
S H D - 3 1 2 2 A    SAMSUNG
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders    1956|  937|     |
Capacity form/unform   252/      MB        Heads           4|   15|     |
Seek time   / track  16.0/ 4.0 ms          Sector/track     |   35|     |
Controller           IDE / AT              Precompensation
Cache/Buffer            64 KB LOOK-AHEAD   Landing Zone
Data transfer rate    3.213 MB/S int       Bytes/Sector      512
                      8.000 MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 55    |    -40 65
Power: sleep              W     Humidity     %         8 80    |      8 95
       standby            W     Altitude    km    -0.061  3.048| -0.305 12.192
       idle           3.8 W     Shock        g         5       |     75
       seek           5.6 W     Rotation   RPM      3600
       read/write     5.0 W     Acoustic   dBA        40
       spin-up            W     ECC        Bit   88,REED SOLOMON
                                MTBF         h     250000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,TUV,UL478


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SAMSUNG  SHD-3121A/3122A  PRODUCT MANUAL 264 034001 BAAC

  +---------------------------------------------------------+
  |                                     1+-+2 -C/D          |
  |                                     3| |4 DSP           |
  |                                      | |                |XX
  |                                     J2-+                |XX I
  |                                                         |XX N J1
  |                                                         |XX T
  |                                                         |XX E
  |                                                         |XX R
  |                                                         |XX F
  |                                                         |XX A
  |                                                         |XX C
  |                                                         |XX E
  |                                                         |XX
  |                                                         |XX
  |                                                         |  1
  |                                                         |XX J5
  |                                                         |XX Power
  +---------------------------------------------------------+  1



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SAMSUNG  SHD-3121A/3122A  PRODUCT MANUAL 264 034001 BAAC

 Jumper Setting
 ==============

 J2 Master/Slave
 ---------------

  +------+------+---------------------------------------------------+
  |-C/D  |DSP   |              Description                          |
  +------+------+---------------------------------------------------+
  |OPEN  |OPEN  |Slave drive - in the standard PDIAG-mode - for     |
  |      |      |compatibility with drives that PDIAG-line to handle|
  |      |      |Master/Slave communications                        |
  +------+------+---------------------------------------------------+
  |CLOSED|OPEN  |Master drive - in PDIAG-mode - using DASP- to check|
  |      |      |for the presence of a slave                        |
  +------+------+---------------------------------------------------+
  |CLOSED|CLOSED|Master drive- in PDIAG-mode - using the DSP jumper |
  |      |      |to determine whether a Slave is present, without   |
  |      |      |checking DASP-                                     |
  +------+------+---------------------------------------------------+


 C/D  Drive Select Jumper
 ------------------------
 You can daisy-chain two drives on the AT-Bus interface. When daisy-
 chaining two drives, specify one as the Master, the other as the
 Slave, using the Drive Select (C/D) jumper pins on the drives:

 To configure a drive as the Master (Drive 0), a jumper could be
 installed at the C/D pins.

 Samsung ships SHD-3121A/3122A hard disk drives from the factory with
 the C/D jumper installed (Drive 0).

 To specify a drive as the Slave (Drive 1), remove the C/D jumper.

 Note. The order in which drives are connected in a daisy chain has no
 significance.


 DSP  Drive Slave Present Jumper
 -------------------------------
 In combination with the current C/D jumper setting, the DSP jumper
 implements one of two possible configurations:

 When the drive is configured as a Master - that C/D jumper is
 installed, the DSP jumper informs the drive that a Slave drive is
 present. The DSP jumper should be installed on the Master drive only
 if the Slave does not use the Drive Active/Slave Present (DASP-)
 signal to indicate its presence.

 When the drive is configured as a Slave, both the C/D and DSP jumpers
 are not to be installed.


 Faceplate LED Operation
 -----------------------
 Whenever the drive initiates the execution of a command, a green LED
 on the faceplate light, and remains lit until the execution of the
 command is complete or aborted.



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SAMSUNG  SHD-3121A/3122A  PRODUCT MANUAL 264 034001 BAAC

 Notes on installation
 =====================

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

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

 The mounting holes on the SHD-3121A/3122A hard disk drive allow the
 drive to be mounted in any orientation. For mounting, #6-32 UNC
 screws should be used.

 Caution: The printed circuit board (PCB) is very close to the
 mounting holes. Do not exceed the specified length for the mounting
 screw. The specified screw lenght allows full use of the mounting-
 hole threads, while avoiding damaging or placing unwanted stress on
 the PCB. To avoide stripping the mounting-hole threads, the maximum
 torque applied to the screws must not exceed 8 Kg-cm (6.95 inch-
 pounds).

 Samsung ships the SHD-3121A/3122A hard disk drive with a faceplate
 installed.


 Ventilation
 -----------
 The SHD-3121A/3122A hard disk drive operates without a cooling fan,
 provided the ambient air temperatur does not exceed (55*C). Any user-
 designed cabinet must provide adequate air circulation, to prevent
 the maximum temperature from beeing exceeded.


 J1  AT-Bus Interface Connector
 ------------------------------
 On the SHD-3121A/3122A hard disk drive, the AT-bus interface cable
 connector (J1) is a 40-pin male Universal Header.

 To prevent the posibility of its incorrect installation, the
 connector should be keyed by removing Pin 20. This will ensure that
 the connector cannot be installed upside down. All signals are
 relative to pin 20.

 For the mating female J1 connector, recommended cable connectors
 include AMP receptacle P/N 1-499506-0, with strain relief: P/N
 1-746193-0, without strain relief; or an equivalent. To key the cable
 connectors, you must plug the connector that corresponds to Pin 20.

 Other recommended part numbers for the mating connector include:

 40-Pin Connector              3M 3417-7000, or equivalent
 Strain Relief                 3M 3448-2040, or equivalent
 Flat Cable (Strained 28 AWG)  3M 3365-40, or equivalent
 Flat Cable (Strained 28 AWG)  3M 3517-40 (shielded), or equivalent


 J5 DC Power Connector
 ---------------------
 The drives DC power connector (J5) is a 4-pin Elco Electronics
 Connector P/N 01-9091-0408-05-808, or equivalent, mounted on the back
 edge of the printed-circuit board (PCB).

 Recommended connectors and their numbers:

    4-Pin connector (P2):  AMP P/N 1-480424-0, or equivalent
    Loose-pice contacts:   AMP P/N 61173-4, or equivalent
    Strip contacts:        AMP P/N 350078-4, or equivalent

    pin 1    +12 VDC
    pin 2    +12 V Return (Ground)
    pin 3    + 5 V Return (Ground)
    pin 4    + 5 VDC

 Note: Labels indicate the pin numbers on the connector. Pins 2 and 3
 are connected on the drive.


            -------------------------------+
             -----J1-----1+  +-----J5-----+|
              ::::::::::::|  | 4  3  2  1 ||
              -----------2+  +------------+|
               ----------------------------+


 AT-Bus Interface Characteristics
 --------------------------------
 The AT-Bus interface supports one or two hard drives per adapter
 board, and a maximum of two adapter boards - or a maximum of four
 drives.


 Electrical Characteristics
 --------------------------
 All signals are TTL-compatible - with logic one greater than 2.0
 volts and less than 5.25 volts; and logic zero greater than 0.0 volts
 and less than 0.7 volts.
 Neither the adapter board not the drives require terminating
 resistors.



 Adapter Board Installation
 ==========================
 The adapter board is a half-size board and can be installed in any
 available 16-bit slot in an IBM PC-AT or compatible. Before install-
 ing the adapter board, make sure that no other hard drive controller
 resides at the primary hard drive address, 1F0H-F7H.

 If a combination floppy and hard drive controller is present, the
 hard drive controller functions on the floppy/hard drive controller
 must be disabled. To disable hard drive controller functions on a
 floppy/hard drive controller, follow these instructions:

 - On a Western Digital WD1002-WA2 or WD1003-WA2 floppy/hard drive
   controller card:

   1. Do not install jumpers on pin E5 and E6. Install jumpers on pins
      E4 and E5, to ensure that the controller card resides at the
      secondary address, 170H-177H, rather than at the primary, 1F0H-
      1F7H.
   2. Move the card from a 16-bit I/O slot to disconnect the IRQ14
      output driver.

 - On a DTC (Data Technology Corporation) floppy/hard drive controller
   card:

   1. Install a jumper on pins W3.
   2. Move the card from a 16-bit I/O slot to disconnect the IRQ14
      output driver.


 Connecting the Adapter Board and the Drive
 ------------------------------------------
 Use the ribbon cable supplied with the adapter board to connect the
 drive to the board. To ensure that the cable is plugged into the
 adapter board and the drive correctly, there is a red wire at one
 edge of the cable. To connect the drive to the board:

 1. Note the number 1 printed on the board next to the connector. When
    one end of the cable into the connector on the adapter board, make
    sure the red wire on the cable is at the side of the connector
    labeled 1.

 2. When inserting the other end of the cable into the connector on
    the drive, makes sure the red wire is at the inside edge of the
    drive connector, next to the J5 power connector.

 To complete the installation of the drive, secure it to the system
 chassis using the mounting screw.



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SAMSUNG  SHD-3121A/3122A  PRODUCT MANUAL 264 034001 BAAC

 Introduction
 ------------
 SHD (Samsung Harddisk Drives) 3121A/3122A hard disk drive is a
 high performance, 1-inch-height form factor with the highest product-
 ability and quality. This uses 3  inch rigid disks, and is available
 with AT (Advanced Technology) interface.

 The SHD-3121A/3122A features and embedded AT commands to optimize
 system performance. Because the drive manages media defect and error
 recovery internally, these operations are fully transparent to the
 user.

 Features
 --------
 Key feature of the SHD-3121A/3122A hard disk drive include:

 - Low profile, 1-inch-height form factor

 - High accuracy of Rotary voice coil actuator with an embedded sector
   servo

 - Average seek time of 16 milliseconds

 - Low power consumption

 - Proprietary 64K read look-ahead

 - Automatic error correction and retries

 - Transparent media-defect mapping

 - High-performance, in-line defective sector skipping

 - Reassignment of defective sector skipping

 - Automatic magnet latch achieving zero power consumption

 - 1 : 1 interleave on read/write operations

 - Emulation of IBM, PC-AT, task file register and all AT fixed
   commands

 - Ability to daisy-chain two drive on the interface


 Seek Time
 ---------

        ----------------------------------+--------+
        Single-Track Seek      msec. typ. |   4    |
                       Average msec. typ. |  16    |
        Full-Stroke            msec. typ. |  29    |
        Latency                msec. avg. |   8.3  |
        Power-up Time           sec. typ. |   8    |
        Power-down Time         sec. typ. |   7    |
        ----------------------------------+--------+


 Error Register
 --------------
 The error register contains status information about the last
 command by the drive. The contents of this register are valid only
 when the error bit (ERR) in the Status Register is set to one -
 except at power on or at the completion of the drive's internal
 diagnostics, when the register contains a status code. When the error
 bit in the Status Register is set to one, the host interprets the
 Error Register bit as shown in following Table.

  +----------+-----+-------------------------------------------------+
  | MNEMONIC | BIT |            DESCRIPTION                          |
  +----------+-----+-------------------------------------------------+
  | BBK      |  7  |Bad block mark detected in the requested sector's|
  |          |     |ID field                                         |
  +----------+-----+-------------------------------------------------+
  | UNC      |  6  |Uncorrectable data error encountered             |
  +----------+-----+-------------------------------------------------+
  |          |  5  |Not used                                         |
  +----------+-----+-------------------------------------------------+
  | IDNF     |  4  |Requested sector s ID field not found            |
  +----------+-----+-------------------------------------------------+
  | ABRT     |  2  |Requested Command aborted due to a drive status -|
  |          |     |error such as, Not Ready or Write Fault - or     |
  |          |     |because the command code is invalid              |
  +----------+-----+-------------------------------------------------+
  | TK0NF    |  1  |Track 0 not found during execution of Recalibrate|
  |          |     |command                                          |
  +----------+-----+-------------------------------------------------+
  | DAM      |  0  |Data address mark not found after correct ID     |
  |          |     |field found (not used)                           |
  +----------+-----+-------------------------------------------------+


