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Hard Drive: IBM: WDA-2120 126MB 2.5"/SSL IDE / AT

W D A - 2 1 2 0    IBM
NO MORE PRODUCED                                      Native|  Translation
Form                 2.5"/SUPERSLIMLINE    Cylinders    1248|  969|     |
Capacity form/unform   126/      MB        Heads           4|   15|     |
Seek time   / track  16.5/ 5.0 ms          Sector/track   50|   17|     |
Controller           IDE / AT              Precompensation
Cache/Buffer               KB              Landing Zone
Data transfer rate    1.888 MB/S int       Bytes/Sector      512
                            MB/S ext
Recording method     RLL                            operating  | non-operating
Supply voltage     5 V          Temperature *C         5 55    |    -40 65
Power: sleep              W     Humidity     %         8 90    |      5 95
       standby        0.3 W     Altitude    km    -0.100  3.000| -0.300 12.000
       idle           1.3 W     Shock        g        10       |    100
       seek           2.0 W     Rotation   RPM      3600
       read/write     2.1 W     Acoustic   dBA
       spin-up        4.2 W     ECC        Bit
                                MTBF         h     150000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,EEC,ESD,FCC,IEC950,RES...



 44-pin AT Connector
       |                                                 |
       | Connector Side View                             |
       |                                                 |
       |44                                     2   x x   |
                                                   P P
 Pin 20 position is left blank for secure          1 1
 connector insertion.

 Pin 44 -XT/AT. This line is pulled-up to +5V through 4.7Kohm in HDD
 (High = AT mode)



Jumper Setting

TP1 is used for manufacturer's test purpose. These pins shall be
left unconnected.

JP1 is used to characterize a drive to DRIVE-0 or DRIVE-1. A jumper
plug in the JP1 position forces DRIVE-0 mode.



Notes on Installation

Installation direction

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
                                   |  |     |           |     |  |
 +---------------------+           |  +-----+           +-----+  |
 +-+-----------------+-+           +--+                       +--+
   |                 |
   |                 |

The drive will operate in all axis (6 directions).

Mounting Orientation
The disk drive shall operate within specified error rates in all axis
with no limitation. The test was done within 5 degrees from these

Performance and error rate must stay within specification limits if
the disk drive is operated in the other permissible orientations from
which it was formatted. Thus a disk drive formatted in a horizontal
orientation must be able to run vertically and vice versa.

The maximum cable length from the host system to the HDD plus circuit
pattern length in the host system shall not exceed 18 inches.

The following labels are affixed to every disk drive.

 1. A label placed on the top of the HDA containing the statement
    "Made by IBM" or equivalent, Part No., EC No. and FRU No.

 2. A label containing the vendor's name, HDD model number, unit
    serial number, place of manufacturing and safety approval (e.g.
    UL/CSA) logos.

 3. A bar code label can be attached on the HDD cover per user's
    request. The location on the disk drive will be designated by
    Low-end Storage Development.

Except for the bar code, labels may be integrated with YAMATO
designed label.

Cooling requirement
The user is responsible to provide sufficient air movement to main-
tain 60*C maximum at the center of TOP COVER of HDD unit.

Interface Logic Signal Levels
The interface logic signal have the following electrical

 Inputs:  Input High Voltage    -   2.0 V min.
          Input Low Voltage     -   0.8 V max.

 Outputs: Output High Voltage   -   2.4 V min.
          Output Low Voltage    -   0.5 V max.

 Current: Driver Sink Current   -   24 mA min.
          Driver Source Current - -400 mA min.

Addressing of HDD Registers
The host addresses the drive through a set of registers called the
Task File. These registers are mapped into the host's I/O space. Two
chip select lines (-CS0 and CS1) and three address lines (ADDR 0-2)
are used to select one of these registers, while a -IOR or -IOW is
provided at the specified time.

The -CS0 is used to address Command Block registers, while the CS1 is
used to address Control Block registers.



This specification describes the characteristics of a 63/126
(decimal) MB capacity, 2.5 inch hard disk drive for the user's view

 Seek Time
       |                                  |S260/2120|
       |Track-to-Track         msec. typ. |   5     |
       |                       msec. max. |   5.5   |
       |Average                msec. typ. |18.5/16.5|
       |                       msec. max. |19  /17  |
       |Full                   msec. typ. |  29.5   |
       |                       msec. max. |  30     |
       |Latency                msec. avg. |   8.33  |

Data integrity
During write operation, no more than one sector is lost under Soft or
Hard Reset condition.

 MTBF                     : 150,000 Power-On Hours
 File Design Life         : 5 Years
 Unrecoverable Data Error : Less than one error in 1E13 bits transfer
                            (any condition)

Sound Power Levels
The upper limits of A-weighted and the octave sound power levels
(LWoct)spec are given in Bels (b) relative to 1 pico Watt and are
shown in the following table.

 |         |Octave Band Center Frequency (Hz) |   A-weighted|
 |         +----+----+----+----+----+----+----+   BA        |
 |Mode     | 125| 250| 500| 1 k| 2 k| 4 k| 8 k|             |
 |Idling   | 5.0| 4.6| 4.2| 4.2| 4.2| 4.2| 4.0|   4.5       |
 |Operating| 5.3| 4.8| 4.7| 4.7| 4.7| 4.5| 4.0|   4.8       |



IDE Installation Guide Generic

Installation requirements
To install an IDE drive inside your computer, you must have:

1 The documentation that came with your computer.

2 The documentation that came with your hard drive.

3 A small, flat blade screwdriver.

WARNING: Do not open the static-protective bag containing the drive
until instructed to do so. Static electricity can damage the drive.

Preparing the drive for installation
Master drive If this drive is the first or primary hard disk drive to
be installed inside your computer, check the manual that came with
your hard drive to locate the Master setting. If your drive is set to
a Master, do not change the jumper position.

Slave drive If this drive is the second or secondary hard disk drive
in your computer, you must change the jumper position on the drive to
Slave. Refer to the manual that came with your hard disk drive to
locate the Slave setting.

To change the jumper on the hard disk drive:

 1 Remove the drive from the static-protective bag and place it on top
   of the bag.

2 Refer to your manual and locate the pins.

 3 If you need to change the setting, grasp the jumper and pull it off
   the pins.

 4 Line up the two holes in the bottom of the jumper with the
   approprate two pins on the drive. Push the jumper onto the pins
   until the jumper is completely seated and covers both pins.

Installing the drive
For the specific information on installing a hard disk drive, refer
to the documentation that came with your computer. You will be
required to mount the drive inside your computer, connect signal and
power cables to the hard drive, and update the configuration

Handling precautions
01 Turn off all attached devices first; then turn off the computer.

 02 Unplug all the power cords from electrical outlets before starting

 03 Disconnect all power cables from your computer and attached
    devices before starting installation.

 04 Limit your movement. Movement can cause static electricity to
    build up around you.

05 Handle the drive carefully and by the edges.

06 Do not touch any exposed printed circuitry.

07 Prevent other people from touching the components or the drive.

 08 When you are installing the drive, touch the static-protective
    package containing the drive to a metal expansion-slot screw or
    other unpainted metal surface on the computer, for at least 2
    seconds. (This drains static electricity from the package and your
 09 When possible, remove the drive and install it directly into the
    computer without setting it down. If this is not possible, place
    the drive, component side up, on the static-protective bag on a
    flat surface until the drive is installed.
 10 Do not place the drive on the computer cover or on a metal table.

Note: Be sure to use the correct screws provided with your drive.
Using the wrong ones might cause damage to the drive.

Completing the installation procedure
The installation of the drive is complete. Reinstall the cover on the
computer or storage enclosure. Store these instructions and any extra
parts in a safe place in case you change your configuration.
After installing your hard disk drive, use the information that came
with your computer to reconfigure your system. When you power on your
system, turn on all attached devices first; then turn on the

If you have any problems at this point, turn off all attached
devices; then, turn off the computer and check that:

1 The cables are installed correctly

2 No options or cables are loose

 3 The jumpers are properly set Turn on all attached devices; then,
   turn on the computer. If you still have a problem, refer to the
   troubleshooting information in the documentation that came with
   your computer.

Update configuration
Whenever you add or remove an option from your computer, you must
update the configuration information. Your computer might have an
automatic configuration program, or you might have to follow a
specific procedure. For more information, refer to the documentation
that came with your computer.

Preparing the drive for use
Having successfully installed the hard disk drive, you need to
prepare it for use. Depending on the operating system you are using,
you might need to partition then format the hard disk. Refer to the
documentation that came with your operating system for information on
how to format your new drive.
To make the drive just installed your primary drive, you might need
to create a new system partition on the drive. For information on
creating a new system partition, refer to the documentation that came
with your operating system.

You might be able to solve a problem yourself. Before calling IBM,
you might want to try some or all of the following troubleshooting

1 Remove and reattach all drive cables

2 Remove and reseat the drive

3 Place the drive in a different slot, if one is available

 4 If your drive contains jumpers or switches, check that they are set
   as specified

 5 Reread any software instructions; be sure software settings are

6 Inspect the drive for damage, such as bent pins

 7 Check the computer manual for instructions about the installation
   of upgrades. Look for a section about system setup or system
   configuration. Follow all procedures.

 8 After completing these steps, reassemble the computer and connect
   the power cord

If you are still having problems and want to call IBM technical
support, have available as much of the following information as

1 Drive model or P/N and description

2 Computer manufacturer and model

3 Exact wording of error message (if any)

4 Description of the problem

5 Hardware and software configuration information for your system

If possible, be at your computer. Your technical support rep might
want to walk you through the problem during the call.

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