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Hard Drive: FUJITSU: M2230AS 5MB 5.25"/FH MFM ST412




M 2 2 3 0 A S    FUJITSU
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders     320|     |     |
Capacity form/unform     5/    7 MB        Heads           2|     |     |
Seek time   / track  83.0/18.0 ms          Sector/track   32|     |     |
Controller           MFM / ST412           Precompensation   128
Cache/Buffer               KB              Landing Zone      319
Data transfer rate    0.625 MB/S int       Bytes/Sector      256
                      0.625 MB/S ext
Recording method     MFM                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 45    |    -40 60
Power: sleep              W     Humidity     %        20 80    |      5 95
       standby            W     Altitude    km            3.000|        12.000
       idle               W     Shock        g         2       |      3
       seek               W     Rotation   RPM      3600
       read/write    27.0 W     Acoustic   dBA        40
       spin-up            W     ECC        Bit
                                MTBF         h      10000
                                Warranty Month
Lift/Lock/Park     NO           Certificates                                  

Layout

FUJITSU M2230-/M2233-/M2234-/M2235-AS OEM MANUAL B03P-4695-0015A..0

  +------------------------------------------------------+
  |                                                      |xx B cable
  |                                                      |xx card
  |                                                      |xx edge
  |                                                      |xx
  |                                                      |xx
  |                                             +------+ |xx
  |                                             | SW1  | |xx
  |                                             +------+ |
  |                                                      |xx A cable
  |                                                      |xx card
  |                                                      |xx edge
  |                                                      |xx
  |                                                      |xx
  |                                                      |xx
  |                                                      |
  |                                                      |XX Power
  |                                                      |XX
  +------------------------------------------------------+

Jumpers

FUJITSU M2230-/M2233-/M2234-/M2235-AS OEM MANUAL B03P-4695-0015A..03

Jumper Settings
===============

 Drive Selected Signal
 ---------------------
 Control of DRIVE SELECTED Signal .... Key 1 in SW1
 "ON" side ... A drive is in a selecded state regardless of DRIVE
               SELECT 1   4, which means DRIVE SELECTED signal is
               always true ans all Input/Output signals are validated
               without selecting the drive.
 "OFF" side .. Drive Selected signal gets true and all Input/Output
               signals are validated only when a drive is selected
               with DRIVE SELECT 1   4.

 Drive Selection
 ---------------
 DRIVE SELECTION ..... Key 4   Key 7 in SW1
 Key 4   7 in SW1 are used to one logical number up to a maximum of 4
 drives. The relevant one of 4 keys is to turned "ON" while the others
 should be turned "OFF".

 +----------+---------------+
 | Drive    |Key No. in SW2 |
 | Number   +---+---+---+---+
 |          | 7 | 6 | 5 | 4 |
 +----------+---+---+---+---+
 |    1     | o | x | x | x |
 +----------+---+---+---+---+
 |    2     | x | o | x | x |
 +----------+---+---+---+---+
 |    3     | x | x | o | x |
 +----------+---+---+---+---+
 |    4     | x | x | x | o |
 +----------+---+---+---+---+
 o: "ON"
 x: "OFF"

Install

FUJITSU M2230-/M2233-/M2234-/M2235-AS OEM MANUAL B03P-4695-0015A..03

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

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

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
      x           x                |  |     |           |     |  |
 +------x------x-------+           |  +-----+           +-----+  |
 +-+------x--x-------+-+           +--+                       +--+
   |       xx        |
   |     x    x      |
   +---x--------x----+
     x              x

The unit may be installed in its locker either horizontally or ver-
tically, except the horizontal position with the PCB on top.

Frame structure
---------------
The disk enclosure (Signal ground) is isolated from the drive
mounting frame (Frame ground). When mounting the drive in a cabinet
frame, the frame should clear the drive by at least 3.5 mm to prevent
the drive from touching the cabinet frams.

Ambient temperature
-------------------
The operating temperature range of the drive is specified at a dis-
tance of 3 cm from the drive.

Service area
------------
When preparing to ship the drive, the heads should be positioned at
the inner most (maximum) cylinder. (The heads will automatically
Seek to Track 0 at Power up).

 Multiple units connection
 --------------------------
 +-------------+ A cable      +--------------+
 |             +----------*---+  Drive 1     |
 |             +----------+---+              |
 |             | B cable  |   +--------------+
 |             |          *---+  Drive 2     |
 |             +----------+---+              |
 | Controller  | B cable  |   +--------------+
 |             |          *---+  Drive 3     |
 |             +----------+---+              |
 |             | B cable  |   +--------------+
 |             |          +---XX Terminator  |
 |             +--------------+  Drive 4     |
 |             |              +--------------+
 |             |
 +-------------+

Connection of units to its controller is shown in that figure. The
cable A (control signals) must be connected in series and the B
cable (R/W signals) in parallel. The termination of control signal
must be performed only at the last drive.

The total control cable length in a multi-drive configuration should
not exceed 6m.

 Power cable
 -----------
 +-----------------+  1 = +12 V
 |  4   3   2   1  |  2 = +12 V RTN
 +-----------------+  3 = + 5 V RTN
                      4 = + 5 V

Noise filter
------------
To eliminate AC line noise, a noise filter of the specifications
given below should be incorporated in the AC input terminal of the
disk drive power supply.

Attenuation characteristic: 40 dB or greater at 10MHz
Circuit configuration: T type

Features

FUJITSU M2230-/M2233-/M2234-/M2235-AS OEM MANUAL B03P-4695-0015A..03

Media error
-----------
Cylinder 0, Head 0 and 1 are defect free.
The number of defect in the M223xAS are as follows:

 M2230 .... max. 6
 M2233 .... max. 12
 M2234 .... max. 18
 M2235 .... max. 24

Mean Time Between Failures (MTBF)
---------------------------------
The estimated MTBF of this drive during its life time is 10,000
hours.

Mean Time To Repair
-------------------
MTTR is the average time taken by well-trained service mechanic to
diagnose and repair a unit malfunction. The M223xAS is designed for a
MTTR of 30 minutes or less.

Service life
------------
Overhaul of the M223xAS is not required for the first five year.

Power loss
----------
Integrity of the data on the disk is guranted against all froms of
abnormal DC power failure except a power failure during writing.

Write Precompensation
---------------------
Whenever two bits are written in close proximity to each other, a
phenomenon called pulse superposition occurs, which tends to cause
the two bits to move away from each other. This is a large factor
contributing to bit shift.
The effect of bit shift can be reduced by a technique called pre-
compensation which, by detecting which bits will occur early and
which bits will occur late, can effectivly minimize the shift by
writing these bits in the opposite direction of the expected shift.
Precompensation should be done at 128 319 cylinders, but may be
done at all cylinders. The optimum amount of pre-compenation is 12
nanseconds for both early and late written bits.

Start and stop time
-------------------
Start time (time from when power is turned on until the unit is
ready) is 20 seconds or less and stop time (time to completely stop
when power is turned off) is 15 seconds or less using dynamic
braking.













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