Seagate ST5660N User manual

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ST5660N
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SCSI Interface Drive
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Installation Guide
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© 1994 Seagate Technology, Inc. All rights reserved
Publication Number: 36269-001, Rev. A, June 1994
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............................................................... 3
Attaching cables......................................................................7
Mounting the drive................................................................... 8
Physical geometry for non-DOS operating systems ......... 10
CMOS setup for AT systems ................................................10
Low-level formatting..............................................................11
Partitioning.............................................................................11
High-level formatting.............................................................12
Basic troubleshooting ..........................................................13
Advanced troubleshooting...................................................15
Technical support services ..................................................18
Storing and shipping your drive .......................................... 20

Read before you begin...
Application. YourSeagate® drive is designed for IBM and IBM-
compatible personal computers, Sun, Macintosh and other sys-
tems using the SCSI interface.
Turn off the system power before attempting any installation.
Static discharge. Observe the following precautions:
•Keep the drive in its static-shielded bag until you are ready to
complete theinstallation.Donotattachany cablestothedrive
while it is in its static-shielded bag.
•Handle the drive by its edges or frame, and 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. 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.
Warranty. See your authorized Seagate distributor or dealer.
Maintenance and repair. Seagate drivesdo not require mainte-
nance. The head/disc assembly is sealed; if you break the seal,
you voidthe warranty. Seagate customer service centers are the
only facilitiesauthorized to repair Seagate drives. Seagate does
not sanction any third-party repair facilities.
ST5660N Installation Guide, Rev A 1

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.
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 4 Schrauben 6-32 UNC-2A
benötigt. Bei seitlicher Befestigung darf die maximale Länge der
Schrauben im Chassis nicht mehr als 5,08 mm und bei Befestigung
an der Unterseite nicht mehr als 5,08 mm betragen.
3. Als Versorgungsspannugen werden benötigt:
+5V ± 5% 0,65A
+12V ± 5% 0,45A (1,9A fur ca. 10 Sek. fur ±10%)
4. Die Versorgungsspannung muβSELV entsprechen.
5. Alle Arbeitendürfen nurvonausgebildetem Servicepersonaldurchge-
führt werden.
6. Der Einbau des Drives muβden Anforderungen gemäβDIN IEC
950V DC 0805/05.90 entsprechen.
2 ST5660N Installation Guide, Rev A

Configuring the drive
Select the appropriate drive features by installing or removing
jumpers on the drive circuit board shown in Figure 1 on page 4
and according to the instructions in Figure 2 on page 5. Refer to
your host adapter documentation for terminator specifications
and configuration 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
SCSIID,install jumpers on options jumper blockJ8 asshown
inFigure2onpage5,andleaveallpinsofJ5open.Forspecial
applications, you can use J5 to set the SCSI ID (see Figure 3
on page 6); inthese cases,leavetheSCSIIDpinsofJ8 open.
For details, refer to the
Seagate ST5660N Product Manual ,
publication number
36245-00x .)
2. Terminatingresistors.ThedrivesupportsFastSCSItransfer
rates and contains 110 ohm resistors for active termination.
(The drive uses single-ended drivers and receivers.) These
resistors can be enabled or disabled as required.
If you are installingonly one drive, and your system contains
only one initiator (for example, a stand-alone host adapter),
enable active termination by leavingpins 19 and20 of jumper
block J8 open.
If you are installing multiple drives in a daisy-chain, disable
active termination on all drives not at a cable end. Do this for
each intermediate ST5660N drive by installing a jumper on
pins 19 and 20 and on pins 23 and 24 of J8.
ST5660N Installation Guide, Rev A 3

J3. Standard
power connector
1234
J1. Interface
connector
+5V
+5V return
+12V return
+12V
Circuit
board
pin 1
J8.
Options 
jumper block
pin 1 J5.
Auxiliary
selection
for
SCSI ID
Figure 1. Connector and jumper block locations
4 ST5660N Installation Guide, Rev A

SCSI ID 0
SCSI ID 1
SCSI ID 2
SCSI ID 3
SCSI ID 4
SCSI ID 5
Notes:
1. All other pins
are reserved. Do
not use them.
2. Jumpers on
pins 28–30 and
32–34 are
spares; these
pins do not
require jumpers.
SCSI ID 6
SCSI ID 7
Remote LED 
connection
Reserved 
Do not use
Remote start
Parity enable
Terminator 
disable
Power from drive
power connector
Power from 
SCSI bus
Power from drive
power connector
and to SCSI bus
Power to SCSI
bus only
J8. Options jumper block Circuit
board
11
12
9
10
7
8
5
6
3
4
13
14
1
2
15
16
17
18
19
20
21
22
33
34
31
32
29
30
27
28
25
26
23
24
Spares
Figure 2. Options jumper settings
ST5660N Installation Guide, Rev A 5

pin 1
J5.
SCSI ID
SCSI ID 0
SCSI ID 1
SCSI ID 2
SCSI ID 3
SCSI ID 4
SCSI ID 5
SCSI ID 6
SCSI ID 7
Circuit board
bottom view
2
1
4
3
6
5
Figure 3. J5. Auxiliary block for SCSI ID
6 ST5660N Installation Guide, Rev A

3. Installingjumpersontheterminatorpowersourcejumper
block. Toselecttheterminationpowersource,installjumpers
for the appropriate case as follows:
•To provide terminator power to the SCSI connector and the
driveterminatorpacks,installjumpersonpins21and23and
on pins 22 and 24 of J8. This is the default case.
•To select the drive power connector as the termination
power source forthe resistor packs, installa jumperon pins
23 and 24 of J8.
•To select the SCSI connector as the termination power
source for theresistor packs, install ajumper onpins 21 and
23 of J8.
•To provide terminatorpowerto theSCSI connector fromthe
drive power connector only, install a jumper on pins 22 and
24 of J8.
Attaching cables
Figure 1on page4 showsconnectorandjumperblocklocations.
1. Turn off the system power and put on a grounded wrist
strap before proceeding.
2. ConnectingaremoteLED.(Optional)ConnectaremoteLED
to pins 9 and 10 of jumper block J8. Pin 9 is ground.
3. Attaching the power cable. Attach a system power cable to
the drive power connector J3.
4. Attaching the 50-pin SCSI interface cable. Attach one end
of the cable to the drive interface connector J1 and the other
end to the interface connector on the host system mother-
ST5660N Installation Guide, Rev A 7

board or the host adapter. If you are installing multipledrives,
use a daisy-chain cable.
Verify that pin 1 of the connector on each end of the interface
cable aligns with pin 1 of its matchingconnector 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 is shown in
Figure 1.
Mounting the drive
You can mount the drive in any orientation. Use the following
guidelines for either bottom mounting or side mounting. Figure 4
on page 9 shows mounting hole locations.
Caution. Use of mounting screws that are too long can damage
the drive. Do not insert a bottom mounting screwmore
than 0.20 inches (6 turns) into the drive frame. Do not
insert a side mounting screw more than 0.20 inches
(6 turns) into the drive frame.
Bottom mounting holes. Use 6-32 UNC-2A screws in four of
the four availablebottom mounting holes as shown in Figure 4.
Side mounting holes. Use 6-32 UNC-2A screws in four of the
six available side mounting holes as shown in Figure 4.
8 ST5660N Installation Guide, Rev A

Figure 4. Mounting hole locations
ST5660N Installation Guide, Rev A 9

Physical geometry for non-DOS operating
systems
When installing the drive in systems not using MS-DOS or
PC-DOS, use the following information to configure your host
system:
Data cylinders 3,002
Spare cylinders 2
Read/write heads 4
Total sectors 1,065,036
Spindle speed (RPM) 4,500
CMOS setup for AT systems
For drives used in IBM PCs or compatibles:
After mounting and cabling the drive, you must configure the
computer to operate with the drive. This is done using the
computer’s CMOS SETUP routine, which enables you to define
a new drive for the system BIOS. However, because the SCSI
host adapter BIOS handlesall I/O procedures, do not define the
drivetypein the system BIOS. Instead, set the CMOS parameter
for drive type to drive type zero, or the
no hard drive installed
option.
Note. If you are installing your drive in an AT system and a hard
drive is not presently installed, the CMOS drive type is
already set to zero, or the
no hard drive installed option.
10 ST5660N Installation Guide, Rev A

Low-level formatting
Yourdrive waslow-level formattedat the factoryto 512bytes per
sector. In most applications, you do not have to format it again.
However, you may need to low-level format the drive to make it
compatible with your SCSI host adapter or to change the inter-
leave. See your host adapter manual for details.
Ifyouchoosetolow-levelformatyourdrive,usetheDOSDEBUG
utility. The most common DEBUGlow-level formattingcommand
is: g=c800:5. Verify the BIOS address (c800) and the offset (5)
with your host adapter manual.
Caution. Performing either a low-level format or a high-level
format on a drive erases all data on it. Save all files to
a different storage device before formatting a disc
drive. Seagate assumes no liability if you destroy your
data.
Partitioning
If you are using a version of DOS earlier than Version 4.0, the
effective capacity of each drive is limited to about 32 Mbytes.
Therefore, you must divide higher-capacity drives into individual
logical drives, called partitions. Each partition is assigned a
differentletter,forexample,CandDforadrivewithtwopartitions.
Regardless of the DOS version you are using, you need to
preparethedrivebywritingpartitioninginformationonit.Afteryou
have configured the drive and defined it in the CMOS, boot the
system from the diskette drive with a bootable DOS diskette.
Then,runtheFDISKutility(DOSVersion3.3orhigher)topartition
ST5660N Installation Guide, Rev A 11

thedrive.Makesure theprimarypartitionisactive.SeeyourDOS
manual for instructions.
Caution Partitioning a drive erases all data on it. Before parti-
tioning a disc drive, first save all files to a different
storage device. Seagate assumes no liability if you
destroy your data.
Many Unix-based operating systems allow you to partition the
drive for DOS applications. See your system manual for details.
High-level formatting
High-level formatting verifies the information written by the low-
levelformatandestablishesdriveaccessinformationusedbythe
operating system. High-level formatting creates the File Alloca-
tion Table used by DOS to access the drive.
To high-level format the drive, perform the following operations:
1. Use the FORMAT utility to high-level format the drive. Refer
to your DOS manual for the FORMAT command options.
2. Ifyouareformattingthebootdrive,copythenecessarysystem
files to the drive.
In Unix, high-level formatting creates the i-node used for file
access information. Drive formatting and partitioning are both
performed by a singleoperatingsystem utility. Refer to yourUnix
system documentation for instructions.
12 ST5660N Installation Guide, Rev A

Basic troubleshooting
Before you begin troubleshooting, read all the suggestions dis-
cussedinthefollowinglist;theyresolvethemajorityofinstallation
problems.
Warning. Alwaysturn off the systembefore changing jumpersor
unplugging cables and cards.
•Verify compatibility. Reread the documentation for the host
adapter and the drive to confirm that these components are
appropriately matched to each other and to your computer.
•Verify your configuration. Usingthe instructions in the drive
and host adapter installation guides, make sure all jumpers
are installed (or removed) to suit your application.
•Check the power supply specifications. The output of your
power supply may not meet the requirements of the new
devices you are installing. If you are not sure whether your
power supply meets your needs, consult your dealer.
•Check all cards. Make sure all cardsare seated intheir slots
onthemotherboard;then securethem withmountingscrews.
•Verify the CMOS drive type. The CMOS drive type parame-
ter must be set to a value of zero in AT systems.
•Check all cables. Make sure all cables are securely con-
nected. Ribboncables are especially fragile. Make sure they
arenotcrimped ordamagedinanyway.Keepingextracables
on hand for troubleshooting saves time and frustration.
Foreach ribbon cable, verify that pin1 of the cable alignswith
pin 1 of the connector. Pin 1 is usually denoted by a stripe on
the side of the ribbon cable.
ST5660N Installation Guide, Rev A 13

Caution. Do not randomly reverse-plug thecables. This may
damage some systems.
When connecting the diskette drive, make sure you use a
control cable for a diskette drive and not a hard drive. Unlike
theharddrivecable,thediskettedrivecontrolcablehasseven
lines split and twisted.
•Check the BIOS memory address. Make sure the address
you typed during DEBUG agrees with the address you se-
lected with the host adapter BIOS address selection jumper.
Assuming you haveconfigured the host adapter correctly and
a memory conflict exists, the problem may be that the host
adapter is trying to use the same BIOS memory address as
another peripheral on your system. The easiest solution is to
try all possible BIOS addresses.
If the memory conflict persists, isolate the conflict by discon-
necting all other peripherals (except the video card) and
installing the drive and the host adapter separately from the
other components. Then, install the other peripherals one at
a time until the conflict resurfaces.
After you have isolated the source of the addressconflict, you
can resolve the conflict either by changing the BIOS address
of the peripheral that appears to cause the conflict, or by
changing the BIOS address of the host adapter.
•Check for viruses.
Before you load new software, scan the
diskette for viruses.
14 ST5660N Installation Guide, Rev A

Advanced troubleshooting
If you have performed the preceding basic checks but the prob-
lem has not been solved, follow these guidelines for analyzing
specific cases:
The system does not recognize the presence of the drive or
system error message, “No Drives Found,” appears.
•Check all cables.
•Check all cards.
•Check the BIOS memory address.
•Check the drive type. In AT systems, the drive type must be
set to zero. Check the partition with the FDISK utility. Make
sure that the partition you are trying to boot from is the active
partition.
•Check the drive and host adapter terminating resistors. See
“Configuring the drive” on page 3 and refer to your host
adapter documentation.
•Check the terminator power source jumper settings.
•Check the power supply specifications.
•Reboot and make sure the drive comes up to rotating speed.
(It may be difficultto hear the discs spin.) If thedrive does not
spin its discs, check all drive cables.
•If you tried to install more than two hard drives ortwo diskette
drives, you may have installed more drives than your host
adapter can support.Check yourhost adapter documentation
for details.
ST5660N Installation Guide, Rev A 15

System error message, “Drive not Ready,” appears.
•Checkallcables.Foreachribbon cable,verifythatpin1ofthe
cable is aligned with pin 1 of the connector. Pin 1 is usually
denoted by a stripe on the side of the ribbon cable.
•Check the power supply specifications.
•Turn off the system and wait 20 seconds. Turn it back on and
make sure the drive spins up. If the drive does not spin up,
check the drive power cable.
The screen stays blank when you power up the system.
•Make sure the monitor is plugged in and turned on.
•Check all cards. Make sure the video card is seated in its slot
and secured with mounting screws.
•Check all cables. Make sure the video card cables are se-
curely attached.
•Whilethe systemis turnedoff, remove the drivehost adapter.
If the screen turns on after you reboot, the host adapter may
be incompatible or defective. See your dealer.
The system hangs in FDISK or fails to create or save the
partition record.
•Check all cables.
•The DOS utilities diskette may be corrupted. Try your backup
DOS diskette.
•If you have DOS Version 4.0 or earlier, make the drive parti-
tions smaller.
•Check for media defects at the beginning of the drive. Use a
third-party surface scan utility.
16 ST5660N Installation Guide, Rev A

TheFDISKerrormessage,“NoFixedDiskPresent,”appears.
•Check all cables.
•Check the power supply specifications.
•Make sure the drive spins up when you turn on the system.
•Check the drive type. In AT systems, the drive type must be
set to zero.
•Check for I/O address conflicts.
During the DOS high-level format, the drive keeps retrying
hard errors and reporting the following message. “Attempt-
ing to recover allocation units. . .”
•This is normal with DOS Version 4.0 or later.
DOS messages, “Disk Boot Failure,” “Non-System Disk,” or
“No ROM Basic - SYSTEM HALTED,” appear.
•Open the floppy door.
•Check all cables.
•Use the same version of DOS throughout your system.
•Reinstall the DOS system files using the DOS SYS utility.
•Make sure the primary partition is active in FDISK.
•Check for viruses.
ST5660N Installation Guide, Rev A 17

Technical support services
Always consult your system dealer first for technical support.
Dealers are generally knowledgeable about unique system con-
figurations.
Technical support is availablefor all Seagate products by calling
the SeaFAX, Seagate Technical Support FAX, SeaFONE,
SeaBOARDand SeaTDDservices.
SeaFAX. 408/438-2620
You can use a touch-tone telephone to access Seagate’s
automated FAX system to receive technical support informa-
tion by return FAX. This service is available 24 hours daily.
Location Telephone number
United States 408-438-2620
England 44-62-847-7080
Seagate Technical Support FAX. [phone]
You can FAX questions or comments to technical support
specialists 24 hours daily. Responses are sent between
8:00A.M. and 5:00P.M. (Pacific time), Monday through Friday.
SeaFONE. 408/438-8222
You can talk to a technical support specialist between
8:00 A.M. and 5:00 P.M. (Pacific time), Monday through Friday.
SeaFONE provides recorded technical information on
selected Seagate products while you are on hold. You can
18 ST5660N Installation Guide, Rev A