Hard Drive: SEAGATE: ST9420A 420MB 2.5"/SSL ATA2 FAST
S T 9 4 2 0 A SEAGATE
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 2.5"/SUPERSLIMLINE Cylinders | 988| |
Capacity form/unform 420/ MB Heads 4| 16| |
Seek time / track 16.0/ 6.0 ms Sector/track | 52| |
Controller IDE / ATA2 FAST/ENHA Precompensation
Cache/Buffer KB Landing Zone
Data transfer rate 5.000 MB/S int Bytes/Sector 512
16.600 MB/S ext
Recording method PRML operating | non-operating
-------------+--------------
Supply voltage 5 V Temperature *C 5 55 | -40 70
Power: sleep 0.2 W Humidity % |
standby 0.3 W Altitude km |
idle 0.9 W Shock g 10 | 300
seek 1.9 W Rotation RPM 4500
read/write 2.0 W Acoustic dBA 24
spin-up W ECC Bit
MTBF h 300000
Warranty Month 36
Lift/Lock/Park YES Certificates
Layout
SEAGATE ST9420AG MARATHON 420SL JUMPER SETTING
+---------------------------------------------------------+ | |XX | |XXI | |XXN | |XXT | |XXE | |XXR | |XXF | |XXA | |XXC | |XXE | |XX | |XX | |XX | | 1 | |XXJumper +---------------------------------------------------------+
Jumpers
SEAGATE ST9420AG MARATHON 420SL JUMPER SETTINGS
Jumper Setting
==============
+--+ +Jumper--------Interface-----------------------------+ +--+
| +--+Bo oD o o o o o o o o o o o o o o o o o o o o o +--+ |
| | |Ao oC 1 o o o o o o o o o o o o o o o o o o o o o | | |
| | +--+-------------------------------------------------+ | |
| +-----+----------------------------------------------------+ |
+--------+-------------------------------------------------------+
|
o o Drive is master; slave may be detected using DASP-
o o signal
o X Drive is master; Seagate slave drive present
o X
X o Drive is slave; Seagate master drive present
X o
X X Use CSEL pin grounding to differate master from slave
X X
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. In a one-
drive system, configure the drive as a master (no jumpers installed).
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
ungrounded CSEL connector, it becomes a slave.
To configure an ST9420 drive for cable select, install both master/
slave jumpers.
Master/slave configuration
--------------------------
You must establish a master/slave relationship between two drives
attached to a single AT bus. You can configure a drive to become a
master or slave by setting the master/slave jumpers.
Alternatively, you can configure the drive as a master or slave using
the cable select option. This requires a specialized 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 ungrounded CSEL connector, it
becomes a slave. To use this option, the host system and both drives
must support cable select and both drives must be configured for
cable select. To configure a Marathon 420sl for cable select, install
both master/slave jumpers.
For the host to recognize the slave drive using the DASP- signal, the
slave drive must assert the DASP- signal at power up, and the master
drive must monitor DASP- at power up.
Remote LED configuration
------------------------
The drive indicates activity to the host through the DASP- line (pin
39) on the ATA interface. This line may be connected to a drive
status indicator driving an LED at 5V. The line has a 30 mA nominal
current limit. To avoid potential damage to the drive, the host
should include a resistor in the line to the LED. This resistor
should have a minimum resistance of 470 ohms (1,000 to 3,000 ohms
recommended).
Install
SEAGATE ST9420AG INSTALLATION GUIDE
Notes on installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
| | | | | |
+---------------------+ | +-----+ +-----+ |
+-+-----------------+-+ +--+ +--+
| |
| |
+-----------------+
The drive will operate in all axis (6 directions).
Mounting the drive
------------------
Mount the drive securely in the computer using M3X0.5 metric screws
in the four bottom mounting holes or the four side mounting holes.
You can mount the drive in any orientation. 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 apply more than 3 inch-pounds of torque.
- Do not insert mounting screws more than 0.15 inch.
Note. This drive meets industry-standard MCC mounting specifications.
When installing this drive in a fixed-mounting 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.
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.
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. Opening the case may void your computer's warranty.
4. Connect the 44-pin interface/power cable. Match pin 1 of the cable
to 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 cable should be no longer than 18 inches (0.457
meters).
Caution. The printed-circuit cables used in laptop computers are
very delicate. Be careful not to tear them.
Features
SEAGATE ST9420AG INSTALLATION GUIDE
Read before you begin
---------------------
Application. This drive uses the ATA interface and is designed for
IBM AT and compatible personal computers. It is intended for use with
UL-listed computers or similar products.
Warning. Turn off the computer (and remove the battery if you have a
notebook or laptop computer) before you open the case or
touch any internal components.
Caution. Special training or tools may be needed to service laptop
and notebook computers. In some cases, opening the case
may void your warranty.
Static discharge
Observe the following precautions:
- Before handling any components, put on a grounded wrist strap.
- Use antistatic padding on all work surfaces.
- Avoid static-inducing carpeted areas.
- Keep the drive in its static-shielded bag until you are ready to complete the installation. Do not attach any cables to the drive 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.
Maintenance and repair
----------------------
Seagate drives do not require maintenance.
The head/disc assembly is sealed; if you break the seal, you void the
warranty. Seagate customer service centers 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.
Configuring your computer
-------------------------
Before your computer can recognize a new drive, you must enter basic
information about the drive into the computer's longterm memory
(usually a battery-powered CMOS chip). The computer'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 drive
type and configure themselves appropriately at startup. Read
your system manual to determine whether this applies to your
computer. If so, then skip ahead to "Formatting and
partitioning the drive. If your computer cannot automatically
determine your drive type, 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 Marathon 420sl.
No. cylinders 988
No. read/write heads 16
No. sectors per track 52
Total no. sectors 822,016
Bytes per sector 512
Capacity (Mbytes): BIOS calculated 400 Usable 420
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 recognize your drive. In some computers you run the system
setup program by pressing special keys while the computer is
booting up. In other computers, you can 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 programs
provide a long list of predefined drive types. Select a drive
type with specifications that match those of your drive.
- 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 able to define a custom or
user defined drive type. You can then enter your drive
specifications.
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.
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 program does not allow
you to specify a custom drive type, your drive may be able to
emulate one of the predefined drive types. Select a predefined
drive type that has a capacity as close as possible to, but not
greater than, the BIOS calculated capacity of your drive.
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 SeaBOARD computer
bulletin board). FindType compares your drive's geometry with
all geometries supported by your computer's BIOS. FindType can
also determine whether an exact match exists between the drive
geometry and the system BIOS. If there is no match, FindType
selects the closest drive type supported by your computer's
BIOS.
The system setup program may request information on the drive's
write precomp or landing zone. However, you do not need to
enter any values, since your Seagate drive does not use these
parameters.
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 reenter this
data if your CMOS battery fails.
Formatting and partitioning the drive
-------------------------------------
Caution. Formatting or partitioning a drive that contains data may
destroy all data on the drive. Before repartitioning or reformatting
a drive that contains data, make sure all data on that drive has been
safely backed up. Seagate Technology assumes no liability for lost
data.
Low-level formatting
--------------------
Seagate ATA Interface drives are low-level formatted at the factory
and do not require additional low-level formatting before use.
Note. If you are installing only a single drive in your computer, you
can use the DOS program SETUP.EXE (supplied with MS-DOS 5.0
and above) to partition and format the drive. See your DOS
manual for details. After you successfully run SETUP.EXE, your
drive will be ready to use, and you can skip the partitioning
and formatting steps below.
Partitioning
------------
The partitioning process subdivides a single disc drive into
partitions that behave as separate logical drives (labeled C, D, E,
etc.). You can also set up the entire disc as a single partition.
1. Restart your computer. Boot up the computer using a diskette that
contains DOS system files.
2. Run the FDISK program. Insert a DOS program diskette containing
the FDISK program into your diskette drive.
At the DOS prompt, type fdisk and press
ENTER. Then follow the directions on the
screen to create one or more partitions.
See your DOS manual for details. If you are
partitioning a drive that will be used to
boot the computer, make sure that the
primary partition is marked active.
High-level formatting
---------------------
High-level formatting verifies the information written by the
low-level format and creates file allocation tables used to catalog
and access files.
Caution. Make sure that you know the correct drive letter for the
partition you wish to format. Formatting a drive that
contains data may destroy the data on that drive.
1. Run the FORMAT program. Insert a DOS program diskette containing
the FORMAT program into your diskette
drive. At the DOS prompt, type format,
followed by the drive letter for the first
drive partition you want to format (for
example, format C:). Then, press ENTER.
Repeat this procedure to format each of
the new drive partitions you have created.
Consult your DOS manual for FORMAT command
options.
Note. If you are formatting the drive partition that will be used to
boot your computer (the "C" drive), copy the DOS system files
to this drive. To do this, type /s after the format command
(for example, format C: /s)
2. Verify the drive capacity. After high-level formatting a drive,
you can verify the usable drive
capacity by running the DOS CHKDSK
utility program.
Storing and shipping your drive
-------------------------------
Keep your original box and packing materials for storing or shipping
your drive. The box has a Seagate Approved Package label. Shipping a
drive in an unapproved container voids the warranty. Call your
authorized Seagate distributor to purchase additional boxes.
My Books
