
0 6 6 4 - E S H    IBM
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    2857|     |     |
Capacity form/unform  4027/ 4989 MB        Heads            |     |     |
Seek time   / track   9.8/ 1.5 ms          Sector/track  188|     |     |
Controller           SCSI2 SI/WIDE         Precompensation
Cache/Buffer          1024 KB DUAL-PORTED  Landing Zone
Data transfer rate    5.220 MB/S int       Bytes/Sector      512
                     20.000 MB/S ext SYNC
Recording method     PRML 8/9                       operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 50    |    -40 60
Power: sleep              W     Humidity     %         8 80    |      5 99
       standby            W     Altitude    km    -0.305  3.048| -0.305  9.144
       idle          25.0 W     Shock        g        10       |     35
       seek          29.0 W     Rotation   RPM      5400
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit   ON THE FLY,REED SOLOMON
                                MTBF         h     375000
                                Warranty Month        60
Lift/Lock/Park     YES          Certificates     CSA,FCC,IEC380,IEC435,IEC9...

**********************************************************************
                        L   A   Y   O   U   T
**********************************************************************
IBM      0664-ESH  HARDWARE SPECIFICATION AS02-0012-02, 8/19/91




  +---------------------------------------------------------------+
  |                                                               |
  |                                                               |
  |                                                               |
  |   Rear View                                                   |
  |                                                               |
  |                                                               |
  | Option Block +--------------------------------------1+-----+  |
  | +----------1 | 68-pin SCSI Connector                ||XXXXX|  |
  | +----------+ +--------------------------------------+1-----+  |
  |                                                       Power   |
  +---------------------------------------------------------------+






**********************************************************************
                      J   U   M   P   E   R   S
**********************************************************************
IBM      0664-ESH  HARDWARE SPECIFICATION AS02-0012-02, 8/19/1991

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

 Option Block Layout
 -------------------
 The Allicat S20 drive with a 68 pin SCSI connector contains a 2x11
 option block, which controls the following functions.

 - Target SCSI address (0-15)
 - Automatic motor start
 - Whether or not the target supplies SCSI termination power
 - Write protect


    +-------------------------------- ADDRESS BIT 0/-MFG RESET
    |  +----------------------------- ADDRESS BIT 1
    |  |  +-------------------------- ADDRESS BIT 2/MFG INPUT
    |  |  |  +----------------------- ADDRESS BIT 3
    |  |  |  |  +-------------------- -AUTO START
    |  |  |  |  |  +----------------- BLANK POLARITY
    |  |  |  |  |  |  +-------------- N/C
    |  |  |  |  |  |  |  +----------- FUSED TERMPWR
    |  |  |  |  |  |  |  |  +-------- +LED
    |  |  |  |  |  |  |  |  |  +----- MFG Output
    |  |  |  |  |  |  |  |  |  |  +-- Write Protect WP
   ++--+--+--+--+--+--+--+--+--+--++
   |o  o  o  o  o     o  o  o  o  1|
   |22 o  o  o  o  o  o  o  o  o  o|
   ++--+--+--+--+--+--+--+--+--+--++
    +--+--+--+--+  ++-+  |  |  |  +-- GND
          |         |    |  |  +----- MFG TP
          |         |    |  +-------- -LED
          |         |    +----------- SCSI TERMPWR
          |         +---------------- N/C
          +-------------------------- GROUND

 NOTE
 All signal option lines can be driven from one ground line but the
 ground pins should only be used for driving option lines.

 NOTE
 The +/-LED signals are intended to directly connect to the two wires
 of an LED (Ligth Emitting Diode).

 NOTE
 The reserved address lines are used to retain compatibility with
 earlier products.


 Option Block Pin Descriptions
 -----------------------------
 +---+-------+--------------+------+---------------------------------+
 |Pin|Related|Pin Name      |Direc-|Pin Description                  |
 | # |Ground |              |ion   |                                 |
 |   |Pin    |              |      |                                 |
 +---+-------+--------------+------+---------------------------------+
 | 21| 22    |-Address Bit 0| In   |LSB of SCSI Address              |
 +---+-------+--------------+------+---------------------------------+
 | 19| 20    |-Address Bit 1| In   |SCSI Address                     |
 +---+-------+--------------+------+---------------------------------+
 | 17| 18    |-Address Bit 2| In   |SCSI Address                     |
 +---+-------+--------------+------+---------------------------------+
 | 15| 16    |-Address Bit 3| In   |MSB of SCSI Address              |
 +---+-------+--------------+------+---------------------------------+
 | 13| 14    |-Auto Start   | In   |If this pin is shunted to ground,|
 |   |       |              |      |then the drive will automatically|
 |   |       |              |      |start the motor. If this pin is  |
 |   |       |              |      |not shunted, then the motor will |
 |   |       |              |      |not start until the receipt of   |
 |   |       |              |      |the Start/Stop Unit SCSI Command.|
 +---+-------+--------------+------+---------------------------------+
 | 12| N/A   |N/A           | N/A  |N/A                              |
 +---+-------+--------------+------+---------------------------------+
 | 11| N/A   |Blank Polarity| N/A  |This pin position is used as a   |
 |   |       |              |      |polarity pin, and should be      |
 |   |       |              |      |filled.                          |
 +---+-------+--------------+------+---------------------------------+
 |  8| N/A   |SCSI Target   | N/A  |This pin connects to the         |
 |   |       |TermPwr       |      |appropriate pins on the device   |
 |   |       |              |      |SCSI connector to supply TermPwr |
 |   |       |              |      |for the SCSI bus. When shunted   |
 |   |       |              |      |to Fused Target TermPwr          |
 |   |       |              |      |sufficient current is supplied by|
 |   |       |              |      |the Target to terminate the SCSI |
 |   |       |              |      |bus by some termination scheme   |
 |   |       |              |      |outside the Target.              |
 +---+-------+--------------+------+---------------------------------+
 |  7| N/A   |Fused Target  | N/A  |This pin connects to a fused     |
 |   |       |TermPwr       |      |voltage source used to supply    |
 |   |       |              |      |SCSI TermPwr to the device SCSI  |
 |   |       |              |      |connector when the shunt to SCSI |
 |   |       |              |      |Target TermPwr is in place.      |
 +---+-------+--------------+------+---------------------------------+
 |  6| N/A   |LED Cathode   | N/A  |Ground side of LED               |
 +---+-------+--------------+------+---------------------------------+
 |  5| N/A   |LED Anode     | N/A  |+5VDC side of LED                |
 +---+-------+--------------+------+---------------------------------+
 |  4| N/A   |N/A           | N/A  |N/A                              |
 +---+-------+--------------+------+---------------------------------+
 |  3| N/A   |N/A           | N/A  |N/A                              |
 +---+-------+--------------+------+---------------------------------+
 |  1| 2     |Write Protect | In   |Inhibits customer data writes.   |
 +---+-------+--------------+------+---------------------------------+


 SCSI Target Address
 -------------------
 Any changes to the address portion of the option block will not be
 recognized except during a power on and after a reset, when the
 address bits are sensed.
   +----------+-------------------------------+
   | SCSI ID  |       Jumper Location         |
   |          |             PINS              |
   |          | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
   +----------+-------+-------+-------+-------+
   |    0     | OPEN  | OPEN  | OPEN  | OPEN  |
   |    1     | OPEN  | OPEN  | OPEN  | CLOSED|
   |    2     | OPEN  | OPEN  | CLOSED| OPEN  |
   |    3     | OPEN  | OPEN  | CLOSED| CLOSED|
   |    4     | OPEN  | CLOSED| OPEN  | OPEN  |
   |    5     | OPEN  | CLOSED| OPEN  | CLOSED|
   |    6     | OPEN  | CLOSED| CLOSED| OPEN  |
   |    7     | OPEN  | CLOSED| CLOSED| CLOSED|
   |    8     | CLOSED| OPEN  | OPEN  | OPEN  |
   |    9     | CLOSED| OPEN  | OPEN  | CLOSED|
   |   10     | CLOSED| OPEN  | CLOSED| OPEN  |
   |   11     | CLOSED| OPEN  | CLOSED| CLOSED|
   |   12     | CLOSED| CLOSED| OPEN  | OPEN  |
   |   13     | CLOSED| CLOSED| OPEN  | CLOSED|
   |   14     | CLOSED| CLOSED| CLOSED| OPEN  |
   |   15     | CLOSED| CLOSED| CLOSED| CLOSED|
   +----------+-------+-------+-------+-------+


 Auto Start
 ----------
 The -Auto Start signal will be used to determine if the spindles
 should be powered on following a power on or reset condition. Without
 the shunt in place, the spindles can only be spun up by SCSI command.


 Target SCSI Termination Power
 -----------------------------
 The Target TermPwr shunt will directly connect a fused voltage supply
 of termination power to the appropriate pins on the SCSI connector.
 This indication cannot be sensed by the initiator.


 Write Protect
 -------------
 The Write Protect feature allows the customer to insure that no
 customer data will be overwritten via SCSI command. The feature is
 controlled by a jumper on the Allicat S20 option block. The status
 of the jumper can be sensed via the MODE SENSE command, page 0
 (Vendor Unique), byte 9.

 If the Write Protect jumper is in place, the drive will generate a
 Condition Check Status for the following commands.

 - Write (6) command 0Ah
 - Write (10) command 2Ah
 - Write and Verify command 2Eh
 - Write Long command 2Eh
 - Reassign Blocks 07h
 - Format Unit 04h
 - Sync Cache 35h

 The sense data will show a sense key of Data Protect (7h) with a
 sense code and data of Write Protected (2700h). Although customer
 data will not be written, the drives reserved area will be updated
 with data such as mode select data, error logs, microcode loads, etc.


 SCSI Bus Termination Power
 --------------------------
 Termination power is optionally provided for systems that desire to
 use it. In order to use the Allicat S20 termination power, the user
 needs to install a jumper between pins 07 and 08 of the Option block.
 The jumper only needs to be installed on the last device on the SCSI
 bus (i.e. the file that is physically closest to the terminator).
 Allicat S20 can source up to 2.0 Amps of current at 5.0 Volts ( 5%)
 for termination power.



**********************************************************************
                      I   N   S   T   A   L   L
**********************************************************************
IBM      0664-CSH/ESH  HARDWARE SPECIFICATION AS02-0012-02, 8/19/91

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

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

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


 Mounting
 --------
 The drive can be mounted with any surface facing down as listed
 below.

 - Bottom Side Down
 - Top Side Down
 - Right Side Down
 - Left Side Down
 - Rear Side Down
 - Front Side Down

 Four mounting holes are provided on the bottom of the drive, and two
 mounting holes are provided on each side of the drive.

 The torque applied to the mounting screws must be 1.0 Newton-meters
   0.1 Newton-meters.

 The maximum screw penetration is 7.5 millimeters.


 Clearances
 ----------
 The Allicat S20 drive contains all sway space internal to the form
 factor. Therefore, no sway space clearance is required. However,
 adequate clearance is required around the drive to assure the airflow
 needed to maintain component temperatures.


 Power Connector
 ---------------
 The DC power connector is designed to mate with AMP part 1-480424-0
 using AMP pins part 350078-4 (strip) or part 61173-4 (loose piece),
 or their equivalent.

   +------------+   pin 1    +12 VDC
   | 1  2  3  4 |   pin 2    +12 Volts Return
   +------------+   pin 3    + 5 Volts Return
                    pin 4    + 5 VDC


 50-Pin SCSI Bus Connector
 -------------------------
 The SCSI signal connector is a 50-pin connector, MOLEX p/n 70247
 (right angle) meeting ANSI/SCSI specification.


 68-Pin SCSI Bus Connector
 -------------------------
 The SCSI signal connector is a 68-pin connector HONDA part number
 PCS-XE68SLFDUNG1-HSU2 meeting ANSI/SCSI specifications.


 Compatibility of 50 Pin and 68 Pin SCSI Connectors
 --------------------------------------------------
 Note that the "P" connector is not compatible with the 50-pin "A"
 connector as defined in the ANSI/SCSI-2 standard. Therefore system
 cables used with 50 pin products cannot be plugged directly into the
 Allicat S20 68 pin models.

 Despite the difference in connector, the Allicat S20 68 pin models
 are electrically compatible with Allicat S20 50 pin models and other
 50 pin single ended SCSI products and therefore can coexist on the
 same bus. In order to do so, the difference in connector types would
 need to be accounted for in the cable.


 Single Ended SCSI Cable
 -----------------------
 The Allicat S20 disk drive uses single ended drivers and receivers
 which will permit cable lengths of up to 6 meters (19.68 feet). It
 should be noted however that users who plan to use Allicat S20 in
 fast mode should follow all of the SCSI-3 guidelines for single ended
 fast operations. This may include a cable length of less than 6
 meters.

 The SCSI-2 standard states that the total stub of the cable must not
 exceed 0.1 meters. This drive has a maximum internal stub length of
 0.082 meters on all SCSI signals. To remain compliant with ANSI, the
 SCSI bus cable must not add more than 0.018 meters addtional stub
 length to all SCSI signals.


 Single-Ended SCSI Bus Termination
 ---------------------------------
 Allicat S20 has no internal SCSI bus terminators. The system is
 responsible for properly terminating the SCSI bus. A regulated 110
 Ohm terminator is recommended for reliable fast operations (i.e.
 transfer speeds greater than 5MB transfer/sec.). Split resistor or
 regulated terminations may be used for systems that do not plan data
 transfers. Some of the terminator possibilities for Allicat S20 are
 listed in the following table.
 +---------------+--------------------------+------------------------+
 |Data Transfer  | 50 Pin Model Terminators |68 Pin Model Terminators|
 |Rates          |                          |                        |
 +---------------+--------------------------+------------------------+
 |less than 5M   | AMP 88-4163-081-1        |Data Mate DM2050-02-68S |
 |transfers/sec  | Data Mate DM500-06-0     |Data Mate DM2050-02-68R |
 |               | Data Mate DM500-06-R     |                        |
 +---------------+--------------------------+------------------------+
 |more than 5M   | Data Mate DM500-06-R     |Data Mate DM2050-02-68R |
 |transfers/sec  |                          |                        |
 +---------------+--------------------------+------------------------+


 SCSI Bus Termination Power
 --------------------------
 Termination power is optionally provided for systems that desire to
 use it. In order to use the Allicat S20 termination power, the user
 needs to install a jumper between pins 07 and 08 of the Option block.
 The jumper only needs to be installed on the last device on the SCSI
 bus (i.e. the file that is physically closest to the terminator).
 Allicat S20 can source up to 2.0 Amps of current at 5.0 Volts ( 5%)
 for termination power.


 Single Ended SCSI Bus Recommendations For Noise Reduction
 ---------------------------------------------------------
 The SCSI commitee has spent a large amount of resource looking into
 what needs to be done to assure SCSI devices will work as specified
 in the SCSI-2 standard. As a result of this, the committee is
 recommending what is being called the 123 approach to reducing noise
 problems. This approach is:

 1. Use the regulated 110 ohm terminator
 2. Use AWG 28 polyolefin shielded cables
 3. Make sure data and parity are on the outer ring of the cable and
    that REQ and ACK are in the core of the cable.


 Single Ended SCSI Bus Electrical Characteristics
 ------------------------------------------------
 The Western Digital WD33C95 SCSI Bus Interface Controller is used in
 this drive.
  +------+--------------------------+---+---+-----+---------------+
  |Symbol|Input Characteristics     |Min|Max|Units|Conditions     |
  +------+--------------------------+---+---+-----+---------------+
  |Vol   |Low level output voltage  |   |0.4| V   |lout = 48.0 mA |
  +------+--------------------------+---+---+-----+---------------+
  |Voh   |High level output voltage |2.5|   | V   |lout = -400  A |
  +------+--------------------------+---+---+-----+---------------+
  |Vil   |Low level input voltage   |0.0|0.8| V   |               |
  +------+--------------------------+---+---+-----+---------------+
  |Vih   |High level input voltage  |2.0|5.5| V   |               |
  +------+--------------------------+---+---+-----+---------------+
  |Iil   |Low level input current   |   |10 |  A  |               |
  +------+--------------------------+---+---+-----+---------------+
  |Iih   |High level input current  |   |50 |  A  |               |
  +------+--------------------------+---+---+-----+---------------+
  |Vihys |Input hysterisis          |0.3|   | V   |               |
  +------+--------------------------+---+---+-----+---------------+
  |Ci    |Input capacitance         |   |25 | pF  |               |
  +------+--------------------------+---+---+-----+---------------+
 NOTE  Ta = 0 to 70 deg. C



**********************************************************************
                      F   E   A   T   U   R   E  S
**********************************************************************
IBM      0664-CSH/-ESH  HARDWARE SPECIFICATION AS02-0012-02 8/19/91


 ECC Implementation
 ------------------
 A Reed-Solomon Error Coreecting Code of degree 5 with 3-way
 interleaving is used to cover the physical blocks. Burst errors of up
 to 6 bytes are detected and corrected properly.


 Seek Time
 ---------
 Single cylinder     0.6 ms (Read)
                     2.5 ms (Write)
 Average (weighted)  9.4 ms (for Read)
                    11.4 ms (for Write)
                     9.8 ms (assumes 4 reads to 1 write)
 Full stroke        18.5 ms (for Read)
                    20.5 ms (for Write)


 Microcode Defect Rate
 ---------------------
 The loadable microcode, (including ROS), defect rate will be less
 than or equal to 0.150 TVUA/KCSI for the 60 month product life.

 TVUA/KCSI refers to the number of valid APARS per 1000 lines of
 microcode. An APAR is the process whereby microcode problems are
 documented, trackes, and resolved.


 Required Testing For Allicat S20 Approval
 -----------------------------------------
 Allicat S20 drive products are only supplied to using systems that
 meet the usage requirements for the drive. General Availability (GA)
 is not granted. Allicat S20 drives receive a Unit LA (Limited
 Availability) and a Unit GA, but system usage is controlled by IBM
 TUC codes. The two TUC codes that are given are: TUC E and TUC C.
 TUC E may be given after unit LA for system testing. This code means
 that testing is incomplete and quantities may/may not be limited. TUC
 C is given after all system tests pass to the satisfaction of the
 system and drive developer and before system First Customer Ship
 (FCS).


