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Hard Drive: MICROSCIENCE: HH-725 20MB 5.25"/HH MFM ST506




H H - 7 2 5    MICROSCIENCE
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/HH              Cylinders     612|     |     |
Capacity form/unform    20/   25 MB        Heads           4|     |     |
Seek time   / track  80.0/ 3.0 ms          Sector/track   32|     |     |
Controller           MFM / ST506           Precompensation
Cache/Buffer               KB              Landing Zone
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 50    |    -40 60
Power: sleep              W     Humidity     %         8 80    |      8 80
       standby            W     Altitude    km                 |
       idle          11.0 W     Shock        g        10       |     40
       seek               W     Rotation   RPM      3550
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h      14000
                                Warranty Month
Lift/Lock/Park     NO           Certificates     CSA,TUV,UL478                

Layout

MICROSC. HH-725 INSTALLATION MANUAL 290001-000, SEP. 10, 1985

                                                                     |
                                                                     |
  |                                                                  |
  |                                                                  |
  |                                                                  |
  |                           +------------+                         |
  |                           |     SW1    |                         |
  |                           1------------10      +-----------+     |
  +--+                   +---+              +---+  |     J3    | +---+
     |                   |   |              |   |  +-----------+ |
     +------J1-----------+   +---J2---------+   +----------------+

Controller: Adaptec ACB 2010A

Jumpers

MICROSC. HH-725 INSTALLATION MANUAL 290001-000, SEP. 10, 1985

Switch Setting
==============

SW1
---

                +------------------------------+
                |+-++-++-++-++-++-++-++-++-++-+|OFF (0)
                ||x||x||x||x||x||x||x||x||x||x||
                |+-++-++-++-++-++-++-++-++-++-+|ON (1)
                +-1--2--3--4--5--6--7--8--9--10+
 Drive Select 1 --+  |  |  |  +--+--+--+--+   +-- Exerciser
 Drive Select 2 -----+  |  |  Termination
 Drive Select 3 --------+  |
 Drive Select 4 -----------+















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