Seagate ST9100A User manual

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ST9100A
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ST9100AG
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AT Interface Drive
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Installation Guide
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Contents
Read before you begin... . . . . . . . . . . . . . . 1
Installation overview . . . . . . . . . . . . . . . . . . . . 2
Setting master/slave jumpers . . . . . . . . . . . . . . . 3
Connecting cables . . . . . . . . . . . . . . . . . . . . . 3
Mounting the drive . . . . . . . . . . . . . . . . . . . . . 5
Configuring system BIOS . . . . . . . . . . . . . . . . . . 5
Formatting and partitioning the drive . . . . . . . . . . . 8
Installation trouble-shooting . . . . . . . . . . . . . . . . 9
Appendix A. AT interface connector pin assignments . 11
Appendix B. Mounting dimensions . . . . . . . . . . . 12
Appendix C. Technical support services . . . . . . . . 13
© 1993 Seagate Technology, Inc. All rights reserved
Publication Number: 36217-001, Rev. A
Seagate®
, Seagate Technology® , and the Seagate logo are reg-
istered trademarks of SeagateTechnology, Inc.SeaFAX, Sea-
FONE, SeaTDD, and SeaBOARDare trademarks of
Seagate Technology, Inc. Other product names are trademarks
or registered 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 of Seagate
Technology, Inc.

Read before you begin...
Note. ST9100A and ST9100AG are usually installed in note-
book or laptop systems. Special training or tools may be
needed to service these computers. In some instances,
opening the case may void your warranty. Be sure to
review the terms and conditions of your system warranty
before opening the system enclosure.
Warning. Toavoidpersonalinjuryanddamageto theelectronic
devices, always power off and unplug your computer
system before touching any internal components.
Observe static discharge precautions.
•Keep the drivein its static-shieldedbag until you are readyto
complete the installation.
•Do not touch the PC board or the I/O connector pins.
•Always handle the drive by its edges or frame. Never apply
pressure to the PC Board or to the drive top cover.
•Use a grounded wrist strap. If none is available, ground
yourself by touching the metal chassis of the system before
handling any components.
•Use antistatic padding on all work surfaces and avoid static-
inducing carpeted areas.
Check all items. Examine the drive, cables, mounting hardware
and accessories, documentation and packaging. If any item is
incorrect, missing or appears damaged, contact your distributor
or dealer immediately.
Handle drives carefully. Improper handling during transit or
shipping accounts for many installation problems. Even minor
bumpscanexertrelativelylargeGforcesonthesedrives. Always
ST9100A and ST9100AG Installation Guide, Rev. A 1

handle the drive carefully. In addition, do not attach any labels to
the drive top cover, as they may prevent proper ventilation.
Warranty. Contact your authorized Seagate distributor or dealer
for warranty information.
Maintenance and repair. Seagate drives do not require any
preventive maintenance. The head/disc assembly is sealed and
doesnotcontainanyuser-serviceablecomponents.Tamperingwith
the factory seal voids the warranty. Seagate customer-service
centers are the only facilities authorized to service Seagate drives.
Seagate does not sanction any third-party repair facilities.
Shipping. When transporting or shipping a drive,
you must use a
Seagate-approved container. If possible, use an original Seagate
shipping box with a
Seagate Approved Package label. Shipping a
drive ina nonapproved container voids the drive warranty.
Seagate service centers may refuse receipt of components
improperly packaged or obviously damaged in transit. Call your
authorized Seagate distributor to purchase additional boxes.
Seagaterecommendsshippingbyanair-ridecarrierexperienced
in handling computer equipment.
Installation overview
Drive installation can be divided into several logical steps:
1. Setting master/slave jumpers
2. Connecting cables
3. Mounting the drive in the system
4. Configuring system BIOS
5. Formatting and partitioning the drive
Each of these steps is described in detail on thefollowingpages.
Somemaynotbeapplicabletoyourparticularinstallationrequire-
ments.
2 ST9100A and ST9100AG Installation Guide, Rev. A

Setting master/slave jumpers
Two drives may be controlled through a single drive controller
cable with two connectors. In this case, one drive is designated
as the masterandthe otheris designatedas theslave. Asshown
in Figure 1 on page 4, the jumpers on each drive must be set to
identify which drive is master and which is slave.
Connecting cables
ST9100A and ST9100AG drives use a 44-pin AT interface con-
nector cable with two rows of 22 female contacts on 0.079-inch
(2 mm) centers (see Figure 1). Pin assignments for the AT
interface are listed in Appendix A.
Most cables have a stripe down one side, which designates pin
1. Make sure pin 1 on the interface cable connector is aligned to
pin 1 on the drive interface connector and pin 1 on the host
connector.Toassistincablealignment, pin20hasbeenremoved
on the male interface connector on the drive. This type of
connector is designed to be used with a keyed cable connector
having a plug in place of pin 20.
Before mounting the drive, be sure that the connecting cable is
long enough to reach the drive, but not so long that it will be
pinched when the system enclosure is replaced. Connecting
cables for the ST9100A and ST9100AG must be no longerthan
18 inches (457 mm).
Power connections
Power for the ST9100A and ST9100AG is supplied through the
44-pin interface connector (see Appendix A for specific pin as-
signments).
Caution. These drives can accept only +5 volts DC power. Do
not use +12 volts DC power.
ST9100A and ST9100AG Installation Guide, Rev. A 3

Master/slave
configuration jumpers
Pin 1
Pin 20 removed
for keying Circuit board
A C
B D
Drive is master, no slave drive present
Drive is master; Seagate slave drive present
Drive is slave; Seagate master drive present
Reserved position (Do not use)
Figure 1. AT interface cable connector and master/slave
configuration jumpers
4 ST9100A and ST9100AG Installation Guide, Rev. A

Mounting the drive
You may mount (and operate) the ST9100A and ST9100AG in
any orientation. However, you must securely attach the drive to
a rigid frame using four side-mounting screws or four bottom-
mounting screws.
Caution. To avoid damaging the drive:
•Use M3X0.5
metric mounting screws only .
•Do not insert mounting screws more than 0.150 inches
(3.81 mm) into the mounting holes.
•Do
not overtighten the screws (maximum torque: 3 inch-lb).
Allow a minimum clearance of 0.030 inches (0.762 mm) around
the entire perimeter of the drive for cooling airflow.
MountingdimensiondrawingsfortheST9100drivesareprovided
in Appendix B. Most ST9100Aand all ST9100AG drives conform
to the industry-standard MCC mounting specification. Refer to
the
ST9100AandST9100AGProductManual (SeagatePublica-
tion 36211-001) for details.
Configuring system BIOS
Before the host system can recognize a new drive, it must be
provided with basic information about the drive into the host
system BIOS. Specifically, you need to know the number of
cylinders, heads, and sectors, as well as the overall capacity of
the drive you are installing. The table on page 6 lists these
specifications for the ST9100A and ST9100AG. It is not neces-
sary to understand these terms to set up the system BIOS.
Read your system documentation or run your system setup
program (described on the following page) to determine which
drive types your BIOS supports. Another method is to run the
FINDTYPE.EXE utility program, available from Seagate Techni-
ST9100A and ST9100AG Installation Guide, Rev. A 5

cal Support services (on the SeaBOARD BBS) as described in
Appendix C.
The methods used to configure system BIOS vary from system
to system. In many cases,you can run a setupprogramfrom the
DOS prompt. In other cases, you must initiate BIOS setup by
pressingcertain keys while the system is booting up.
Within the setup program, there are threepossible ways that you
can specify your drive type:
•Match your drive specifications (from the table below) with
those of a drive type specified in the setup program.
•Specify a custom or user-defined drive type in the setup
program, then manually enter your drive specifications from
the table below.
•Selectspecifications lower than those required for your drive,
and allow your drive to mimic the drive type selected.
Drive Specification ST9100A and ST9100AG
No. cylinders 748
No. read/write heads 14
No. sectors per track 16
Total No. sectors 167,552
Capacity (Mbytes)
BIOS calculated 81.8
Usable 85.8
When the drive specifications are entered manually as a user-
defined or custom drive type, the BIOS should display a drive
capacityequaltothe
BIOScalculatedcapacity inthetableabove.
This value will be lower than the usable drive capacity.
6 ST9100A and ST9100AG Installation Guide, Rev. A

Ina fewsituations, none ofthedrivetypesspecified inyourBIOS
setup program will match your drive, and the setup program will
not provide an opportunity to specify a custom drive type. In this
case, consider the third option described on page 6 — allowing
yourST9100AorST9100AGdrive tomimiconeof theBIOS-sup-
ported drivetypes. During theBIOS setup process, simplyselect
adrivetypewitha capacitythatis
less than or equalto thedrive’s
BIOS calculated capacitylisted in the tableon page 6. This drive
type should have no more than 1,024 cylinders, 16 read/write
heads, or 63 sectors per track. In addition, the total number of
sectorsforthatdrivetype(listedin thesetupprogram)shouldnot
exceed the number of cylinders times the number of read/write
heads times the number of sectors per track. In other words:
Total sectors per drive
≤
(No. cylinders)
× (No. read/write heads) × (No. sectors/track)
BIOS compatibility recommendations
TheST9100AandST9100AGareATinterfacecompatibledrives,
whichconformtoATAspecifications.ThehostsystemBIOSmust
provide support for the AT interface command set. Consult the
system documentation for information on the AT interface within
your system. Several key compatibility issues are discussed
below.
In accordance with ATAspecifications, the BIOS must reset any
emulation/translation parameters after a hard reset is received
from the host.
In some configurations, the ST9100A and ST9100AG drives
supply 16 bytes of Error Correction Code (ECC) with the Read
Long and Write Long commands. Depending on the drive type,
your system BIOS may look for 4 bytes of ECC. If your system
BIOS expects 4 bytes of ECC and the drive supplies 16 bytes,
ST9100A and ST9100AG Installation Guide, Rev. A 7

some drive diagnostic programs may fail, typically resulting in
time-out errors. Consult your system documentation or call your
system dealer or manufacturer for information on configuring
your system to receive 4 bytes of ECC.
Formatting and partitioning the drive
Caution. Reformatting or repartitioning a drive that contains
data may result in a partial or complete loss of that
data. Make sure all data has been safely backed up
before repartitioning or reformatting a drive. Seagate
Technology assumes no liability for lost data.
Low-level formatting
SeagateATInterfacedrivesarelow-levelformattedatthefactory
and do not require additionallow-level formatting prior to use.
Partitioning
Asingle disc drive can be subdivided into partitions that behave
as separate drives (labeled C, D, E, etc.). Versionsof DOS prior
toVersion4.0 are not abletoaccessmorethan32Mbytes ofdisc
space as a single drive. Therefore, drives having a capacity of
over 32 Mbytes
must be divided into several smaller partitions
for use with these older versions of DOS. Seagate does not
recommend using the ST9100AorST9100AG with a DOS version
prior toVersion3.3.
To partition a drive, you must first boot the systemusing a floppy
disk that contains system files. Partition the drive using the DOS
FDISKutilityprogram (describedinyourDOSmanual).Ifyouare
partitioning a drive that will be used to boot the system, make
sure that the primary DOS partition is marked active.
High-level formatting
Once the drive is partitioned, use the DOS FORMAT command
(or equivalent utility program) to high-level format each of the
8 ST9100A and ST9100AG Installation Guide, Rev. A