
S T 4 2 3 4 5 1 F C     E L I T E   2 3    SEAGATE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    6884|     |     |
Capacity form/unform 23400/      MB        Heads          28|     |     |
Seek time   / track  13.0/ 1.5 ms          Sector/track     |     |     |
Controller           FIBRE CHANNEL DUAL    Precompensation
Cache/Buffer          2048 KB MULTI-SEGMEN Landing Zone
Data transfer rate   12.000 MB/S int       Bytes/Sector      512
                    100.000 MB/S ext
Recording method     PRML 0/4/4                     operating  | non-operating
                                                  -------------+--------------
Supply voltage                  Temperature *C         5 50    |
Power: sleep              W     Humidity     %                 |
       standby            W     Altitude    km                 |
       idle          22.0 W     Shock        g                 |
       seek          27.0 W     Rotation   RPM      5400
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h     800000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates                                  

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SEAGATE  ST423451N/W/WD  INSTALLATION GUIDE 83329130 REV. A

 Notes on Installation
 =====================

 Installation direction
 ----------------------

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

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


 Orientation
 -----------
 We recommend orienting the drive or directing the air flow in a way
 that creates the least amount of air-flow resistance while providing
 air flow above the circuit boards and around the head and disc
 assembly (HDA). Also, choose the shortest possible path between the
 air inlet and exit. This minimizes the distance traveled by air that
 is heated by the drive and by other nearby heat sources.

 The air-flow patterns can be created by the fans either pushing or
 drawing air. The overall flow pattern can be directed from front to
 back, back to front, or side to side.


 Mounting the drive and connecting cables
 ----------------------------------------
 Do not touch the connector pins or any components on the control
 board without observing static-discharge precautions.

 Always handle the drive by the frame only.

 The drive may be mounted in any orientation (horizontally,
 vertically, and any combination thereof); however, you must ensure
 that the drive receives adequate air flow for cooling.

 1. Mount the drive to the host system's chassis using four 6-32 UNC
    screws. Two mounting holes are in each side of the HDA and there
    are four mounting holes in the bottom of the HDA. The maximum
    length that the screws should extend into the HDA mounting holes
    is 0.17 inch (4.318 mm), measured from the outer surface of the
    HDA. Tighten the screws down evenly. Do not over-tighten or force
    the screw if it does not seem to screw in easily, because this
    means the threads are not properly aligned. In this case, back the
    screw out and try again.

 2. Verify that all connections between the drive and the host system
    are correctly installed.

 3. Verify that you have correctly installed jumpers.

 4. Connect the SCSI cable into the drive's SCSI connector. Take care
    not to stretch or crimp this cable, and do not block the system's
    cooling air flow with the cable. The drive receives DC power
    through a 4-pin connector mounted next to the SCSI connector. The
    output of a power supply must meet SELV (safety extra low voltage)
    as defined in IEC 950. To connect the DC power cable to the drive,
    simply insert the cable end into the drive's DC power connector.

 Note. Signal ground on the printed circuit board assembly (PCB) and
       the head and disc assembly (HDA) are connected together in
       this drive and you cannot separate them. Ensure the equipment
       in which you have mounted the drive is connected directly to
       the HDA. Maximizing the conductive contact area between HDA
       ground and system ground may reduce radiated emissions.

 If you do not want the system chassis to be connected to the HDA/PCB
 ground, you must provide a nonconductive (electrically isolating)
 method of mounting the drive in the host system. This may increase
 radiated emissions and is the system designer's responsibility.

 5. Replace the host system's cover.



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NEVER








                 Announced but never produced.

                        NEVER PRODUCED!!!


