lotus

previous page: Hard Drive: MICROPOLIS: 1557-13 293MB 5.25"/FH   ESDI
  
page up: Hard Drive Specs from MICROPOLIS
  
next page: Hard Drive: MICROPOLIS: 1557-15 323MB 5.25"/FH   ESDI

Hard Drive: MICROPOLIS: 1557-14 310MB 5.25"/FH ESDI




1 5 5 7 - 1 4    MICROPOLIS
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders    1224|     |     |
Capacity form/unform   310/  342 MB        Heads          14|     |     |
Seek time   / track  18.0/ 4.0 ms          Sector/track   36|     |     |
Controller           ESDI                  Precompensation
Cache/Buffer               KB              Landing Zone
Data transfer rate    1.250 MB/S int       Bytes/Sector      512
                            MB/S ext
Recording method     RLL 2/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 50    |    -40 65
Power: sleep              W     Humidity     %        10 90    |     10 90
       standby       29.0 W     Altitude    km    -0.061  3.048| -0.305 15.240
       idle               W     Shock        g         2       |     50
       seek          35.0 W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA        51
       spin-up            W     ECC        Bit   48
                                MTBF         h      30000
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  

Layout

MICROPL. 1550 SERIES PRODUCT DESCRIPTION 104004 REV. A

  +---------------------------------------------------------+
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX J2
  |                                                         |XX
  |                                                         |X1
  |                                                         |
  |                                                         |XX
  |                                                         |XX J1
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                             Terminator  |X1
  |                              OPTION JUMPER    +------+  |
  |                              +++++++++        | RN1  |  |XX Power
  |                            DA3+++++++W1       +------+  |XX J3
  +---------------------------------------------------------+  1

     +--------------------------------------+
     |       +--+J4                         |
     |       +--+                           |
     |                                      |
     |  +--+J5                              |
     |  +--+                                |
     |      J2             J1           J3  |
     |  ........... XXXXXXXXXXXXXXXX XXXXXXX|
     +------------1----------------1-------1+
                                     Power

Jumpers

MICROPL. 1550 SERIES PRODUCT DESCRIPTION 104004 REV. A

Jumper setting
==============

x = Jumper set at factory

 OPTION JUMPER
 -------------
   +------------------------+
   | o  o  o  o  o  o  o  o |
   | o  o  o  o  o  o  o  o |
   +-+--+--+--+--+--+--+--+-+
     |  |  |  |  |  |  |  +---- DA3 +
     |  |  |  |  |  |  +------- DA2 +-- Drive Select
     |  |  |  |  |  +---------- DA1 +
     |  |  |  |  +------------- W5 ---- Spindle Control Option
     |  |  |  +---------------- W4 +
     |  |  +------------------- W3 +--- Default Sector Configuration
     |  +---------------------- W2 +
     +------------------------- W1 ---- Hard/Soft Sector Option

 Drive Select  DA3/DA2/DA1
 -------------------------
  +--------+------------------------+
  |Drive   |    Select Jumpers      |
  |Address |   DA3   |DA2   |DA1    |
  +--------+---------+------+-------+
  |x 1     |   OPEN  |OPEN  |CLOSED |
  +--------+---------+------+-------+
  |  2     |   OPEN  |CLOSED|OPEN   |
  +--------+---------+------+-------+
  |  3     |   OPEN  |CLOSED|CLOSED |
  +--------+---------+------+-------+
  |  4     |   CLOSED|OPEN  |OPEN   |
  +--------+---------+------+-------+
  |  5     |   CLOSED|OPEN  |CLOSED |
  +--------+---------+------+-------+
  |  6     |   CLOSED|CLOSED|OPEN   |
  +--------+---------+------+-------+
  |  7     |   CLOSED|CLOSED|CLOSED |
  +--------+---------+------+-------+

Drive Address 0 is used as a "deselect" (i.e., no drive is selected).

The three Drive Select interface lines are decoded to select the
correspondingly addressed drive to the host controller/formatter. In
multiple-drive systems, each drive must have its own unique address.

Terminator Pack RN1 provides proper termination for the interface
lines. When daisy-chaining multiple 1550 drives, the terminator is
installed only in the last drive on the daisy chain.

 W1  Hard- or Soft-sectored mode
 -------------------------------
     CLOSED  The drive is configured to operate in the SOFT SECTOR
             mode. Address mark generation and detection are enabled,
             and the Sector/Address Mark Found interface signal is
             used to report address mark found. Sector size is
             selected by the host controller.
     OPEN    The drive is configured to operate in the HARD SECTOR
             mode. The Sector/Address Mark Found interface signal is
             used to transmit sector pulses to the host controller.
             (Factory default)

 Sector pulses are derived from the servo disk. The number of sector
 pulses generated is equal to:
           +      +
           |20,832|  Where 20,832 = byte clock derived from servo
        INT|------|                 disk
           |   n  |           INT = integer part of
           +      +             n = the number of bytes/sector
                                    (82 minimum)

 W2/W3/W4  Hard Sector Configuration
 -----------------------------------
     +--------+---------------------------+------------------------+
     |Sectors |     Bytes/Sector          |    Jumpers             |
     |        | Formatted | Unformatted   |  W4    | W3    | W2    |
     +--------+-----------+---------------+--------+-------+-------+
     |   35   |    512    |     595       |  OPEN  | OPEN  | OPEN  |
     +--------+-----------+---------------+--------+-------+-------+
     |   36   |    512    |     578       |  OPEN  | OPEN  | CLOSED|
     +--------+-----------+---------------+--------+-------+-------+
     |   19   |   1024    |    1096       |  OPEN  | CLOSED| OPEN  |
     +--------+-----------+---------------+--------+-------+-------+
     |    9   |   2048    |    2314       |  OPEN  | CLOSED| CLOSED|
     +--------+-----------+---------------+--------+-------+-------+
     |    5   |   4096    |    4166       |  CLOSED| OPEN  | OPEN  |
     +--------+-----------+---------------+--------+-------+-------+
     |   32   |    512    |     651       |  CLOSED| OPEN  | CLOSED|
     +--------+-----------+---------------+--------+-------+-------+
     |   64   |    256    |     325       |  CLOSED| CLOSED| OPEN  |
     +--------+-----------+---------------+--------+-------+-------+
     |    1   |  20832    |   20832       |  CLOSED| CLOSED| CLOSED|
     +--------+-----------+---------------+--------+-------+-------+

 W5  Spindle Control Option
 --------------------------
     CLOSED  The drive must wait for a Start Spindle command to start
             the spindle motor.
     OPEN    The drive automatically starts the spindle motor at
             power-on. (Factory default configuration)

 J3   DC Power and pin connector assignments
 -------------------------------------------
      +------------+   pin 1    +12 VDC
      | 1  2  3  4 |   pin 2    +12 Return
      +------------+   pin 3    + 5 Return
                       pin 4    + 5 VDC

J4/J5 Ground Connectors
------------------------
1/4-inch spade lugs J4 and J5 are provided for grounding.

Install

MICROPL. 1550 SERIES PRODUCT DESCRIPTION 104004 REV. A

Notes on installation
=====================

Drive mounting
--------------

     horizontally             vertically
   +-----------------+   +--+             +--+ +------------------+
   |                 |   |  +-----+ +-----+  | |                  | x
   |                 |   |  |     | |     |  | x+----------------+x
 +-+-----------------+-+ |  |     | |     |  | ||x              x||
 +---------------------+ |  |     | |     |  | ||  x          x  ||
                         |  |     | |     |  | ||    x      x    ||
      x           x      |  |     | |     |  | ||      x  x      ||
 +------x------x-------+ |  +-----+ +-----+  | ||       xx       ||
 +-+------x--x-------+-+ +--+             +--+ ||     x    x     ||
   |       xx        |                         ||   x        x   ||
   |     x    x      |                         || x            x ||
   +---x--------x----+                         |x                x|
     x            x                           x++----------------++x

Dimensions and Mounting
-----------------------
Recommended orientation is vertical on either side, or horizontal
with the Device Electronics board down; other mounting orientations
may be used provided the ambient air temperature around the drive is
kept at or below 50*C (122*F).

Inasmuch as the drive frame acts as a heat sink to dissipate heat
from the unit, the enclosure and mounting structure should be
designed to allow natural convection of heat around the HDA and outer
frame. If the enclosure is small or natural convetion is restricted,
a fan may be required.

The 1550 Series uses industry-standard mounting 5 -inch Winchester
disk drives (the same as for 5 -inch flexible disk drives).

Mounting Screws
---------------
2 per side 6-32 UNC-2B x 0.14 deep.
4 on bottom 6-32 UNC-2B x 0.20 deep.

Caution: The length of the mounting screws must be such that the
screws do not penetrate the side mounting holes more than .14
inch and the bottom mounting holes by more than .20 inches. Maximum
torque applied to the screws must not exceed 10 in-lbs.

Control Signal Connector J1
---------------------------
J1 is a 34-pin board-edge connector. The signals on this connector
control the drive and transfer drive status to the host controller.

Recommended Cable: 3M Scotchflex 3365/34
Mating Connector: AMP 88373-3 (key slot between pins 4 and 6)

Data Transfer Connector J2
--------------------------
J2 is a 20-pin board-edge connector. The signals on this connector
contain read or write data.

Recommended Cable: 3M Scotchflex 3365/20
Mating Connector: AMP 88373-6 (key slot between pins 4 and 6)

 DC Power Connector J3
 ---------------------
 J3 is a 4-pin, keyed AMP MATE-N-LOCK Connector. This connector
 supplies DC power (+5V and +12V) to the drive.

 Mating Connector: AMP 1-480424-0
             Pins: AMP 350078-4

Suggested Wire Size: 18 AWG

Ground Connectors J4/J5
-----------------------
1/4-inch spade lugs J4 and J5 are provided for grounding; system
characteristics determine the proper ground connection.

Mating Connector: AMP 62187-1 or equivalent.

Daisy-Chaining the 1550 Drive
------------------------------

   +-HOST-------+                  +---------------+
   | CONTROLLER +--CONTROL---o-----+ J1   Drive #1 |
   |            |  +---------+-----+ J2            |
   |            |  |         |  +--+ J3  J4/J5     |
   |            |  |         |  |  +-------+-------+
   |            |  |         |  |          +-------------+
   |            |  |         |  |  +---------------+     |
   |            |  |         o--+--+ J1   Drive #2 |     |
   |            |  |  +------+--+--+ J2            |     |
   |            |  |  |      |  o--+ J3  J4/J5     |     |
   |            |  |  |      |  |  +-------+-------+     |
   |            |  |  |      |  |          +-------------o
   |            |  |  |      |  |  +---------------+     |
   |            |  |  |      o--+--+ J1   Drive #3 |     |
   |            |  |  |   +--+--+--+ J2            |     |
   |            |  |  |   |  |  o--+ J3  J4/J5     |     |
   |            |  |  |   |  |  |  +-------+-------+     |
   |            +--+  |   |  |  |          +-------------o
   |      DATA  +-----+   |  |  |  +---------------+     |
   |            +---------+  +--+--+ J1   Drive #4 |     |
   |            +---------------+--+ J2       +----+     |
   |            |               o--+ J3  J4/J5|RN1 |     |
   +------------+               |  +-------+--+----+     |
                                |          |             |
       DC VOLTAGES -------------+          |             |
            GROUND ------------------------o-------------+

Interface Terminator RN1 is installed ONLY in the last physical
drive in the control chain.

Connectors J4 and J5 are provided for grounding; system
characteristics determine the proper ground connection.

Up to seven 1550-Series drives may be connected to a single host
controller/formatter. Control signals at J1 are transmitted via
standard, daisy-chain interconnection. Data signals at J2 are
transmitted via radially connected data-transfer lines.

Interface Electrical Characteristics
------------------------------------
The signals at Control Signal Connector J1 control the drive and
transfer drive status to the host controller. The signals are low-
true at the interface, high-true into drivers and out of receivers,
and have the following logic levels:

 True  = 0.0 VDC to 0.4 VDC @ I = -48 milliamps (maximum)
 False = 2.5 VDC to 5.25 VDC @ I = +250 microamps (open collector)

All interface data transfer signals are differential in nature.

Up to seven drives can be connected to one host controller/formatter.
Drive Select 1, 2 and 3 carry the binary-coded addres of the drive to
be selected. The address of the drive is set with drive selection
jumpers DA1, DA2, and DA3 as a binary combination. When the address
is decoded and the decoded value matches the value specified by the
three drive-selection jumpers, that drive is enabled to receive
commands and transmit status. Drive Select 1 is the least significant
bit.

Adjustments and Maintenance
---------------------------
The 1550 Series of drives requires no adjustments or periodic
maintenance. Additionally, no mechanical adjustments are required to
prepare the drives for handling or shipment.

Field-Replaceable Components
----------------------------
The concept of repair by replacement of complete functional
components is utilized in the 1550 Series, resulting in an MTTR of
less than 15 minutes.

Features

MICROPL. 1550 SERIES PRODUCT DESCRIPTION 104004 REV. A

Micropolis 1550 Series high-performance, 5 -inch Winchester Disk
Drives provide OEMs with high-speed, high-capacity, random-access
storage. They are fully compatible with the Serial mode of the
Enhanced Small Device Interface (ESDI) standard and are designed to
meet the needs of diverse applications environments.

Media Defects
-------------
Media defects are physical characteristics of the media which result
in repetitive read errors when a functional drive is operated within
specified operating conditions.

At the time of manufacture, a media test system evaluates every
drive and identifies the location of each media defect. The defects
are logged on a label affixed to the drive. Defective areas are
identified by cylinder, head address, and number of Bytes from Index.
A printout (listing) of the defects is also shipped with each drive.

A defect list is written for each data surface. The list is written
on the corresponding surface in Sector 0 of cylinder 1223 (the
maximum cylinder) and is repeated on cylinder 1215 (the maximum
cylinder minus eight). This redundancy is provided in case a defect
occurs on the maximum cylinder.

Micropolis specifies that all 1550-series disk drives will meet or
surpass the following criteria:

All drives shall have no more than one defect per megabyte of un-
formatted capacity. Additionally, Cylinder 0 shall be defect-free at
the time of shipment.

Head/Disk Assembly
------------------
The Head/Disk Assembly (HDA) consists of a die-cast structure that
contains virtually all the drive's mechanical components. Two die-
cast members create a sealed clean area. Components included in the
clean area are the read/write heads, the magnetic disks, the head
preamplifier, and the rotary positioner. Electrical connection
between the mechanics in the clean area and the electronic circuit
boards is made with flexible circuits.

Air circulates through the clean area by disk rotation-induced flow.
The air is filtered by a 0.3-micron absolute filter. The sealed area
breathes to the outside via a similar filter.

Data Transfer Signals
---------------------
Four pairs of balanced signals are used to transfer data: NRZ Write
Data, NRZ Read Data, Write Data Clock, and Read/Reference Clock.

Seek Time
---------

                                          | 1550   |
        ----------------------------------+--------+
        Track-to-Track         msec. typ. |   4    |
                       Average msec. typ. |  18    |
                               msec. max. |  40    |
        One-Third Stroke       msec. max. |  19    |
        Latency                msec. avg. |   8.33 |
                 Nominal       msec. max. |  16.67 |
        ----------------------------------+--------+













TOP
previous page: Hard Drive: MICROPOLIS: 1557-13 293MB 5.25"/FH   ESDI
  
page up: Hard Drive Specs from MICROPOLIS
  
next page: Hard Drive: MICROPOLIS: 1557-15 323MB 5.25"/FH   ESDI