
                             PS PAK
                         SPECIFICATIONS

Performance Advantage Kits
  Easily installed and fully featured 5 1/4 inch, high performance
  St-506 and ESDI disk drives for IBM PS/2 Models 60 and 80

The PS PAK Performance Advantage Kits offer:
  Low cost per megabyte
  High performance; high reliability
  Convenient, easy to install hardware package
  Wide range of capacities available
  Upward growth path to 765 MBytes
  All hardware and software included
Available in six formatted capacities:

  PC PAK Model           Interface           Formatted Capacities
  ------------           ---------           --------------------
     1333A                ST-506                   75 MBytes
     1335                 ST-506                   94 MBytes
     1353A                 ESDI                   113 MBytes
     1354A                 ESDI                   131 MBytes
     1355                  ESDI                   150 MBytes
     1558-15               ESDI                   337 MBytes

Each PS PAK includes

  ST-506 or ESDI interface drive
  The following table is for reference:
  IBM PS/2 Model     Standard IBM Drive     Micropolis Compatible 
  ---------------------------------------------------------------
      60-041             44 MB ST-506               1333A
      80-041             71 MB ST-506                1335
  ---------------------------------------------------------------
      60-071               71 MB ESDI               1353A
      80-071                                        1354A
                                                     1355
                                                  1558-15
  ---------------------------------------------------------------
      60-111              115 MB ESDI               1353A
      80-111                                        1354A
                                                     1355
                                                  1558-15
  ---------------------------------------------------------------
      60-311              314 MB ESDI               1353A
      80-311                                        1354A
                                                     1355
                                                  1558-15
  ---------------------------------------------------------------
  Cables and mounting hardware
  Complete, easy to follow installation guide
  Installation/partitioning software

  All this backed by a full one-year warranty
  For more information on this and other Micropolis disk drive,  
  contact a Micropolis Sales Office for your nearest Authorized  
  Distributor.
                                Model Number
Formatted Capacity:          1333A                  1335

  Total Mbytes                  44                    71         
  Byte Per Sector       ------------------- 512 -----------------
  Sectors Per Track     -------------------- 17 -----------------
  Cylinders             ------------------ 1024 -----------------
  Data Heads                     5                     8        

Formatted Capacity:               Model Number

  Model                 1353A      1354A      1355        1558-15
  Total Mbytes             94        131       150            337
  Bytes Per Sector      ------------ 512 ---------------      512
  Sectors Per Track     ------------- 36 ---------------       36
  Cylinders             ----------- 1022 ---------------     1222
  Data Heads                5          7         8             15

1330 Performance

  Seek Time (including settling time)     Track-to-Track   6 msec
                                          Average         28 msec
                                          Maximum         62 msec
  Average Rotational Latency                            8.33 msec
  Rotational Speed                              3600 rpm +/- 0.5%
  Data Transfer Rate                                  5 Mbits/sec

1350 Performance

  Seek Time (including settling time)     Track-to-Track   5 msec
                                          Average         23 msec
                                          Maximum         50 msec
  Latency Time (Average)                                8.33 msec
  Rotational Speed                                       3600 rpm
  Data Transfer Rate                                 10 Mbits/sec

1550 Performance

  Seek Time (including settling time)     Track-to-Track   4 msec
                                          Average         18 msec
                                          Maximum         40 msec
  Latency Time(average)                                 8.33 msec
  Rotational Speed                                       3600 rpm
  Data Transfer Rate                                 10 Mbits/sec

1330 Interface
  Data Transfer Rate                                  5 Mbits/sec
  Code                        (Modified Frequency Modulation) MFM

Features
  ST-506/412 Interface
  Soft-Sectoring

1350/1550 Interface Features

  ESDI Serial Mode
  Hard Sectoring
  Servo locked data
  Extensive status and diagnostic information

1330/1350/1550 Physical

  Form Factor      (Industry-standard for 5 1/4 inch full height)
    Height                                   3.25 inches(82.6 mm)
    Width                                     5.75 inches(146 mm)
    Depth                                     8.00 inches(203 mm)
  Weight
    1330/1350                            6 pounds(2.7 kg) nominal
    1550                               8.4 pounds(3.8 kg) nominal

Power Requirements

  1330
    +12V +/-5%                                           2.0A avg
                                       (3.9A max during start-up)
    +5V +/-5%                                            0.9A avg
    Power dissipation, typical                           29 Watts
  1350
    +12V +/-5%                                           2.0A Avg
                                      (4.3A max. during start-up)
    +5V +/-5%                                            2.2A Avg
    Power Dissipation,typical                            32 Watts
  1550
    +12V +/-5%                                           2.0A Avg
                                      (4.3A max. during start-up)
    +5V +/-5%                                            1.5A Avg
    Power Dissipation-typical                            29 Watts

OTHER

  Acoustic Noise                                         < 51 dBA
  Mounting standard 5 1/4 inch disk drive,any orientation

1330/1350/1550 Reliability
  MTBF
    1330                                      25,000 power-on hrs
    1350                                      30,000 power-on hrs
    1550                                     150,000 power-on hrs
  MTTR                                                     15 min
  Preventive Maintenance                                     none
  Electronic Adjustments                                     none
  Error Rates
    Soft Errors
      1330                               <= 10 in 10^10 bits read
      1350/1550                          <= 10 in 10^10 bits read
    Hard Errors
      1330                               <= 10 in 10^12 bits read
      1350/1550                          <= 10 in 10^13 bits read
    Seek Errors
      1330                                    <= 10 in 10^6 seeks
      1350/1500                               <= 10 in 10^7 seeks

   