Seagate ST1102A User manual

<SP Seagate
Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, California 95066-4544, US/
Publication Number: 36154-001, Rev. B
ST1102A, ST 1 1 4 4A
AT Interface Drive
Installation Guide
&P Seagate

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Copyright Notice
Seagate®, Seagate Technology® and the Seagate logo are re : Istpred
trademarks of Seagate Technology, Inc.
©Copyright 1990 Seagate Technology, Inc.
920 Disc Drive, Scotts Valley, California 95066-4544, USA
Telephone: [phone]
Publication Number: 36154-001, Rev. B
Seagate reserves the right to change, without notice, product offerings 1 '
or specifications. This publication, and all material contained herein, are
copyrighted with all rights reserved. No part of this publication may be
copied without written permission of Seagate Technology, Inc.
AMI is a registered trademark of American Megatrend, Inc. Award is a
registered trademark of Award Corporation. AT is a registered trademark /
of International Business Corporation. XT is a trademark of International
Business Machines Corporation. Phoenix is a registered trademark of
Phoenix Corporation. Quadtel is a registered trademark of Quadtel
Corporation.
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ST 1102A/ST1144A AT Drive Installation Guide, Rev. B
Before You Begin...
This installation guide supports Seagate’s ST1102A and ST1144A
Drives, ROM 5.0, RAM 5.5 or greater.
Always verify that the system power is off before attempting any
installation
Inspect the drive, cables, mounting hardware/accessories, documenta¬
tion and packaging. If any item is incorrect, missing or appears damaged,
contact your Distributor or Dealer immediately.
Important Handling Notes: Improper handling during transit/shipping
accounts for many "installation" problems. Do not attach any labels to
the drive top cover as they may obstruct the breather holes. Always
handle the drive carefully.
Observe Static-Discharge Precautions: Keep the drive in the static-
shielded bag until you are ready to complete the installation. Use a
grounded wrist-strap at your workstation; if unavailable, ground yourself
frequently by touching the metal chassis of the system before handling
any components. Avoid static-inducing carpeted areas.
Shipping: When transporting or shipping a drive or controller, a
Seagate-approved container must be used.
Keep your original box. They are easily identified by the Seagate
Approved Package label. Shipping a drive in a non-approved con¬
tainer will void the drive warranty.
Seagate service centers may refuse receipt of components improperly
packaged or obviously damaged in transit. Contact your Authorized
Seagate Distributor to purchase additional boxes. Seagate recommends
shipping by an air-ride carrier experienced in handling computer equip¬
ment.
Maintenance: Seagate disc drives do not require any preventive main¬
tenance. The head/disc assembly is sealed and does not contain any
user-serviceable components. Tampering with the factory-seal will void
the warranty.

2_
ST 1102A/ST1144 A AT Drive Installation Guide, Rev. B
ST 1102A/ST1144A AT Drive Installation Guide, Rev. B
_3
Seagate customer service centers are the only facilities authorized to
service Seagate drives. Seagate does not sanction any third-party repair
facilities. Any unauthorized repair or tampering with the factory-seal will
void the warranty.
Warranty: Contact your Seagate Authorized Distributor or your Dealer
for warranty information.
End-User Technical Support: Seagate maintains a 24-hour bulletin
board service. This facility offers up-to-date product technical support.
Modem Number: 408/438-8771 [300-9600 HST, MNP 3/5, N-8-1]
This is atoll call.
FCC Verification
This equipment has been tested with a Class B computing device and
has been found to comply with Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference
in residential installations. This equipment generates, uses and can
radiate radio frequency energy, and if not used in accordance with the
instructions, may cause harmful interference to radio communications.
If this equipment does cause interference to radio or television equipment
reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more
of the following measures:
• Reorient or relocate the receiving antenna.
• Move the equipment away from the receiver.
• Plug the equipment into an outlet on a circuit different from that to
which the receiver is powered.
If necessary, the user should consult the dealer or an experienced
radio/television technician for additional suggestions.
Caution: Any changes or modifications to the equipment by the user not
expressly approved by the grantee or manufacturer could void the user’s
authority to operate such equipment.
Note: This digital apparatus does not exceed the Class B limits for radio
noise emissions from digital apparatus as set out in the Radio Inter¬
ference regulations of the Canadian Department of Communications.

ST1102A/ST1144A AT Drive Installation Guide, Rev. B
ST 1102A/ST1144A AT Drive Installation Guide, Rev. B
_5
1.0 Drive Capacity and Geometry
1.1 ST1102A Formatted Capacity
The following specifications are maximum logical numbers. Available
capacity depends on the drive type geometry supported by your system
BIOS.
Guaranteed Megabytes: 89.1
Guaranteed Sectors: 174,080
Sectors per Cylinder:
255
Bytes per Sector: 512
Bytes per Track:
8,704
Bytes per Cylinder:
130,560
1.1.1 ST1102A Translation (Default) Drive Organization
Maximum logical drive geometry numbers are listed below. These num¬
bers can vary for drive type, as long as they do not exceed the maximums
specified and the following product:
(Sectors/Track) (Cylinders) (Read/Write Heads) is less than or equal
to the maximum guaranteed sectors.
Default
Sectors per Track: 17 max
Cylinders:
1,024 max
Read/Write Heads: 10 max
1.2 ST1144A Formatted Capacity
The following specifications are maximum logical numbers. Available
capacity depends on the drive type geometry supported by your system
BIOS.
Guaranteed Megabytes: 130.7
Guaranteed Sectors: 255,255
Sectors per Cylinder: 255
Bytes per Sector: 512
Bytes per Track: 8,704
Bytes per Cylinder: 130,560
1.2.1 ST1144A Translation (Logical) Drive Organization
Maximum logical drive geometry numbers are listed below. These num¬
bers can vary for drive type, as long as they do not exceed the maximums
specified and the following product:
(Sectors/Track) (Cylinders) (Read/Write Heads) is less than or equal
to the maximum guaranteed sectors.
Default Other
Sectors per Track: 17 max 17 max
Cylinders: 1,001 max 1,024 max
Read/Write Heads: 15 14

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ST1102A/ST1144A AT Drive Installation Guide, Rev. 8
ST1102A/ST1144A AT Drive Installation Guide, Rev. B
7
2.0 Drive Setup and Installation
Important Note: All ST412 interface drive and controllers must be
removed from the system.
2.1 M aster/Slave Selection
A master/slave relationship must be established between drives on the
AT bus.
Drive 1 is configured as the master and drive 2 is designated as the slave.
The Master jumper (pins 3-4) and Slave Present jumper (pins 5-6) are
noted in Figure 1 on page 8.
Master Jumper
Slave Present
Jumper
Single Drive System
Install Jumper Remove Jumper
Drive 1 in a 2-Drive System
Install Jumper
Install Jumper
Drive 2 in a 2-Drive System
Remove Jumper Remove Jumper
2.2 R emote LED
When pins 9-10 at the User Configuration Jumper are shorted, the drive
will indicate activity to the host via the AT interface.
2.3 D rive Mounting and Cabling
The drive may be mounted horizontally with the PC board down or on
either side-edge. Mounting vertically, front panel up or down is prohibited.
Required for mounting: 4, 6-32 UNC-2B X 0.150 screws.
2.4 A T Host Adapter Support
Seagate offers two AT Host Adapters. They are both half-slot boards,
which provide a 40-pin AT interface connector for systems lacking an AT
interface drive connector on the system motherboard.
The ST07A/ST08A support two AT interface drives. They provide ad¬
dress decoding for hard drive I/O and buffering of signals between the
host and the hard drive.
The ST08A supports up to two floppy diskette drives:
• 5.25-inch, 360 Kbyte/1.2 Mbyte
• 3.5-inch, 720 Kbyte/1.44 Mbyte
An auxiliary DC power connector is provided on both boards.
Maximum cable length: 18-inches

ST 1102A/ST1144A AT Drive Installation Guide, Rev. B
Figure 1: ST1102A / ST1144A AT Interface Drive
Important Note: The Life test jumper is used during the manufacturing
process and is not recommended for field use.
ST 1102A/ST1144A AT Drive Installation Guide, Rev. B
3.0 Drive Partitioning and Formatting
• Required: DOS 3.3 or greater
• The ST 1102A and ST 1144A are low-level formatted at the factory.
Do not low-level format. Doing so will delete important factory-
written defect information.
• Run FDISK for drive partitioning and then high-level format with the
DOS FORMAT command.
• Be sure to transfer the DOS systems files, if a bootable drive is
required. Consult your system DOS manual for running FDISK and
FORMAT.
3.1 Supported System BIOS and Drive Types
The ST1102A and ST1144A are AT Interface compatible drives. The
following BIOS manufacturers have indicated that the listed BIOS
revision levels are fully AT Interface compatible.
Earlier BIOS revisions may provide partial AT Interface support. If
compatibility problems occur, please contact your system manufacturer
Refer to table on page 10.

10
ST 1102A/ST1144A AT Drive Installation Guide, Rev. B
ST1102A/ST1144A AT Drive Installation Guide, Rev. B
BIOS Mfg.
Version
ST1102A ST1144A
AMI
4/9/90 or later
35*
9, 47*, 45*
Award
3.04 or higher 33*
9, 41*
Quadtel
Single Drive: Any Version
Dual Drive: 3.04 or higher
40* 9
Phoenix
ROM BIOS Plus 286 3.10
or higher
ROM BIOS Plus 386 1.10
or higher
35*
9, 41*
PhoenixBIOS
1.00 or higher
35*
9,41*
* Implementation of these drive types may vary by system manufac¬
turer.
ECC Bytes: The ST1102A and ST1144A use 4 bytes of ECC with
Read/Write Long Commands. Based on drive type, some BIOS look for
7 bytes of ECC. If the BIOS expects 7 bytes, some drive diagnostics will
return false failures (typically timeout errors).
3.1.1 Drive Type Geometry
Drive types are selected and entered in the system CMOS during setup.
Match your drive type to one tabulated below:
Drive Type
Cylinders R/W
Heads
1
Sectors/Track
Formatted
MBytes
33 1,024
10 17
89.1
35 1,024
9 17
80.2
40 1,024
9
17
80.2
9
900 15 17
117.5
41
917
15 17
119.7
47
1,024 14
17
124.7
45 917
15 17
119.7
If you have a system BIOS which offers a "user-defined" drive type, select
from the following drive configurations:
Drive
Cylinders R/W
Heads
Sectors/Track
Formatted
MBytes
ST1102A
1,024
10 17
89.1
ST1144A 1,024
14 17
124.7
ST1144A
1,001 15 17
130.7
Note: Formatted megabytes are calculated using one megabyte equals
10 6 bytes.