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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© 1993 Seagate Technology, Inc. All rights reserved
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
or
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
3
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
1
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
5
J9. Active/passive
termination jumper block
Circuit board
+2.85V to 110 ohms
3
4
1
2
5
6
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
2
3
4
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
12
9
10
7
8
5
6
3
4
13
14
1
2
Circuit board
1 –6
7
8
9
10
11
– 20
Reserved.
Ext. spindle sync.
Clock ground
Remote LED + 
Remote LED –
Reserved. Do not
use.
Pin
17
18
15
16
19
20
J12. Options jumper block
7
8
5
6
3
4
1
2
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