Use FDISK and FORMAT on your DOS diskette with drives

having less than 32 formatted megabytes, or if you do

not want to use DISK MANAGER.

Note: Some versions of DOS have other names for FDISK

and FORMAT (e.g., HDFORMAT). Refer to HARD DISC

INSTALLATION in your DOS manual.

4.2 Low-Level Format With Controller BIOS Disabled

If you are running the ST21/ST22 with its BIOS disabled, use the

low-level format utility supplied with your system. A drive

interleave of 1:1 should be selected.

5.0 Troubleshooting Your Installation

5.1 Controller Error Codes

The ST21 and ST22 will flash controller error conditions via the

drive activity LED. The code will repeat at about 1 second

intervals.

Error information is flashed only at power-up or soft boot. The

LED will repeat the error flashes until the condition is

corrected or the system is powered down.

Error code numbers 2 through 6 are fatal error. If you receive

any of these messages, contact your Distributor/Dealer.

Controller Error | Controller Error Condition

Codes (LED Flashes)|

=================================================================

1 | Normal completion of controller diagnostics

-----------------------------------------------------------------

2 | Failure of hard disc drive interface

-----------------------------------------------------------------

3 | Sector Buffer error

-----------------------------------------------------------------

4 | Controller task file interface failure

-----------------------------------------------------------------

5 | Microcode ROM checksum error

-----------------------------------------------------------------

6 | Controller ECC circuits failure

-----------------------------------------------------------------

5.2 Common System/Controller Problems

If you have a problem getting the initial screen, or later

getting the system to boot:

* Check the cabling between the controller and drive. Pin-1 on

the controller always corresponds to Pin-1 at the drive

connector. Most cables have a contrasting color on the cable to

indicate Pin-1.

* Check the power cable to the drive. Can you hear the drive

spin-up?

* Verify CMOS settings

* Verify correct controller BIOS Address. If you have more

than one board that uses BIOS ROM space, each must be set to a

different memory address. Addressing multiple boards at the same

address can cause problems of a indeterminate nature.

* Low-level formatting takes too long or never completes:

Format again. Make sure correct drive parameters were entered and

cable connections are correct.

* FDISK or Partitioning Error Messages: "Error reading fixed

disc," "No fixed disc present": Check correct drive parameters

entered. Refer to pages 3-4 (Section 1.0) Turn the system off and

power-up again.

* High-Level Format Error Message: "Invalid drive

specification": Check drive parameters and controller jumpers.

Run FDISK and high-level format again.

* Drive fails to recalibrate or test Ready: Verify correct

installation, cables and drive select jumper.

* After formatting with DISK MANAGER, your system does not

recognize the D, E, F ... partitions: First, make sure that you

boot from the hard drive. If you still cannot access these

partitions, check that the DISK MANAGER device driver, DMDRVR.BIN

is in the root directory of the C: (boot) drive. Verify that the

CONFIG.SYS file contains the following line: DEVICE=DMDRVR.BIN

If you experience problems accessing your DOS partitions after

installation, refer to the help files provided with DISK MANAGER.

For system or operating system help, contact your computer

manufacturer. For additional installation support, contact your

authorized Seagate Distributor/Dealer.

- End of File -

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