
A - 3 4 0 A T   ( O L D )    AREAL
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 2.5"/SUPERSLIMLINE    Cylinders    1501| 1020|     |
Capacity form/unform   395/      MB        Heads           6|   12|     |
Seek time   / track  15.0/ 3.0 ms          Sector/track     |   63|     |
Controller           IDE / AT              Precompensation
Cache/Buffer           128 KB LOOK-AHEAD   Landing Zone
Data transfer rate    2.500 MB/S int       Bytes/Sector      512
                     11.000 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               W     Shock        g        10       |    100
       seek           2.3 W     Rotation   RPM      3600
       read/write     2.8 W     Acoustic   dBA        35
       spin-up        6.0 W     ECC        Bit   88,REED SOLOMON
                                MTBF         h     100000
                                Warranty Month        24
Lift/Lock/Park     YES          Certificates     CSA,TUV,UL1950               

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                        L   A   Y   O   U   T
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AREAL    A340/A525XT/AT  TECHNICAL MANUAL REV. 1, 01.11.1993

  +---------------------------------------------------------+
  |                                                         |
  |                                                         |XX44
  |                                                         |XX
  |         PCBA SIDE                                       |XX I
  |                                                         |XX N
  |                                                         |XX T
  |                                                         |XX E
  |                                                         |X* R
  |                                                         |XX F
  |                                                         |XX A
  |                                                         |XX C
  |                                                         |XX E
  |                                                         |XX
  |                                                         |XX
  |                                                         |  2
  |                                                         |XXJP1
  |                                                         |XX50
  +---------------------------------------------------------+



**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
AREAL    A340/525AT/XT  TECHNICAL MANUAL REV. 1, 01.11.1993

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

 x = Factory default configuration


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

   OPEN    Master x
   CLOSED  Slave



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                      I   N   S   T   A   L   L
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AREAL    A340/525AT/XT  TECHNICAL MANUAL REV. 1, 01.11.1993

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

 Recommended Mounting Configuration
 ----------------------------------

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

 This 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).



 Cabling
 -------
 All 2.5 inch AT/IDE interface drives use a 44 pin male connector that
 incorporates power, control, and data signals. This configuration
 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 disk drive and are faced with a 40 pin
 connector, you will need an adapter card. If your computer was de-
 signed for 2.5" hard drives, there will be a 44 pin connection 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
                                 ++


 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    |150250-5222TH|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   | Not Connected     | 22   |  Gnd           |
      +------+-------------------+------+----------------+
      | 23   | -Host IOW         | 24   |  Gnd           |
      +------+-------------------+------+----------------+
      | 25   | -Host IOR         | 26   |  Gnd           |
      +------+-------------------+------+----------------+
      | 27   | -IOCHRDY          | 28   |  Not Connected |
      +------+-------------------+------+----------------+
      | 29   | Not Used          | 30   |  Gnd           |
      +------+-------------------+------+----------------+
      | 31   | +Host IRQ         | 32   | -Host IO16     |
      +------+-------------------+------+----------------+
      | 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       |
      +------+-------------------+------+----------------+
      | 45   |  NO PIN           | 46   | NO PIN         |
      +------+-------------------+------+----------------+
      | 47   |  Master/Slave     | 48   | Master/Slave   |
      +------+-------------------+------+----------------+
      | 49   |  Not Used         | 50   | Not Used       |
      +------+-------------------+------+----------------+

 Signal +AT/-XT: Selectable for AT or XT use. High = AT. This line
 is internally pulled up.


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



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                      F   E   A   T   U   R   E  S
**********************************************************************
AREAL    A340/525AT/XT  TECHNICAL MANUAL REV. 1, 01.11.1993


 Functional Description
 ----------------------
 The A340/A525 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.


 Drive Mechanism
 ---------------
 A brushless DC motor rotates the spindle at 3600 RPM. Back EMF of the
 motor is used to quickly stop the spindle when power is removed.


 Error Correction
 ----------------
 The A340/A525 employs an 88 bit Reed Solomon polynominal 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 burst can be
 corrected on the fly.


 Head Positioner Mechanism
 -------------------------
 The read/write heads are positioned by a rotary voice coil actuator
 which employs DSP control to ensure seek accuracy.


 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 A340 is most efficient when
 specified as a 12 head, 63 sector, 1020 cylinder device. The A525
 is most efficient when specified as a 16 head, 63 sector, 1020
 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 A525 for example as 1020 x 16 x 63 x 512 =
 526,417,920 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 '526 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 502.031
 megabytes.


 Seek Time
 ---------
       +----------------------------------+--------+
       |                                  |A340/525|
       +----------------------------------+--------+
       |Track-to-Track         msec. typ. |   3    |
       +----------------------------------+--------+
       |Average                msec. typ. |  15.0  |
       |                       msec. max. |  22    |
       +----------------------------------+--------+
       |Latency                msec. avg. |   8.33 |
       +----------------------------------+--------+


 NOTE
 This Technical Manual describes all physical and electrical
 characteristices necessary to utilize the A340 or A525 in AT mode.


 Error Reporting
 ---------------
 When the drive receives a command from the Host, it checks for
 validity of the command, and with the exception of the Initialize
 Drive Parameters command, also checks register values for valid
 range. If the values are invalid, the drive does not execute the
 command, but instead posts the "ERR" bit in the Status register and
 the "ABRT" bit in the Error register.

 If a data error occurs during command execution, the command is
 terminated immediately. Valid errors are listed in the following
 table:

 -----------------+--------------------------+---------------------+
 COMMAND          |ERROR REGISTER            |STATUS REGISTER      |
                  +---------------------+----+---------------------+
                  |BBK|UNC|IDNF|ABRT|TK0|AMNF|DRDY|DSC|DWF|CORR|ERR|
 -----------------+---+---+----+----+---+----+----+---+---+----+---+
 Exec. Drive Diag.|   |   |    | V  |   |    |    |   |   |    | V |
 Format Track     |   |   | V  | V  |   |    | V  | V | V |    | V |
 Identify Drive   |   |   |    | V  |   |    | V  | V | V |    | V |
 Initi. Parameters|   |   |    | V  |   |    |    |   |   |    | V |
 Power Commands   |   |   |    | V  |   |    |    |   |   |    | V |
 Recalibrate      |   |   |    | V  | V |    | V  | V | V |    | V |
 Read/Write Buffer|   |   |    | V  |   |    |    |   |   |    | V |
 Read Long        | V |   | V  | V  |   | V  | V  | V | V |    | V |
 Read Multiple    | V | V | V  | V  |   | V  | V  | V | V | V  | V |
 Read Sectors     | V | V | V  | V  |   | V  | V  | V | V | V  | V |
 Read Verify Sec. | V | V | V  | V  |   | V  | V  | V | V | V  | V |
 Seek             |   |   | V  | V  |   |    | V  | V | V |    | V |
 Set Multiple     |   |   |    | V  |   |    | V  | V | V |    | V |
 Write Long       | V |   | V  | V  |   |    | V  | V | V |    | V |
 Write Multiple   | V |   | V  | V  |   |    | V  | V | V |    | V |
 Write Sectors    | V |   | V  | V  |   |    | V  | V | V |    | V |
 Write Verify     | V | V | V  | V  |   |    | V  | V | V | V  | V |
 -----------------+---+---+----+----+---+----+----+---+---+----+---+

 Key:
 V     = Valid errors for each command
 ABRT  = Command aborted
 BBK   = Bad block detected
 CORR  = Data error corrected by ECC
 DRDY  = Drive not ready
 DSC   = Disk seek complete not detected
 DWF   = Drive write fault detected
 ERR   = Error detected
 IDNF  = ID mark not found
 TK0   = Track zero not found error
 UNC   = Uncorrectable data error
 AMNF  = Address mark not found


