1 9 3 6 D MICROPOLIS
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 2759| | |
Capacity form/unform 3022/ 3571 MB Heads 21| | |
Seek time / track 13.0/ 2.0 ms Sector/track | | |
Controller SCSI2 DI/FAST Precompensation
Cache/Buffer 256 KB READ-AHEAD Landing Zone
Data transfer rate 4.000 MB/S int Bytes/Sector 512
10.000 MB/S ext SYNC
Recording method RLL operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 10 50 | -40 65
Power: sleep W Humidity % 10 90 | 10 90
standby W Altitude km -0.061 3.048| -0.305 15.240
idle 32.0 W Shock g 3 | 40
seek 34.5 W Rotation RPM 5400
read/write 34.2 W Acoustic dBA 40
spin-up W ECC Bit 64
MTBF h 250000
Warranty Month 60
Lift/Lock/Park YES Certificates
**********************************************************************
L A Y O U T
**********************************************************************
MICROPL. 1936S/D PRODUCT DESCRIPTION 110827 REV. A
+---------------------------------------------------------+
| ++++ |XX
| COMPONENT SIDE W9++W8|XX ID2
| Terminator |XX ID1
| +---RN4------+ |X1 ID0
| +-+-+-+ +------------+ |
| |.|.|.| |XX
| |.|.|.| W12+ |XX J1
| |.|.|.| ++ |XX
| |.|.|.| W1+ |XX
| |.|.|.| W2| |XX
| |.|.|.| ++ |XX
| +++++++ Terminator |XX
| RN1 | +RN3 +---RN5------+ |XX
| RN2 +------------+ |X1
| |
| +W11 |XX J3
| ++ |XX Power
+---------------------------------------------------------+ 1
+--------------------------------------+
| ++J4 |
| ++ |
| ++J5 |
| ++ |
| |
| J2 J1 J3 |
+..........-XXXXXXXXXXXXXXXXXX-XXXXXXXX+
+-Multi---1---Signal---------1--------1+
Power
**********************************************************************
J U M P E R S
**********************************************************************
MICROPL. 1936S/D PRODUCT DESCRIPTION 110827 REV. A
Jumper Setting
==============
x = Jumpers setting at factory
J2 Multi-Function Connector
----------------------------
Bus Parity Check Option-----+ +---------Spindle Control Option
| | +------ID2
Write Protect Option---+ | | | +---ID1
| | | | | ID0
+--+--+--+--+--++-++-+--++-++-++-+-++ +-----
| | | | | |13|11| |07|05|03|01+-+
| | | |18|16|14|12| |08|06|04|02+-+ J1
+--+--+--++-++-+--+--+--+--+--+--+--+ +------
Slave Sync-+ Master
Sync
Note: Pins 2, 4, 6, 8, 10, 12, and 14 are tied to Ground.
Multi-Function Connector J2 Pin Assignments
-------------------------------------------
+---+-------------+----------------+---+------------+---------------+
|Pin| Signal Name |Description |Pin|Signal Name |Description |
+---+-------------+----------------+---+------------+---------------+
| 1 |ID0 |SCSI ID 0 | 2 |GROUND | - |
+---+-------------+----------------+---+------------+---------------+
| 3 |ID1 |SCSI ID 1 | 4 |GROUND | - |
+---+-------------+----------------+---+------------+---------------+
| 5 |ID2 |SCSI ID 2 | 6 |GROUND | - |
+---+-------------+----------------+---+------------+---------------+
| 7 |SPIN0 |Spindle Control | 8 |GROUND | - |
+---+-------------+----------------+---+------------+---------------+
| 9 |Reserved |- |10 |GROUND | - |
+---+-------------+----------------+---+------------+---------------+
|11 |PARITY |Bus Parity Check|12 |GROUND | - |
+---+-------------+----------------+---+------------+---------------+
|13 |WPROT |Write Protect |14 |GROUND | - |
+---+-------------+----------------+---+------------+---------------+
|15 |Not Connected| |16 |MASTER SYNC |Master Spindle |
| | | | | |Synchronization|
+---+-------------+----------------+---+------------+---------------+
|17 |Not Connected| |18 |SLAVE SYNC |Slave Spindle |
| | | | | |Synchronization|
+---+-------------+----------------+---+------------+---------------+
|19 |Not Connected| |20 |Not | |
| | | | |Connected | |
+---+-------------+----------------+---+------------+---------------+
|21 |SELECT_LED |Select LED |22 |Reserved | |
+---+-------------+----------------+---+------------+---------------+
|23 |+5V |+5V Source |24 |SELECT-5V |+5V for Select |
| | | | | | LED |
+---+-------------+----------------+---+------------+---------------+
J2 SCSI ID
-----------
+----------+-----------------------+
| SCSI ID | Jumpers |
| | ID2 | ID1 | ID0 |
+----------+-------+-------+-------+
|x 0 | OPEN | OPEN | OPEN |
| 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|
+----------+-------+-------+-------+
Up to eight devices (the host and seven targets) can be attached to
the SCSI bus. The 1936 drive has three ID jumpers. These three
jumpers are used to assign one of the eigth SCSI ID bits (0 through
7) to the drive.
SCSI ID = 0; factory default configuration.
In multiple-device systems, each drive must have its own unique ID
bit.
J2 Spindle Control Option
--------------------------
Pin 7-8 CLOSED The drive must wait for an interface START UNIT
command to start the spindle motor.
OPEN The drive automatically starts the spindle motor
at power-on. (Factory default configuration)
J2 Bus Parity Check Option
---------------------------
Pin 11-12 CLOSED The drive neither generates nor detects parity.
OPEN The drive generates parity and enables parity
detection.
J2 Write Protect Option
------------------------
Pin 13-14 CLOSED The drive is write protected. CAUTION: The
drive can still be formatted.
OPEN The drive is not write protected. (Factory
default configuration)
J4/J5 Ground Connectors
------------------------
3/16-inch spade lugs J4 and J5 are provided for grounding.
System characteristics determine proper ground connection.
W1/W2/W12 Bus Termination Power Option
---------------------------------------
+-----------------------+------------------------------------+
| Jumpers | |
| W1 | W2 | W12 | |
+-------+-------+-------+------------------------------------+
| CLOSED| OPEN | OPEN |The drive provides terminator power |
| | | |to its on-board terminators |
| | | |(Factory default configuration) |
+-------+-------+-------+------------------------------------+
| OPEN | CLOSED| OPEN |Terminator power is provided by the |
| | | |host via interface cable J1, pin 26 |
+-------+-------+-------+------------------------------------+
| OPEN | CLOSED| CLOSED|The drive provides terminator power |
| | | |to its on-board terminators and |
| | | |also to the SCSI bus via interface |
| | | |cable J1, pin 26 (TERMPWR) |
+-------+-------+-------+------------------------------------+
A jumper is installed at W1, at W2, or at W2 and W12 to select the
source of terminator power (+5V) for the SCSI bus terminator packs on
the Device Electronics board.
Do not install jumpers at both W1 and W12.
W8/9 Spindle Synchronization Option
------------------------------------
Jumpers installed (CLOSED) at W8 and W9 provide termination for the
Spindle Synchronization signals (Slace Sync and Master Sync respect-
ively).
When the Spindle Synchronization option is to be implemented, the
jumpers are removed from all drives except the last drive on the
cable.
The Rotational Position Locking field (MODE SELECT command, Page Code
04h) is used to specify spindle synchronization operation.
Unsynchronized: If the drive is set to Unsynchronized (RPL = 00b), it
ignores the SLAVE SYNC signal.
Slave: If the drive is set to Slave (RPL = 01b), it does not generate
the MASTER SYNC signal or the SLAVE SYNC signal but synchronizes its
index to the SLAVE SYNC signal (J2, pin 18) supplied by an external
source.
Master: If the drive is set to Master (RPL = 10b), it generates the
SLAVE SYNC output signal (J2, pin 18) for use directly by the slave
drives.
Master Control: If the drive is set to Master Control (RPL = 11b), it
generates the MASTER SYNC signal (J2, pin 16). This output is used by
the controller to generate the SLAVE SYNC signal (J2, pin 18) for the
slaves.
W11 Frame Ground Option
------------------------
W11 CLOSED Frame ground is connected to logic ground
OPEN Frame ground is not connected to logic ground
(Factory default configuration)
J3 DC Power and pin connector assignments
-------------------------------------------
+------------+ pin 1 +12 V
| 1 2 3 4 | pin 2 +12 V Return
+------------+ pin 3 + 5 V Return
pin 4 + 5 V
**********************************************************************
I N S T A L L
**********************************************************************
MICROPL. 1936S/D PRODUCT DESCRIPTION 110827 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
-----------------------
The 1936 drive uses industry-standard mounting techniques for 5 -inch
full-height Winchester disk drives.
The drive is designed such that the outer frame should be hard
mounted to the host equipment; no additional/external shock mounts
should be used.
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).
The term "ambient" becomes imprecise when referencing a drive in a
system, since it is difficult to determine where the air temperature
should be measured. To help resolve this confusion, Micropolis
specifies that the maximum HDA casting temperature (regardless of the
air temperature around the drive) is 60*C (140*F). Not exceeding this
temperature will ensure that the head-to-media interface never exceed
its temperature limit.
Mounting Screws
---------------
2 per side 6-32 UNC-2B
4 on bottom 6-32 UNC-2B
Caution: The mounting screws must be selected so that they do not
penetrate the bottom mounting holes by more than 0.20 inches or the
side mounting holes by more than 0.156 inches. Screws that are too
long will short to PCBA components and/or prevent operation of the
shock mount system.
SINGLE-ENDED Interface Electrical Characteristics
-------------------------------------------------
Interface control and status signals are digital (open collector TTL)
using industry-standard transmitters and receivers which provide
a terminated, single-ended system.
The assigned signals are terminated with 220 ohms to +5V (nominal)
and 330 ohms to ground at each end of the cable. All signals use
open-collector or three-state drivers.
Single-ended drivers and receivers allow a maximum cable length of
six meters (primarily for connection within a cabinet).
Signal transmission requires a single 50-conductor cable. A
characteristic impedance of 100 ( 10%) ohms is recommended for un-
shielded flat or twisted pair ribbon cable.
a. Input Characteristics
Each of the drive's signal receivers has the following
characteristics when measured at the interface connector.
1) Signal true = 0.0 VDC to 0.8 VDC
2) Maximum total input load = -0.4 milliamps at 0.5 VDC
3) Signal false = 2.0 VDC to 5.25 VDC
4) Minimum input hysteresis = 0.2 VDC
b. Output Characteristics
Each driven signal has the following characteristics when
measured at the interface connector.
1) Signal assertion = 0.0 VDC to 0.5 VDC
2) Minimum driver output capability = 48 milliamps (sinking) at
0.5 VDC.
3) Signal negation = 2.5 VDC to 5.25 VDC
c. Terminator Power (TERMPWR at Pin 26)
Terminator Power has the following requirements:
V(TERM) = 4.25 VDC to 5.25 VDC
800 milliamps minimum source drive capability, with 1.0 amp
recommended current limiting (e.g., a fuse).
1.0-milliamp maximum bus loading (except for the purposes of
providing power to an internal terminator).
Keyed connectors are provided to prevent accidental grounding or
misconnection of terminator power.
Interface Terminator packs provides proper termination for the
single-ended interface lines. For a multiple-drive system, the
terminator pack is installed in the last drive on the cable.
DIFFERENTIAL Interface Electrical Characteristics
-------------------------------------------------
Differential interface signals consist of two signal lines which are
denoted +SIGNAL and -SIGNAL.
A signal is defined as true when the +SIGNAL is more positive than
the -SIGNAL.
A signal is defined as false when the -SIGNAL is more positive than
the +SIGNAL.
Differential drivers and receivers allow a maximum cable length of
25 meters.
Signal transmission requires a single 50-conductor cable. A
characteristic impedance of 100 ( 10%) ohms is recommended for un-
shielded flat or twisted pair ribbon cable.
A minimum conductor size of 28 AWG should be employed to minimize
noise effects and ensure proper distribution of optional terminator
power.
A stub length of no more than 0.2 meters is allowed off the main-line
interconnection within any connected equipment.
a. Input Characteristics
Each of the drive's signal receivers has the following
characteristics when measured at the interface connector.
I (input current on either input) = 2.0 milliamps, maximum
Note: These characteristics include both receivers and passive
drivers.
This requirement is met with the input voltage varying between
-7V and +12V, with power either on or off, and with hysteresis
equaling 35 millivolts, minimum.
b. Output Characteristics
Each driven signal has the following characteristics when
measured at the interface connector.
VOL (low-level output voltage) = 1.7V maximum at IOL
where IOL = 55 milliamps
VOH (high-level output voltage) = 2.7V maximum at IOH
where IOH = -55 milliamps
VOD (differential voltage) = 1.0V minimum, with common-mode
voltage ranges from -7 to +12
VOL and VOH are measured between the output terminal and the
SCSI device's logic ground reference.
c. Terminator Power (TERMPWR at Pins 25 and 26)
Terminator Power has the following requirements:
V(TERM) = 4.0 VDC to 5.25 VDC
600 milliamps minimum source drive capability, with 1.0 amp
recommended current limiting (e.g., a fuse).
1.0-milliamp maximum bus loading (except for the purposes of
providing power to an internal terminator).
The 1936D drive provides keyed connectors to prevent accidental
grounding or misconnection of terminator power.
Interface Terminator packs provide proper termination for
the differential interface lines.
Signal Connector J1
-------------------
J1 is a 50-pin connector. Signal interface connection is made via
this connector. The signals on J1 include the 8-bit SCSI bus and
various control and handshaking lines.
Recommended Cable: 3M Scotchflex 3365/50 or equivalent.
Mating connector: 3M P/N 3425-3000 or equivalent.
J2 Multi-Function Connector/Jumper Block
----------------------------------------
J2 is a 24-pin, multi-function connector/jumper block.
J3 DC Power Connector
----------------------
J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector. Both +5V and +12V
are supplied to the drive via this connector.
Mating Connector: AMP 1-480424-0 or equivalent
Pins: AMP 350078-4
Suggested Wire Size: 18 AWG
Ground Connectors J4 and J5
---------------------------
3/16-inch spade lugs J4 and J5 are provided for grounding. Systems
characteristics determine proper ground connection.
Mating connector: AMP 60972-2 or equivalent.
Multiple-Drive Systems
----------------------
Up to seven 1936 drives can be connected to a single host.
Drive #1
+------HOST------+ +-----------------+
| +-----------+ +--+-SCSI-BUS-----+ J1 |
| |Terminators| | | +------+ J3 J4/J5 |
| +-----------+ | | | +--------+--------+
| | | | +------------------+
+----------------+ | | Drive #2 |
| | +-----------------+ |
+-------+------+ J1 | |
| o------+ J3 J4/J5 | |
| | +--------+--------+ |
| | +------------------+
| | Drive #3 |
| | +-----------------+ |
+-------+------+ J1 | |
| o------+ J3 J4/J5 | |
| | +--------+--------+ |
| | +------------------+
| | Drive #4 |
| | +--------------+--+ |
+-------+------+ J1 |T | |
o------+ J3 J4/J5 +--+ |
--DC-Voltages------+ +--------+--------+ |
---GROUND--------------------------+------------------+
T = TERMINATORS
Terminators are installed ONLY in the last physical drive in the
control chain.
Connectors J4 and J5 are provided for grounding; system character-
istics determine the proper ground connection.
Adjustments and Maintenance
---------------------------
1936 drives requires no adjustments or periodic maintenance;
additionally, no mechanical adjustments are required to prepare a
system for handling or shipment.
Field-Replacable Components
---------------------------
The concept of repair by replacement of complete functional
components is utilized in the 1936, resulting in an MTTR of less
than 15 minutes.
Differential Interface
----------------------
The 1936D differential interface drive is functionally and schematic-
ally the same as the 1936S single-ended interface drive in all areas
except those directly related to drivers, receivers, and control of
the differential interface.
The 1936D drive draws more power from the +5V power supply due to the
differential transceivers; power drain from the +12V power supply re-
mains the same as for the 1936S single-ended drive.
**********************************************************************
F E A T U R E S
**********************************************************************
MICROPL. 1936S/D PRODUCT DESCRIPTION 110827 REV. A
Micropolis 1936S (single-ended) and 1936D (differential) high-
performance, 5 -inch full-height Rigid Disk Drives provide OEMs with
random-access, high-speed data storage and meet the needs of diverse
applications environment. These drivers are compatible with the
"ANSI CCS" and "SCSI-2" versions of the industry-standard Small
Computer System Interface (SCSI) specification.
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 each media defect location. The defective
areas are identified by head address (HD), cylinder address (CYL),
and number of bytes from Index (BFI).
The list of manufacturer-found defects is stored on the drive in a
reserved, write-protected area accessible by the SCSI controller.
This list is known as the MDL (Manufacturers Defect List) or PList
(Primary Defect List).
A printed listing of the defects is also shipped with each drive. The
entries it contains can be mapped out (reassigned) automatically at
format control parameter bits.
Seek Time
---------
| 1936 |
----------------------------------+--------+
Track-to-Track read msec. typ. | 2 |
write msec. typ. | 3 |
Average msec. typ. | 12 |
msec. max. | 28 |
One-Third Stroke msec. max. | 12.5 |
Latency msec. avg. | 5.56 |
----------------------------------+--------+
1936D Drive Implementation
--------------------------
The 1936D drive is implemented using the same HDA mechanics and frame
assembly as used for the 1936S and a new Device Electronics Board,
which provides the functionality of the 1936S electronics but via the
SCSI differential interface.
The 1936 implementation is as follows:
- Industry-standard differential interface.
- Provides Terminator Power to Bus (jumper option).
- Proteted against accidental misconnection by standard DIFFSENS
signal.
- Small increase in power consumption due to use of differential
transceivers.
- Industry-standard mounting.
- Schematically identical to the 1936S except for differential
drivers.
- Uses the same SCSI control firmware as the 1936S for identical
commands and features.
- The 1936D mechanics is identical to the 1936S.