
A - 2 6 0 A T    AREAL
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders    1453|  856|     |
Capacity form/unform   263/      MB        Heads           4|   10|     |
Seek time   / track  15.0/ 3.0 ms          Sector/track     |   60|     |
Controller           IDE / AT              Precompensation
Cache/Buffer            32 KB              Landing Zone
Data transfer rate    1.500 MB/S int       Bytes/Sector      512
                            MB/S ext
Recording method     RLL 1/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5 V          Temperature *C         5 55    |    -40 60
Power: sleep          0.1 W     Humidity     %         8 80    |      8 80
       standby        0.2 W     Altitude    km    -0.061  3.048| -0.061 12.192
       idle           1.6 W     Shock        g        10       |    100
       seek           3.1 W     Rotation   RPM      2981
       read/write     2.2 W     Acoustic   dBA        35
       spin-up        4.8 W     ECC        Bit   88,REED SOLOMON
                                MTBF         h     100000
                                Warranty Month
Lift/Lock/Park     YES          Certificates     CSA,TUV,UL1950               

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                        L   A   Y   O   U   T
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AREAL    A-130/A-260  TECHNICAL MANUAL REV. 2.0, JULY 1, 1993

  +---------------------------------------------------------+
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  |         PCBA SIDE                                       |XX I
  |                                                         |XX N
  |                                                         |XX T
  |                                                         |XX E
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  |                                                         |XX F
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  |                                                         |XX C
  |                                                         |XX E
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  |                                                         |  2
  |                                                         |XXJP1
  |                                                         |XX50
  +---------------------------------------------------------+



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                      J   U   M   P   E   R   S
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AREAL    A-130/A-260  TECHNICAL MANUAL REV. 2, JULY 1, 1993

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

 x = Factory default configuration


 JP1  Master/Slave Configuration
 -------------------------------
 Interface Pins 47 and 48

   OPEN    Master
   CLOSED  Slave



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                      I   N   S   T   A   L   L
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AREAL    A-130/A-260  TECHNICAL MANUAL REV. 2.0, JULY 1, 1993

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

 Recommend Mounting Configuration
 --------------------------------

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

 The drive is designed to be used in applications where the unit may
 experience extreme levels of both shock and vibration. There are no
 limits on mounting orientation and mounting clearance is not
 required. Maximum insertion length of the 3 mm x .5 screws is 0.15"
 (3.81 mm).


 Physical Connection - AT Interface
 ----------------------------------
 Both power and control signals are supplied to the drive through a
 single 44 pin cable. Please note that separate power is supplied to
 the logic and motor circuits to minimize noise coupling.

 Maximum length of this 44 pin cable is 18 inches (457 mm) since it is
 TTL driven. Two drives may be daisy chained on this cable, however,
 the cable remains restricted to 18 inches.

 Recommended mating connectors are as follows:

 +-------------------+-------------+---------+-------------------+
 |Connector Style    |    3M       |Dupont   | Elco              |
 +-------------------+-------------+---------+-------------------+
 |Flex Cable         |    N/A      |86456-044|N/A                |
 +-------------------+-------------+---------+-------------------+
 |Ribbon Cable       |    N/A      |N/A      |20-8394-2044-04-101|
 +-------------------+-------------+---------+-------------------+
 |PCBA Straight      |    N/A      |86455-044|20-8390-2044-00-101|
 +-------------------+-------------+---------+-------------------+
 |PCBA Rigth Angle   |             |         |                   |
 |Areal Org. Height  |150250-5122TH|N/A      |N/A                |
 |MCC Spec Height    |150250-5022TH|88333-044|20-8390-2044-04-101|
 +-------------------+-------------+---------+-------------------+


 Electrical Description - AT Interface
 -------------------------------------
 All signal levels are TTL compatible. A logic "1" is from 2.0 volts
 to 5 volts. A logic "0" is from 0.0 volts to 0.7 volts.

 The interface between the drive adapter and the drive is termed the
 "Host Interface". The set of registers in the I/O space of the Host
 is known as the "Task File".

 All signals on the Host Interface have the prefix Host. All negativ-
 ely active signals are prefixed with a "-" designation. All positiv-
 ely signals are prefixed with a "+" designation. Signals whose source
 is the Host are "outbound" and those whose source is the drive are
 "inbound".

      +------+-------------------+------+----------------+
      | Pin  | Signal            | Pin  | Signal         |
      +------+-------------------+------+----------------+
      | 01   | -Host Reset       | 02   |  Gnd           |
      | 03   | +Host Data 7      | 04   | +Host Data  8  |
      | 05   | +Host Data 6      | 06   | +Host Data  9  |
      | 07   | +Host Data 5      | 08   | +Host Data 10  |
      | 09   | +Host Data 4      | 10   | +Host Data 11  |
      | 11   | +Host Data 3      | 12   | +Host Data 12  |
      | 13   | +Host Data 2      | 14   | +Host Data 13  |
      | 15   | +Host Data 1      | 16   | +Host Data 14  |
      | 17   | +Host Data 0      | 18   | +Host Data 15  |
      | 19   |  Gnd              | 20   |  Key           |
      | 21   | +DREQ             | 22   |  Gnd           |
      | 23   | -Host IOW         | 24   |  Gnd           |
      | 25   | -Host IOR         | 26   |  Gnd           |
      | 27   | -IOCHRDY          | 28   |  Not Connected |
      | 29   | -DACK             | 30   |  Gnd           |
      | 31   | +Host IRQ         | 32   | -Host IOCS16   |
      | 33   | +Host Address 1   | 34   | -Host PDIAG    |
      | 35   | +Host Address 0   | 36   | +Host Address 2|
      | 37   | -Host CS0         | 38   | -Host CS1      |
      | 39   | -Host Active/Slave| 40   |  Gnd           |
      | 41   | +5 Volt Logic     | 42   | +5 Volt Motor  |
      | 43   |  Gnd              | 44   | +AT  -XT       |
      +------+-------------------+------+----------------+

 Cabling
 -------
 All 2.5 inch AT/IDE interface drives use a 44 pin male connector that
 incorporates power, control, and data signals. This configurations
 differs from the 3.5 inch IDE drives which employ a 40 pin signal
 connector and separate 4 pin power connector. Therefore, if you are
 replacing an existing 3.5 inch drive and are faced with a 40 pin
 connector, you will need an adapter card, such as the one shown
 below. If your computer is a laptop, a 44 pin connector should be
 mounted on the motherboard.

 Since power and ground are present at the interface connector, damage
 could be induced by offset or upside down connection. Please ensure
 that pin 20 of your system's female connector is properly keyed.

    Adapter Board
    -------------

                    GND +5VDC
                 +----+-++
                 |O O O O|
     ++          +-----+-+
     |+- Pin 44        |         ++
     |+----------------+  +------++ Pin 40
     |+-------------------++-----++
     |+--------------------++----++
     |+---------------------++---++
     |+----------------------+
                                 ||
     ||                          ||
     |+-----------------------+
     ++Pin 1                  +--++ Pin 1
                                 ++


 Functional Description
 ----------------------
 The A130/260 contains all necessary mechanical and electronic parts
 to interpret control signals, position the heads, read and write
 data, and provide a contaminant free environment for the heads and
 disks.


 Air Filtration System
 ---------------------
 Inside the HDA, air is recirculated through a .3 micron filter,
 providing a clean environment for the recording heads and disks.


 Drive Mechanism
 ---------------
 A brushless DC motor rotates the spindle at 2981 RPM. Back EMF of the
 motor is used to quickly stop the spindle when power is removed.


 Read/Write Heads and Disks
 --------------------------
 Data is recorded on a single 65 mm diameter glass disk using two 3370
 type thin film heads.



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
AREAL    A-130/A-260  TECHNICAL MANUAL REV. 2.0, JULY 1, 1993

 Introduction
 ------------
 Areal Models A130 and A260 are 2.5 inch, high capacity, ruggedized,
 high performance, low power, low profile disk drives. By design,
 they are ideal for notebook, laptop, or portable applications.

 Both incorporate the IBM PC-AT/XT Task File control logic and
 requires only chip select decode logic to allow bus connection. This
 logic is typically embedded in your computer motherboard.


 Key Features
 ------------

 - Automatic Microprocessor Controlled Diagnostics

 - Buffer Size 32 KB or 64 KB

 - Embedded Servo System with DSP Control

 - Extremely Low Power Requirement

 - Internal Air Filtration System

 - Lightweight at Less than 5 Ounces

 - Programmable Low Power Modes

 - Reed Solomon "Correction on the Fly"

 - Soft "Constant Density" Recording Method

 - 100 G Non-Operation Shock Tolerance


 Error Correction
 ----------------
 The A130/260 employs a 88 bit ECC polynomial for Data Field error
 detection and correction, plus a 16 bit CRC code for ID Field error
 detection. One 31 bit burst or two 11 bit bursts can be corrected on
 the fly.


 Seek Time
 ---------
       +----------------------------------+--------+
       |Track-to-Track         msec. typ. |   3    |
       +----------------------------------+--------+
       |Average                msec. typ. |  15    |
       |                       msec. max. |  22    |
       +----------------------------------+--------+
       |Latency                msec. avg. |  10.1  |
       +----------------------------------+--------+


 Formatting
 ----------
 Once the drive has been partitioned, DOS requires that it be format-
 ted. Formatting checks for defective sectors (and deallocates them if
 necessary) and builds the FAT (file allocation table). Make sure to
 use the "/s" option so that your hard drive will be bootable.

 Example: type "FORMAT C:/S". Format will only recognize hard drives
 that have valid DOS partitions, therefore FDISK must precede
 formatting.

 If an "Invalid Drive Specification" error is reported, the drive has
 not successfully been partitioned. Please run FDISK once more.


 Setup Table Alteration
 ----------------------
 Whenever a peripheral device is changed or assed, your computer's
 CMOS table may require modification. This table is typically
 accessed at power on by pressing the "Del" key, or by running the
 "Setup" program.

 Once inside this setup program, you will be prompted for various
 parameters, but only need to specify the number of heads, sectors,
 and cylinders. Other variables such as write current, landing zone,
 etc., are determined by Areal engineering during the design phase
 and are hard coded into the drive. The A130 is most efficient when
 specified as a 5 head, 60 sector, 856 cylinder device. These exact
 parameters may not be available as an existing drive type. If this
 is the case, please locate the user definable BIOS entry (typically
 47 or 48) and enter the parameter listed above. From these
 parameters, you can calculate total capacity of the A260 for example
 as 856 x 10 x 60 x 512 = 262,963,200 bytes, however, even on a
 freshly formatted disk this total capacity cannot be used by the
 user, since some data space is used by DOS for FAT tables, directory
 space, etc.

 Most programs report capacity in this '262 million byte' format,
 however, some programs such as FDISK still use the old standard of
 'megabytes'. In the megabyte measurement, total byte capacity is
 devided by 1.024 x 1.024, reducing the reported capacity to 250.781
 megabytes.


