Seagate ST3390N User manual

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ST3390N, ST3655N

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SCSI Interface Drive

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Installation Guide

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Publication Number: 36235-001, Rev. A

June 1993

Seagate®, Seagate Technology®, and the Seagate logo are

registered trademarks of Seagate Technology, Inc. SeaFAX,

SeaFONE, SeaBOARDand SeaTDDare trademarks of

Seagate Technology, Inc. Other product names are registered

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 permission from Seagate

Technology, Inc.

Contents

Read before you begin

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

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

Attaching cables . . . . . . . . . . . . . . . . . . . . . . 5

Mounting the drive . . . . . . . . . . . . . . . . . . . . . 8

CMOS setup for AT systems . . . . . . . . . . . . . . . . 10

Physical geometry for non-DOS operating systems . . . 10

Low-level formatting . . . . . . . . . . . . . . . . . . . . 10

Partitioning . . . . . . . . . . . . . . . . . . . . . . . . . 11

High-level formatting . . . . . . . . . . . . . . . . . . . . 11

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 12

Technical support services . . . . . . . . . . . . . . . . . 16

Read before you begin...

Application. Your drive is designed for IBM AT and compatible

personal computers, Sun, Macintosh and other SCSI systems.

Turn off the system power before attempting any installation.

Static discharge. Observe the followingprecautions:

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

complete theinstallation.Donot attachany cablestothedrive

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.

•Before handling any components, put on a grounded wrist

strap, or ground yourself frequently by touching the metal

chassis of a computer that is plugged into a grounded outlet.

•Use antistatic padding on all work surfaces.

•Avoid static-inducing carpeted areas.

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

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

Inspection. Once you are familiarwith the handlingprecautions

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

your distributor or dealer immediately.

Warranty. See your authorized Seagate®distributor or dealer.

Maintenance and repair. Seagate drives do notrequire mainte-

nance. The head/disc assembly is sealed; if you break the seal,

you voidthe warranty. Seagate customer servicecenters are the

only facilitiesauthorized to repairSeagate drives. Seagate does

not sanction any third-party repair facilities.

Shipping. Keep your original box and packing materials for

transporting or shipping your drive. The box has a

Seagate

Approved Package

label. Shipping a drive in a nonapproved

container voids the warranty. Call your authorized Seagate dis-

tributor to purchase additional boxes.

ST3390N, ST3655N Installation Guide, Rev. A 1

Radio and television interference. This product complies with

ClassBlimitsforradionoiseemissionsfromcomputerequipment

as set out in the radio interference regulations of the Canadian

Department of Communications.

Le présent appareil numérique n′émet pas de bruits radioélectriques

depassant les limites applicable aux appareils numériques de Classe B

prescrites dans le règlement sur le brouillage radioélectrique edicté par

le Ministère des Communications du Canada.

Sicherheitsanleitung

1. Das Gerrät ist ein Einbaugerät, das für eine maximale Umegebung-

stemperatur von 55°C vorgesehen ist.

2. Zur Befestigung des Laufwerks werden 3 Schrauben 6-32 UNC-2A

benötigt. Bei seitlicher Befestigung darf die maximale Länge der

Schrauben im Chassis nicht mehr als 3,3 mm und bei Befestigung an

der Unterseite nicht mehr als 5,08 mm betragen.

3. Als Versorgungsspannugen werden benötigt:

+5V ± 5% 0,5A

+12V ± 5% 0,5A (1,9A fur ca. 30 Sek. fur ±10%)

4. Die Versorgungsspannung muβSELV entsprechen.

5. Alle Arbeitendürfen nurvon ausgebildetemServicepersonal durchge-

führt werden.

6. Der Einbau des Drives muβden Anforderungen gemäβDIN IEC

950V DC 0805/05.90 entsprechen.

Configuring the drive

Select the appropriate drive features by installing or removing

jumpers on the drivecircuit board accordingto the instructions in

Figure 1 on page 6 and Figure 2 on page 7. Refer to your host

adapter documentation forterminator specificationsand configu-

ration instructions.

1. Setting the SCSI ID. Each device on the bus must have a

unique SCSIID. If you are installing only one drive,use SCSI

ID 0 (no jumper installed). If you install a second drive, you

can use any ID (SCSI ID 1 is recommended). SCSI ID 7 is

usually reserved for the SCSI host adapter. To set the

2 ST3390N, ST3655N Installation Guide, Rev. A

SCSI ID, install jumpers on the SCSI ID jumper block as

shown in Figure 1 on page 6.

2. Installing or removing terminating resistors. SCSI I/O

termination consists of three resistor packs, called termina-

tors, that plug into sockets on the printed circuit board. The

terminating resistors are shown in Figure 1.

If you are installing only one drive, leave the terminators

installed. If you are installing multiple drives, remove the

terminators from all drives except the drive connected to the

end of the cable.

3. Installingjumpers ontheterminator powersource jumper

block.Ifyouremovedtheterminatingresistorsinstep2,install

a jumper on pins 2 and 4 of the terminator power source

jumper block shown in Figure 1.

Note. Installing a jumper on pins 2 and 4 of the terminator

power source jumper block does not disconnect the

terminating resistors from the circuit. If your application

requiresnoterminatingresistors,youmustunplugthem

from the drive circuit board as discussed in step 2.

To select the drive power connector as the termination power

source for the resistor packs, install a jumper on pins 1and 3

of the terminator power source jumper block.

ToselecttheSCSIconnectorastheterminationpowersource

for the resistor packs, install a jumper on pins 1 and 2 of the

terminator power source jumper block.

To provide terminator power to the SCSI connector from the

drive power connector only, install a jumper on pins 3 and 4

of the terminator power source jumper block.

To provide terminator power to the SCSI connector and the

drive terminator packs, install jumpers on pins 1 and 2 and

pins 3 and 4 of the terminator power source jumper block.

ST3390N, ST3655N Installation Guide, Rev. A 3

4. Installing jumpers on the active/passive termination

jumper block. If you removed the terminating resistors from

the drive accordingto the instructions instep 2, skip this step.

If you are either:

•using Fast SCSI transfer rates, or

•

not

using Fast SCSI transfer rates, and both ends of the I/O

cable are terminated by resistors of equal value,

use

active

termination by installing a jumper on pins 1 and 2

of the active/passivetermination jumper block, as specified in

the following table.

Fast SCSI SCSI

Termination Active Active or passive

Terminator

specification 110 ohms 110 ohms or

220/330 ohms

Install active/passive

termination jumpers Pins 1 and 2 Pins 1 and 2

Pins 2 and 4

Pins 5 and 6

Ifthehostadaptercontains220/330-ohmresistorsthatcannot

beremovedandreplacedwith110-ohmresistors,setthedrive

termination power to 220/330ohms.Removethe jumper from

pins 1 and 2 and install jumpers on pins 2 and 4 and pins 5

and 6 of the active/passive termination jumper block. Then,

replacethe 110-ohm terminators provided with the drive with

220/330-ohm terminators.

4 ST3390N, ST3655N Installation Guide, Rev. A

Attaching cables

Refer to Figure 1 on page 6 and Figure 2 on page 7 for the

locations of the connectors and jumper blocks.

1. Turn off the system power.

2. Put on a grounded wrist strap.

3. Connecting a remote LED. Remote LED pins are located on

two separate jumper blocks: the options jumper block andthe

user-configurationjumperblock.Attachatwo-pinremoteLED

connector to either jumper block, as follows:

•User-configuration jumper block: pins 9 and 10

•Options jumper block: pins 7 and 8

4. Synchronizing drive spindles (disc arrays only). You can

synchronize the spindle motors of an array of drives by con-

necting a twisted pair to each drive. The maximum cable

length is 6 feet (1.8 meters).

Spindle synchronization pins are located on two separate

jumper blocks—the options jumper block and the user-con-

figuration jumper block. Use either jumper block to synchro-

nize an array of drives, as follows:

•User-configuration jumper block. Use one strand of the

twisted pair to connect together pin 7 of the user-configura-

tion jumper block of each drive. Use the other strand to

connect together pin 8 of the user-configuration jumper

block of each drive.

•Options jumper block. Use one strand of the twisted pair

toconnecttogetherpin5oftheoptionsjumperblockofeach

drive. Use the other strand to connect together pin 6 of the

options jumper block of each drive.

5. Attaching the power cable. Attach a system power cable to

the drive power connector.

ST3390N, ST3655N Installation Guide, Rev. A 5

4

SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 7

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

MSB

2

J5. SCSI ID

jumper block

J4. Interface

connector (pin 1)

Circuit

board

Circuit

board

J3. DC power connector

+5V

+5V return

+12V return

+12V

1234

Ground

Signal

6

J9. Active/passive

termination jumper block

Circuit board

+2.85V to 110 ohms

3

1

5

LSB

Terminating

resistor

packs

(pin 1)

Circuit board

Power and ground to

220/330 ohms

J6. Terminator power

source jumper block



From SCSI connector

1

3

From power connector

and to SCSI bus

From power connector

Terminating resistors

not installed

To SCSI connector only

Figure 1. Back view

6 ST3390N, ST3655N Installation Guide, Rev. A

J8. User-configuration jumper block

11

9

7

5

3

13

1

Circuit board

–6

7

8

9

10

–

20

Reserved.

Ext. spindle sync.

Clock ground

Remote LED + 

Remote LED –

Reserved. Do not

use.

17

15

19

J12. Options jumper block

7

5

3

1

Circuit board

Pin Function

1 Ground

2 Parity enable

3 Ground

4 Remote start enable

5 Clock ground

6 External spindle sync.

7 Remote LED – 

8 Remote LED +

Function

Figure 2. Front view

ST3390N, ST3655N Installation Guide, Rev. A 7

6. Attaching the 50-pin SCSI interface cable. Attach one end

of the cableto the drive interface connector and the other end

to the interface connector on the host system motherboard or

the host adapter. If you are installing multiple drives, use a

daisy-chain cable.

Verify that pin 1 of the interface cable is matched to pin 1 of

the interface connector on the drive and on the host. Pin 1 is

usually denoted by a stripe on the side of the ribbon cable.

The location of pin 1 ofthe driveinterface connector is shown

in Figure 1 on page 6.

Mounting the drive

You canmount the drive inany orientation. Follow theguidelines

below for either bottom mounting or side mounting. Figure 3

showstherecommended mountingorientationsandtheoptimum

placement of mounting screws.

Caution. If you use a screw that is too long, you could damage

the drive. Do not insert the bottom mounting screws

more than 0.20 inches (6 turns) into the drive frame.

Do not insert the side mounting screws more than

0.13 inches (4 turns) into the drive frame.

Bottom mounting holes. Use 6-32 UNC-2A screws in three of

the four availablebottom mounting holes as shown in Figure 3.

Side mounting holes. Use 6-32 UNC-2A screws in three of the

six available side mounting holes as shown in Figure 3.

8 ST3390N, ST3655N Installation Guide, Rev. A

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