Seagate ST9655 Family User manual

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ST9655 Family
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ST9655AG, ST9550AG
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ST9385AG
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AT Interface Drives
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Installation Guide
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© 1994 Seagate Technology, Inc. All rights reserved
Publication Number: 36286-001, Rev. A
October 1994
Seagate, Seagate Technology and the Seagate logo are regis-
tered trademarks of Seagate Technology, Inc. SeaFAX, Sea-
FONE, SeaBOARD and SeaTDD are trademarks of Seagate
Technology, Inc.Otherproduct namesareregisteredtrademarks
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 . . . . . . . . . . . . . . . . . . . . . . . 2
Mounting the drive . . . . . . . . . . . . . . . . . . . . . 4
Configuring your computer . . . . . . . . . . . . . . . . . 6
Formatting and partitioning the drive . . . . . . . . . . . 9
Installation troubleshooting . . . . . . . . . . . . . . . 10
Compatibility notes . . . . . . . . . . . . . . . . . . . . 17
Technical support services . . . . . . . . . . . . . . . . 18
Storing and shipping your drive . . . . . . . . . . . . . 20

Read before you begin ...
Application. Your drive is designed for IBM AT and compatible
personal computers, particularly laptop and notebook models.
Warning. Turn off the computer (and, if you have a notebook
or laptop computer, remove the battery) before you
open the case or touch any internal components.
Caution. Special training or tools may be needed to service
laptop and notebook computers. Opening the case
may void your warranty. Review the terms and condi-
tions of your warranty before opening the case.
Static discharge. Observe the following precautions:
•Beforehandlinganycomponents,putonagroundedwriststrap.
•Use antistatic padding on all work surfaces.
•Avoid static-inducing carpeted areas.
•Keep the drivein its static-shieldedbag until you are ready to
completetheinstallation.Donotattachanycablestothedrive
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.
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 drives do not require main-
tenance.Thehead/discassemblyissealed;ifyoubreaktheseal,
ST9655 Family Installation Guide, Rev. A 1

you voidthe warranty. Seagate customer servicecenters are the
only facilities authorized to repair Seagate drives. Seagate does
not sanction any third-party repair facilities.
Configuring the drive
1. Put on a grounded wrist strap. Wear the grounded wrist
strap throughout the installation procedure.
2. Install master/slave jumpers. In a two-drive system, you
need to designate one drive as the master, or drive 0, and
the other drive as the slave, or drive 1. To do this, install the
master/slave jumpers as shown in Figure 1. In a one-drive
system, configure the drive as a master (no jumpers in-
stalled).
Alternatively, you can configure the drive as a master or
slave using the cable select option. To use this option, the
host system and both drives must support cable select.
Cable selection requires a special daisy-chain cable that
grounds pin 28 (CSEL) on one of its two drive connectors.
If you attach the drive to the grounded CSEL connector, it
becomes a master. If you attach the drive to the un-
grounded CSEL connector, it becomes a slave.
To configure an ST9655 family drive for cable select, install
both master/slave jumpers, as shown in Figure 1.
Attaching cables
This drive is designed for a host computer that supplies
interface signals and +5V power through a single 44-pin
connector and cable. If your computer has a fixed connector
that attaches directly to the drive, skip ahead to the following
section, “Mounting the drive.” Otherwise, perform the steps
listed on page 4.
2 ST9655 Family Installation Guide, Rev. A

Master/slave
configuration jumpers
Circuit board
Pin 1
Pin 20 removed for keying
Note. Drive is shown with
circuit board up.
B D
A C
Drive is master; slave may be detected using DASP– signal
Drive is master; Seagate slave drive present
Drive is slave; Seagate master drive present
Use CSEL pin grounding to differentiate master from slave
Figure 1. ATA interface connector and master/slave
configuration jumpers
ST9655 Family Installation Guide, Rev. A 3

1. Turn off the computer and remove the battery.
2. Put on a grounded wrist strap.
3. Open your computer case. See your system manual for
instructions.
Caution. Openingthecase may voidyourcomputer’swarranty.
4. Connect the 44-pin interface/power cable. Match pin 1 of
the cableto pin 1 of the interface connectors on the drive and
on the computer. Pin 1 is usually denoted by a stripe along
one edge of the cable. The location of pin 1 on the drive
interface connector is shownin Figure 1 on page3. The cable
should be no longer than 18 inches (0.457 meters).
Caution. The printed circuit cables used in some laptop com-
puters are delicate. Be careful not to tear them.
Mounting the drive
Mount the drive securely in the computer using M3X0.5 metric
screws in thefour bottom mounting holes or thefour sidemounting
holesshowninFigure2.Youcanmountthedriveinanyorientation.
Be careful not to strain or crimp the interface/power cable.
Caution. To prevent damage to the drive:
•Be careful not to bend the drive connector pins, especially
when plugging the drive into a fixed connector.
•Use mounting screws of the correct size and length.
•Gently tighten the mounting screws—do not applymore than
3 inch-pounds of torque.
•Do not insert mounting screws more than 0.15 inch.
Note. This drive meets industry-standard MCC mounting speci-
fications. When installing this drive in a fixed-mounting
4 ST9655 Family Installation Guide, Rev. A

0.747 ± 0.007 (18.97 ± 0.18)
4X 3 mm × 0.5 mm
× 0.15 in. (3.81 mm) deep
min. full thread
(2 each side)
1.375 ± 0.015
(34.93 ± 0.38)
0.118 ± 0.010
(3.00 ± 0.25)
4.020 (102.11) max
(head/disc assembly
to tip of pins)
1.500 ± 0.010
(38.10 ± 0.25) 0.000
1.227 ± 0.020
(31.17 ± 0.51)
0.155 ± 0.020
(3.94 ± 0.51)
0.239 ± 0.035
(6.07 ± 0.89)
0.000
0.000
2.760 (70.10) max
2.430 ± 0.010
(61.72 ± 0.25)
0.157 ± 0.015
(3.99 ± 0.38)
Pin 1
0.079 (2.00)
Pin 20 removed
for keying
0.152 ± 0.005
(3.86 ± 0.13)
0.079 (2.00)
1.659 (42.14)
Dimensions are in inches (mm)
4X 3 mm × 0.5 mm
× 0.15 in. (3.81 mm) deep
min. full thread
4.010 (101.85) max.
(head/disc assembly)
Figure 2. Mounting dimensions for the ST9655 family drives
ST9655 Family Installation Guide, Rev. A 5

application, you must use MCC-compatible connectors
and mounting hardware. If the mounting holes in your
computer do not line up with the mounting holes on the
drive, your computer may not be MCC-compatible.
Configuring your computer
Before your computer can recognizeanew drive,you must enter
basic information about the drive into the computer’s long-term
memory (usually a battery-powered CMOS chip). The com-
puter’s basic input/output system (BIOS) uses this information to
control the flow of data to and from the drive.
Note. Some newer computers can automatically determine your
drivetypeandconfigurethemselvesappropriatelyatstartup.
Readyoursystemmanualtodeterminewhetherthisapplies
to your computer. If so, then skip ahead to “Formatting and
partitioning the drive,” on page 9.
If your computer cannot automaticallydetermineyour drivetype,
you must run a system setup program to specify the number of
cylinders, heads and sectors for each drive in your system. This
procedure is described on the following page. The table below
lists cylinder, head and sector information for the ST9655family
drives.
Drive specification ST9655AG ST9550AG ST9385AG
No. cylinders 1,016 942 934
No. read/write heads 16 16 14
No. sectors per track 63 59 51
Total no. sectors 1,024,128 889,248 666,876
Bytes per sector 512 512 512
Capacity (Mbytes)
BIOS calculated 499 434 325
Usable 524 455 341
6 ST9655 Family Installation Guide, Rev. A

To enter these drive specifications into your system BIOS, follow
these steps:
1. Turn on your computer.
2. Run the system setup program. This program configures
the system BIOS to recognizeyour drive. In some computers
you run the system setup program by pressing special keys
while the computer is booting up. In other computers, youcan
run the program from the DOS prompt. See your system
manual for more information.
3. Enter your drive specifications. Within the system setup
program, there are three possible ways that you can enter
your drive’s specifications. These are listed below in order of
increasing complexity.
•Select a predefined drive type. Most system setup pro-
grams provide a long list of predefined drive types. Select a
drive type with specifications that match those of your drive
(refer to the table onpage 6).
•Specify a
custom or user-defined drive type. If the
system setup program doesn’t list a predefined drive type
that matches your drive specifications, you may be ableto
define a custom or user-defined drive type. You can then
enter your drive specifications (from the table on page 6).
When you enter drive specifications for a custom or user-
defined drive type, the setup program should display a
drive capacity less than or equal to the
BIOS calculated
capacity
in the table on page6. This value is slightly lower
than the usable drive capacity.
•Allow your drive to emulate or
translate one of the
predefined drive types. If none of the predefined drive
types exactly matches your drive, and your system setup
ST9655 Family Installation Guide, Rev. A 7

program doesnot allowyouto specify a custom drive type,
your drive may be able to emulate any of the predefined
drivetypes. Select a predefined drive type that hasa BIOS
calculated capacity less than or equal to that of your drive
(as shown in the table on page 6).
Note. If you emulate a drive type with a lower storage capacity
than your drive, you limit the effective capacity of your
drive. For example, a 350-Mbyte drive emulating a
300-Mbyte drive will be limited to 300 Mbytes of storage
capacity.
If you are not sure which drive type to select, try running the
FINDTYPE.EXE utility program. This program is available
from Seagate’s Technical Support services (on the Sea-
BOARD computer bulletin board). FindType compares your
drive’s geometry with all geometries supported by your com-
puter’sBIOS.FindTypecanalsodeterminewhetheranexact
match exists between the drive geometry and the system
BIOS.Ifthereisnomatch,FindType selectstheclosestdrive
type supported by yourcomputer’sBIOS.
Thesystemsetupprogrammayrequestinformationonthe
drive’s write precomp or landing zone. Your Seagate drive
does not use theseparameters.Foreach parameter, enter
the number of cylinders plus 1 (for example, enter 935 for
the ST9385AG).
Caution. Write down the drive type that you have selected and
any drive specifications that you have entered. Keep
this information in a safe place. You will have to
re-enter this data if your CMOS battery fails.
8 ST9655 Family Installation Guide, Rev. A