
M K - 1 9 2 6 F B V    TOSHIBA
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders    2920|     |     |
Capacity form/unform   815/      MB        Heads           6|     |     |
Seek time   / track  13.0/ 3.0 ms          Sector/track  119|     |     |
Controller           SCSI2 SI/FAST         Precompensation
Cache/Buffer           128 KB READ-AHEAD   Landing Zone
Data transfer rate    5.000 MB/S int       Bytes/Sector      512
                     10.000 MB/S ext SYNC
Recording method     PRML 8/9                       operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -20 60
Power: sleep          0.2 W     Humidity     %                 |
       standby        0.3 W     Altitude    km    -0.300  3.000| -0.400 15.000
       idle               W     Shock        g       100       |    200
       seek           2.4 W     Rotation   RPM      4200
       read/write     2.5 W     Acoustic   dBA        33
       spin-up            W     ECC        Bit   168BIT,ON THE FLY
                                MTBF         h     300000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,TUV,UL12750              

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                        L   A   Y   O   U   T
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TOSHIBA  MK1926FBV  PRODUCT SPECIFICATION 71Y102826  29/05/1995





     39-------------------------------------1---7-----1+
     |o o o o o o o o o o o x o o o o o o o o x o o o o|
   --+o o o o o o o o o o o o o o o o o o o o x o o o o+-----
     40-------------------------------------2---8-----2+

 x = Polarity key











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                      J   U   M   P   E   R   S
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TOSHIBA  MK1926FBV PRODUCT SPECIFICATION 71Y102826 29/05/1995

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


                           +------- E3
          +5V LOGIC ---+   | +----- E1
          +5V RETURN + |   | |  +-- RESERVED
                     | |   | | +++
  ---------------------1---7-----1+
   o o x o o o o o o o o x o o o o|
     o o o o o o o o o o x o o o o+-----
         --------------2---8-----2+
                     | |   | | +++
 x = Polarity key    | |   | |  +-- RESERVED
                     | |   | +----- E2
                     | |   +------- SYNC (LED)
                     | +----------- +5V LOGIC
                     +------------- +5V RETURN

 Pin 37/38 +5V RETURN
 Pin 39/40 +5V MOTOR

 NOTE
 Two types of drives, one with internal pull-up resistors for all
 interface signals and the other one without resistors, are available.

 For the drives with pull-up resistors, +5V power must be provided to
 the TERMPWR pin (pin #24) for the power source of the pull-up
 resistors.

 For the drive without pull-up resistors, TERMPWR pin (pin #24) is
 left open in the drive.


 SCSI ID
 -------
   +----------+-----------------------+
   | SCSI ID  |        Jumpers        |
   |          |  E3   |  E2   |  E1   |
   +----------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  |
   +----------+-------+-------+-------+
   |    1     | OPEN  | OPEN  | CLOSED|
   +----------+-------+-------+-------+
   |    2     | OPEN  | CLOSED| OPEN  |
   +----------+-------+-------+-------+
   |    3     | OPEN  | CLOSED| CLOSED|
   +----------+-------+-------+-------+
   |    4     | CLOSED| OPEN  | OPEN  |
   +----------+-------+-------+-------+
   |    5     | CLOSED| OPEN  | CLOSED|
   +----------+-------+-------+-------+
   |    6     | CLOSED| CLOSED| OPEN  |
   +----------+-------+-------+-------+
   |    7     | CLOSED| CLOSED| CLOSED|
   +----------+-------+-------+-------+



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                      I   N   S   T   A   L   L
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TOSHIBA  MK1926FBV  PRODUCT SPECIFICATION 71Y102826  29/05/1995

 Notes On Installation
 =====================

 Installation
 ------------
 The drive should be mounted carefully on the surface of 0.2 mm
 flatness or less to avoid excessive distortion. It is recommended
 the space greater than 1 mm is kept under the PCB and it is important
 to check enough for safe design to prevent short- circuit under any
 circumstances. Enough room to avoid any mechanical interference
 when receiving shock or vibration is required especially around the
 convex portion in the HDA. The temperature of the top cover and the
 base must be kept under 60*C at any moment to maintain the desired
 reliability.

 The M3 mounting screw holes are tapped directly on the aluminium
 portion of HDA for electrical ground. The others are tapped on the
 plastic portion for electrical insulation. Screw holes for mounting
 can be determined by the evaluation results of the electromagnetic
 noise emitted from the host system to drive. The breathing hole
 should be kept open after mounting. A maximum force of 2N should be
 allowed on the top cover to avoid the drive damage.

 The drive is using several parts which can be easily damaged by ESD
 (Electric Static Discharge), so do not touch the interface
 connector pins and the surface of PCB.


 Screwing
 --------
 Four screws should be tightened equally with 0.3N.m (3 kgf.cm)
 torque. The depth should be 3.0 mm min. 4.0 mm maximum.


 Cable Connection
 ----------------
 +------------------------+---------------------------------------+
 |Interface Connector     |                                       |
 |Drive side connector    |   Yamaichi GAP050K15037               |
 +------------------------+---------------------------------------+
 |Mating Connector        |   2.0 mm pin including power lines and|
 |                        |   jumper post                         |
 +------------------------+---------------------------------------+
 |Recommended host 40-PIN |                                       |
 |side connector          |                                       |
 |for board               |  right angle type: Berg 88333-040     |
 |                        |  straight type:    AMP 6-176135-5     |
 |    --------------------+---------------------------------------+
 |for cable               |  Berg 89361-040                       |
 |                        |  AMP 111-624-9                        |
 +------------------------+---------------------------------------+
 |Recommended host 50-PIN |                                       |
 |side connector          |                                       |
 |for board               |  right angle type: Berg 88333-050     |
 |                        |  straight type:    AMP 6-176135-6     |
 |    --------------------+---------------------------------------+
 |for cable               |  Berg 89361-050                       |
 |                        |  AMP 1-111-624-1                      |
 +------------------------+---------------------------------------+


 Cable
 Twisted pair type cable is recommended as follows:
 Standard diameter           0.32mm (28 AWG)
 Characteristic impedance    100-132

 Cable length
 +------------------------+----------------------+------------------+
 |Transfer rate (MB/s MAX)| Cable length (m MAX) | Number of units  |
 |                        |                      | (Incl. initiator)|
 +------------------------+----------------------+------------------+
 |     10                 |         0.6          |       2          |
 +------------------------+----------------------+------------------+
 |      4                 |         1.0          |       2          |
 +------------------------+----------------------+------------------+
 |      3                 |         4.0          |       5          |
 +------------------------+----------------------+------------------+
 |      2.5               |         6.0          |       8          |
 +------------------------+----------------------+------------------+
 If SCSI cables have different characteristic impedance, the data
 integrity is not guaranteed. The SCSI cable should be terminated at
 the ends by a device with termination resistors.



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                      F   E   A   T   U   R   E  S
**********************************************************************
TOSHIBA  MK-1926FBV  PRODUCT SPECIFICATION 71Y102826  29/05/95

 General Description
 -------------------
 The MK1926FBV cpmprises a series of intelligent disk drives, herein-
 after referred to as the MK1926FBV or simply as the drive.

 The drive features a SCSI embedded controller that realizes FAST
 SCSI-2 interface. The drive employs Winchester technology and a
 closed loop servo control system to realize recording density of
 711 kbit/mm  (459 Mbit/inch ) and average access time of 13 msec
 with highest reliability of 300,000 hours for MTTF.


 Some Key Features
 -----------------
 - Quick spin up of Spindle Motor 5sec.

 - Average access time of 13 msec realized by optimized balance of a
   heead actuator assembly and an efficiently designed magnet of
   Rotary VCM.

 - Read ahead cache and write cache enhancing system throughput.

 - Fail-safe power down return heads to landing zone with automatic
   carriage lock realized high immunity to operating shock 1,000 m/s .


