. . . . . . . . . . . . . . . . . . . . . . . . . .
ST9235 Family:
. . . . . . . . . . . . . . . . . . . . . . . . . .
ST9080A
. . . . . . . . . . . . . . . . . . . . . . . . . .
ST9145A, ST9145AG
. . . . . . . . . . . . . . . . . . . . . . . . . .
ST9235A, ST9235AG
. . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Guide
. . . . . . . . . . . . . . . . . . . . . . . . . .
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 troubleshooting . . . . . . . . . . . . . . . . 9
Appendix A. AT interface connector pin assignments . 11
Appendix B. Mounting dimension drawings . . . . . . . 12
Appendix C. Technical support services . . . . . . . . 15
© 1993 Seagate Technology, Inc. All rights reserved
Publication Number: 36216-001, Rev. B
®
Seagate
istered trademarks of Seagate Technology, 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 Technology®, and the Seagate logo are reg-
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.
ST9235 Family Installation Guide, Rev. B 1
Read before you begin
Note. Drives in the ST9235 family 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. Always power off and unplug your computer system
before touching any internal components.
Observe static discharge precautions.
• Keep the drive in its static-shielded bag until you are ready to
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’s 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 staticinducing carpeted areas.
Inspection. When you are familiar with the handling precautions
listed above, inspect the drive. If it appears to be damaged,
contact your distributor or dealer immediately.
Handle drives carefully. Improper handling during transit or
shipping accounts for many installation problems. Even minor
bumps can exert relatively large G forces on these drives. Always
handle the drive carefully. In addition, do not attach any labels to
the drive top cover, as they may prevent proper ventilation.
...
2 ST9235 Family Installation Guide, Rev. B
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
does not contain any user-serviceable components. Tampering with
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,
Seagate-approved container. If possible, use an original Seagate
shipping box with a
Seagate Approved Package
you must use
label.
Shipping a
drive in a 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.
Seagate recommends shipping by an air-ride carrier experienced
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
4. Configuring the system BIOS
5. Formatting and partitioning the drive
Each of these steps is described in detail on the following pages.
Some may not be applicable to your particular installation requirements.
a
ST9235 Family Installation Guide, Rev. B 3
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 master and the other is designated as the slave. As shown
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
The ST9235 Family drives use a 44-pin AT interface connector
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. To assist in cable alignment, pin 20 has been removed
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 ST9235 family drives must not be longer than 18
inches (457 mm).
Power connections
Power for the ST9235 family drives is supplied through the 44-pin
interface connector (see Appendix A for specific pin assignments).
Caution. These drives can accept only +5 volts DC power. Do
not use +12 volts DC power.
Master/slave
configuration jumpers
Circuit board
Pin 1
Pin 20 removed for keying
Drive is master; no slave present
Drive is master; Seagate slave drive present
Drive is slave; Seagate master drive present
Reserved positions (do not use)
Note. Drive is shown with
circuit board up.
A C
B D
4 ST9235 Family Installation Guide, Rev. B
Figure 1. AT interface cable connector and master/slave
configuration jumpers
ST9235 Family Installation Guide, Rev. B 5
Mounting the drive
You can mount (and operate) a ST9235 family drive 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
• Do not insert mounting screws more than 0.150 inches
(3.81 mm) into the mounting holes (except: 0.190 inches
(4.82 mm) for the bottom-mounting holes of the ST9235A and
ST9235AG).
• Do
not
Allow a minimum clearance of 0.030 inches (0.762 mm) around
the entire perimeter of the drive for cooling airflow.
Mounting dimension drawings for the ST9235 family drives are
provided in Appendix B. As shown in these drawings, some
ST9235 family drives conform to the industry standard MCC
mounting specification. Refer to the
Manual
(Seagate publication 36206-001) for further details.
metric
mounting screws
overtighten the screws (maximum torque: 3 inch-lb).
only
.
ST9235 Family Product
Configuring system BIOS
Before the host system can recognize a new drive, you must
enter 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
ST9235 family drives. It is not necessary 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
6 ST9235 Family Installation Guide, Rev. B
drive types your BIOS supports. Another method is to run the
FINDTYPE.EXE utility program, available from Seagate Technical 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 setup program from the
DOS prompt. In other cases, you must initiate BIOS setup by
pressing certain keys while the system is booting up.
Within the setup program, there are three possible 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.
• Select specifications lower than those required for your drive,
and allow your drive to mimic the drive type selected.
Drive Specification ST9080A
No. cylinders 823 980 985
No. read/write heads 4 15 13
No. sectors per track 38 17 32
Total No. sectors 125,096 249,900 409,760
Capacity (Mbytes)
BIOS calculated 61.0 122.0 200.0
Usable 64.0 127.9 209.7
ST9145A &
ST9145AG
ST9235A &
ST9235AG
When the drive specifications are entered manually as a userdefined or custom drive type, the BIOS should display a drive
capacity equal to that listed as BIOS calculated capacity in the
ST9235 Family Installation Guide, Rev. B 7
table above. This value will be lower than the usable drive
capacity.
In a few situations, none of the drive types specified in your BIOS
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 above — allowing your
ST9235 family drive to mimic one of the BIOS-supported drive
types. During the BIOS setup process, simply select a drive type
with a capacity that is
calculated capacity listed in the table on page 6. This drive type
should have no more than 16 read/write heads or 63 sectors per
track. In addition, the total number of sectors for that drive type
(listed in the setup program) should not 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
) × (
less than or equal to
≤
No. read/write heads
the drive’s BIOS
) × (
No. sectors per track
BIOS compatibility recommendations
The ST9235 family drives are AT interface compatible drives,
which conform to ATA specifications. The host system BIOS must
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 ATA specifications, the BIOS must reset any
emulation/translation parameters after a hard reset is received
from the host.
In some configurations, the ST9235 family AT interface drives
supply 11 bytes of Error Correction Code (ECC) with the Read
Long and Write Long commands. Depending on the drive type,
)
8 ST9235 Family Installation Guide, Rev. B
your system BIOS may look for 4 bytes of ECC. If your system
BIOS expects 4 bytes of ECC and the drive supplies a different
number of bytes, 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 11 bytes of ECC.
Formatting and partitioning the drive
Caution. Formatting or partitioning 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
Seagate AT Interface drives are low-level formatted at the factory
and do not require additional low-level formatting prior to use.
Partitioning
A single disc drive can be subdivided into partitions that behave
as separate drives (labeled C, D, E, etc.). Versions of DOS prior
to Version 4.0 are not able to access more than 32 Mbytes of disc
space as a single drive. Therefore, drives having a capacity of
over 32 Mbytes
for use with these older versions of DOS. Seagate does not
recommend using ST9235 family drives with DOS versions prior to
Version 3.3.
To partition a drive, you must first boot the system using a floppy
disk that contains system files. Partition the drive using the DOS
FDISK utility program (described in your DOS manual). If you are
partitioning a drive that will be used to boot the system, make
sure that the primary DOS partition is marked active.
must
be divided into several smaller partitions
ST9235 Family Installation Guide, Rev. B 9
High-level formatting
Once the drive is partitioned, use the DOS FORMAT command
(or equivalent utility program) to high-level format each of the
drive partitions. This process verifies the information written by
the low-level format and creates file allocation tables (used to
catalog and access files). Consult your DOS manual for FORMAT
command options. During formatting, DOS system files should
be transferred to one disc partition (generally the “C” drive), so
that the system can boot off of that drive. After high-level formatting a drive, you can verify the usable drive capacity using the
DOS CHKDSK utility program.
Installation troubleshooting
Before calling Seagate Technical Support, please read and consider all the possibilities discussed below. The suggestions presented here will resolve the vast majority of installation problems.
Warning. To avoid personal injury and damage to electronic
components, always turn off and unplug the computer
system before changing jumpers or touching any
internal components.
• Verify compatibility. Check the documentation for the host
adapter and the drive to confirm that these components are
appropriately matched for each other and to your system.
• Verify your configuration. Refer to the drive and controller
installation guides to make sure all jumper settings suit your
configuration requirements.
• Check all cables. Make sure all cables are securely con-
nected. Ribbon cables are especially fragile. Make sure they
are not crimped or damaged in any way. Having extra cables
on hand for troubleshooting saves time and frustration. Most
cables have a stripe down one side to designate the pin 1
10 ST9235 Family Installation Guide, Rev. B
location. Make sure pin 1 on the interface cable connector is
connected to pin 1 on the drive interface connector and pin 1
on the host connector. Refer to Figure 1 on page 4 for the
location of pin 1 on the drive interface connector.
• Check all cards. Make sure all cards are secured in the
expansion slots on the motherboard. Full size (16-bit) cards
cannot be plugged into half-size (8-bit) slots. Make sure all
cards are plugged into appropriately sized expansion slots.
Once the cards are permanently installed and the system is
running properly, use mounting screws to secure the cards in
place.
• Check the power supply specifications. The output of your
power supply may not be sufficient to meet the power requirements of the new devices you have installed. If you are not
sure whether the power supply meets the system requirements, consult your system dealer or distributor.
• Use the same version of DOS throughout your system.
The same version of DOS must be used throughout all phases
of building and configuring your system.
• Verify the BIOS drive type. The BIOS drive type you speci-
fied during system setup must approximate, but not exceed,
the specifications and maximum drive capacity of the disc
drive. Refer to the BIOS configuration section of this manual
to double check your drive specifications against those specified in your system BIOS.
• Check for viruses.
the installation diskettes for viruses. After the software has
been installed on the hard disc, scan that drive for viruses.
Symptoms of viruses can include intermittent system lockups, reboots and drive errors.
Before installing any new software, scan
Drive 0
(master)
Drive 1
(slave)
28
34
39
28
34
39
SPSYNC:CSEL
PDIAG
–
DASP–
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Host Reset
Ground
Host Data Bus Bit 7
Host Data Bus Bit 8
Host Data Bus Bit 6
Host Data Bus Bit 9
Host Data Bus Bit 5
Host Data Bus Bit 10
Host Data Bus Bit 4
Host Data Bus Bit 11
Host Data Bus Bit 3
Host Data Bus Bit 12
Host Data Bus Bit 2
Host Data Bus Bit 13
Host Data Bus Bit 1
Host Data Bus Bit 14
Host Data Bus Bit 0
Host Data Bus Bit 15
Ground
(No Pin)
DMA Request
Ground
Host I/O Write
Ground
Host I/O Read
Ground
I/O Channel Ready
Spindle sync
or Cable Select
DMA Acknowledge
Ground
Host Interrupt Request
Host 16 Bit I/O
Host Address Bus Bit 1
Passed Diagnostics
Host Address Bus Bit 0
Host Address Bus Bit 2
Host Chip Select 0
Host Chip Select 1
Drive Active/
Drive 1 Present
Ground
Host pin # and signal description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
*28
29
30
31
32
33
*34
35
36
37
38
*39
40
Drive pin #
Signal name
ST9235 Family Installation Guide, Rev. B 11
Appendix A.
AT interface connector pin assignments
–
Reset
Ground
DD7
DD8
DD6
DD9
DD5
DD10
DD4
DD11
DD3
DD12
DD2
DD13
DD1
DD14
DD0
DD15
Ground
(removed)
DMARQ
Ground
–
DIOW
Ground
–
DIOR
Ground
IORDY
SPSYNC:CSEL
–
DMACK
Ground
INTRQ
–
IOCS16
DA1
–
*Indicates master-slave signals (details shown below).
PDIAG
DA0
DA2
CS1FX
CS3FX
DASP
Ground
–
–
–
Host
28
34
39
4X 3 mm × 0.5 mm
0.15 in (3.81 mm)
min. full thread
1.375 ± 0.015
(34.93 ± 0.38)
0.066 ± 0.020
(1.68 ± 0.51)
0.100 ± 0.010
(2.54 ± 0.25)
4.010 (101.85) max
1.500 ± 0.010
(38.10 ± 0.25)
0.000
1.227 ± 0.025
(31.17 ± 0.64)
0.155 ± 0.025
(3.94 ± 0.64)
0.275 ± 0.025
(6.99 ± 0.64)
0.000
0.000
2.760 (70.10) max
2.430 ± 0.020
(61.72 ± 0.51)
4X 3 mm × 0.5 mm
0.15 in (3.81 mm)
min. full thread
0.166 ± 0.015
(4.22 ± 0.38)
Pin 1
0.079 (2.00)
Pin 20 removed
for keying
0.146 +0.011, –0.008
(3.71 +0.28, –0.20)
0.079 (2.00)
1.654 (42.00)
0.492 ± 0.005
(12.50 ± 0.13)
Dimensions are in inches (mm)
12 ST9235 Family Installation Guide, Rev. B
Appendix B.
Mounting dimension drawings
Figure 2. Mounting dimensions for the ST9080A
0.157 ± 0.020
(3.99 ± 0.51)
0.146 +0.011, –0.008
(3.71 +0.28, –0.20)
4X 3 mm × 0.5 mm,
0.15 in (3.81 mm)
min full thread
0.000
2.590 (65.79)
0.000
4.010 max (101.85)
2.875 (73.03)
4X 3 mm × 0.5 mm,
0.15 in (3.81 mm)
min full thread
0.079 (2.00)
pin spacing
Pin 1
0.000
0.118 (3.00)
1.375 (34.93)
0.394 ± 0.025
(10.01 ± 0.64)
1.375 (34.93)2.875 (73.03)
0.750 max (19.05)
1.227 ± 0.025
(31.17 ± 0.64)
0.160 (4.06)
2.760 max (70.10)
Pin 20 removed
for keying
0.079 (2.00) pin spacing
Notes:
1. The ST9145A form-factor complies with MCC mounting standards.
2. All dimensional tolerances are ± 0.010 inch (± 0.25 mm) maximum
unless otherwise specified.
Dimensions are in inches (mm)
ST9235 Family Installation Guide, Rev. B 13
Figure 3. Mounting dimensions for the ST9145A and
the ST9145AG
Key to mounting specifications:
non-MCC mount
MCC mount
0.750 (19.05) max
4X 3 mm × 0.5 mm
0.15 in. (3.81 mm)
min. full thread
1.375 ± 0.015
(34.93 ± 0.38)
0.066 ± 0.020
(1.68 ± 0.51)
0.039 ± 0.020
(0.99 ± 0.51)
0.230 ± 0.010
(5.84 ± 0.25)
0.118 ± 0.010
(3.00 ± 0.25)
4.010 (101.85) max
1.500 ± 0.010
(38.10 ± 0.25)
0.000
1.227 ± 0.025
(31.17 ± 0.64)
0.155 ± 0.025
(3.94 ± 0.64)
0.275 ± 0.025
(6.99 ± 0.64)
0.239 ± 0.025
(6.07 ± 0.64)
0.000
0.000
2.760 (70.10) max
2.430 ± 0.020
(61.72 ± 0.51)
4X 3 mm × 0.5 mm
0.15 in (3.81 mm)
min. full thread
0.166 ± 0.015
(4.22 ± 0.38)
0.157 ± 0.009
(3.99 ± 0.23)
Pin 1
0.079 (2.00)
Pin 20 removed
for keying
0.146 +0.011, –0.008
(3.71 +0.28, –0.20)
0.079 (2.00)
1.654 (42.00)
Dimensions are in inches (mm)
14 ST9235 Family Installation Guide, Rev. B
Figure 4. Mounting dimensions for the ST9235A and
the ST9235AG
ST9235 Family Installation Guide, Rev. B 15
Appendix C.
Technical support services
Product technical support is available for all Seagate products by
calling the SeaFAX, SeaFONE, SeaTDD and SeaBOARD services described below. These services are free, but long-distance
charges (if any) are paid by the user.
SeaFAX. 408/438-2620
You can use a touch-tone telephone to access Seagate’s
automated FAX system and select technical support information by return FAX. This service is available 24 hours a day,
7 days a week.
SeaFONE. 408/438-8222
Seagate’s phone system provides recorded technical information on selected Seagate products while you are on hold.
Technical support specialists are available to answer questions from 8:00
Recordings are accessible 24 hours a day, 7 days a week.
SeaTDD. 408/438-5382
Using a TDD (Telecommunications Device for the Deaf) device, you can send questions or comments 24 hours a day, or
communicate with a technical support specialist between 8:00
A.M. and 5:00 P.M. (PST), Monday through Friday.
SeaBOARD.
The Seagate Technical Support Bulletin Board System (BBS)
is available 24 hours a day, 7 days a week. A modem is
required to access this service. Set your communications
software for eight data bits, no parity and one stop bit (8N1).
Using the SeaBOARD BBS you can obtain:
• Specifications and configuration for Seagate products.
• Reprints of Seagate documentation.
A.M. to 5:00 P.M. (PST), Monday through Friday.
16 ST9235 Family Installation Guide, Rev. B
• A directory of information and helpful utility programs that
you can download to your own computer.
• The FINDTYPE.EXE utility program, which can be very
useful in drive installation. It compares the drive’s geometry
with all geometries supported by your system BIOS. This
program either signals that an exact match exists between
the drive geometry and the system BIOS, or recommends
the closest drive type supported by your system BIOS.
BBS location Modem number
United States 408-438-8771 9600
England 44-62-847-8011 9600
France 33-1-40 67 10 34 9600
Germany 49-89-140-9331 2400
Singapore 65-292-6973 9600
Australia 61-2-756-2359 9600
Maximum
baud rate
Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, CA 95066, USA
Publication Number: 36216-001, Rev. B, Printed in USA
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