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Articles / TULARC / PC info / Hard Drives / MICROPOLIS Hard Drives / |  |
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Hard Drive: MICROPOLIS: 1373A 91MB 5.25"/FH SCSI1 SE |
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1 3 7 3 A MICROPOLIS
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 1024| 1018| |
Capacity form/unform 91/ 107 MB Heads 5| | |
Seek time / track 23.0/ 5.0 ms Sector/track 36| 35| |
Controller SCSI1 SINGLE-ENDED Precompensation
Cache/Buffer KB Landing Zone
Data transfer rate 1.600 MB/S int Bytes/Sector 512
MB/S ext
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 31.5 W Altitude km -0.061 3.048| -0.305 15.240
idle W Shock g 3 | 50
seek 37.5 W Rotation RPM 3600
read/write W Acoustic dBA 51
spin-up W ECC Bit
MTBF h 30000
Warranty Month
Lift/Lock/Park YES Certificates
MICROPL. 1370 SERIES PRODUCT DESCRIPTION 101689 REV. D
+---------------------------------------------------------+ | W1+-+ |X1 | W2| | |XX | +-+ |XX J1 | COMPONENT SIDE ++ |XX | RN1|| |XX | ++ |XX | ++ |XX | RN7|| |XX | ++ |XX | ++ |XX | RN8|| |+-+ID0 | ++ || |ID1 J2 | || |ID2 | || |W3 | || |W18 | || | | || | +---------------------------------------------------------++-+
+--------------------------------------+
| ++J4 |
| ++ |
| ++J5 |
| J3 Power++ |
| XXXXXX1 |
| J2 J1 |
| ............. XXXXXXXXXXXXXXXXXXXX |
+--------------1--------------------1--+
MICROPL. 1370 SERIES PRODUCT DESCRIPTION 101689 REV D
Jumper setting
==============
x = Jumper set at factory
J2 Drive Select ID2/ID1/ID0 ----------------------------- +--------+------------------------+ |Drive | Select Jumpers | |Address | 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 (any combination of hosts and targets) can be attached to an SCSI bus. The 1370 Series has three ID jumpers. These three jumpers are used to assign one of the eight SCSI ID bits (0 through 7) to the drive.
In multiple-device systems, each drive must have its own unique ID
bit.
Interface Terminator packs RN1, RN7, and RN8 provide proper termina-
tion for the interface lines. For a multiple-drive system, the
terminators are installed in the LAST drive on the cable.
J2 Multi-Function Connector/Jumper Block
-----------------------------------------
Multi-Function Connector/Jumper Block J2 can be used to connect the
drive to a user-supplied operator-panel.
J2 Pin 23 Logic ground
24 Not used
25 Write Protect Input. Logic Ground disables writing and
lights the Write Protect LED
26 Ready output. Logic ground indicates the drive is Ready
and lights the Ready LED
27 +5V source for the LEDs.
W1/W2 Bus Termination Power Option
-----------------------------------
+---------------+------------------------------------+ | Jumpers| | | W1 | W2 | | +-------+-------+------------------------------------+ | CLOSED| OPEN |The drive provides terminator power | | | |to its on-board terminators | | | |(Factory default configuration) | +-------+-------+------------------------------------+ | OPEN | CLOSED|Terminator power is provided by the | | | |host via interface cable J1, pin 26 | +-------+-------+------------------------------------+
A jumper is installed at W1 or W2 to select the source of terminator power (+5V) for the terminator packs on the Device Electronics board.
W3 Spindle Control Option
---------------------------
CLOSED The drive must wait for a START UNIT command to start the
spindle motor.
OPEN The drive automatically starts the spindle motor at
power-on. (Factory default configuration)
W18 Bus Parity Check Option
----------------------------
CLOSED The drive neither generates nor detects parity.
OPEN The drive generates parity and enables parity detection.
(Factory default configuration)
J3 DC Power and pin connector assignments
-------------------------------------------
+------------+ pin 1 +12 VDC
| 4 3 2 1 | pin 2 +12 Return
+------------+ pin 3 + 5 Return
pin 4 + 5 VDC
J4/J5 Ground Connectors
------------------------
3/16-inch spade lugs J4 and J5 are provided for grounding.
MICROPL. 1370 SERIES PRODUCT DESCRIPTION 101689 REV. D
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 1370 series uses industry-standard mounting techniques for
5 -inch half-height Winchester disk drives.
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
frame. If the enclosure is small or natural convetion is limited,
a fan may be required.
Mounting Screws
---------------
2 per side 6-32 UNC-2B x 0.25 deep
4 on bottom 6-32 UNC-2B x 0.22 deep
Caution: Screws must be selected so that they do not penetrate the
mounting holes more than .25 inches. Maximum torque applied to the
screws must not exceed 10 in-lbs.
Interface Electrical Characteristics
------------------------------------
Interface control and status signals are digital (open collector TTL)
utilizing 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
6.0 meters (primarily for connection within a cabinet). A stub length
of no more than 0.1 meters is allowed off the mainline interconnec-
tion within any connected equipment.
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 receiverd signal 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 0.4 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 0.4 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) = 4.0 VDC to 5.25 VDC
800 milliamps minimum source drive capability.
1.0-milliamp maximum sink capability (except for the purposes of
providing power to an internal terminator) with 1.0 mp
recommended current limiting (e.g., a fuse).
The 1370 Series provides keyed connectors to prevent accidental
grounding or misconnection of terminator power.
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 28-pin multi-function connector/jumper block used for
connecting the drive to a user-supplied Operator Panel. J2 is also
available for future drive options.
J3 DC Power Connector ---------------------- J3 is a 4-pin, keyed, AMP MATE-N-LOCK connector on the Motor Control board. Both +5V and +12V is 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
----------------------
Drive #1
+------HOST------+ +-----------------+
| +--+-SCSI-BUS-----+ J1 |
| | | +------+ J3 J4/J5 |
| | | | +--------+--------+
| | | | +------------------+
+----------------+ | | Drive #2 |
| | +-----------------+ |
+-------+------+ J1 | |
| o------+ J3 J4/J5 | |
| | +--------+--------+ |
| | +------------------+
| | Drive #3 |
| | +-----------------+ |
+-------+------+ J1 | |
| o------+ J3 J4/J5 | |
| | +--------+--------+ |
| | +------------------+
| | Drive #4 |
| | +-----------------+ |
+-------+------+ J1 RN1 RN7 RN8 | |
---DC-VOLTAGES-----o------+ J3 J4/J5 | |
+--------+--------+ |
---GROUND--------------------------+------------------+
Interface Terminators RN1, RN7, and RN8 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.
Up to seven 1370-series drives can be connected to a single host.
Adjustments and Maintenance
---------------------------
The 1370 Series 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 1370 Series, resulting in an MTTR of
less than 15 minutes.
Air-Filtration System
---------------------
Air is circulated throughout the clean area by disk rotation-
induced flow. A ducted air-filtration system draws the air through a
filter. The sealed area breathes to the outside via a another filter
for pressure equalization.
Drive Motor
-----------
Spindle rotation is provided by a quiet, brushless, direct-coupled
DC motor. Switching information for the electronic commutator is
supplied by three Hall-effect sensors mounted within the drive-motor
assembly.
MICROPL. 1370 SERIES PRODUCT DESCRIPTION 101689 REV. D
Interface
---------
The 1370 Series is fully compatible with the Small Computer System
Interface (SCSI) proposed by the American National Standards
Committee.
Seek Time
---------
| 1370 |
----------------------------------+--------+
Track-to-Track msec. typ. | 5 |
Average msec. typ. | 23 |
msec. max | 50 |
One-Third Stroke msec. max. | 25 |
Latency msec. avg. | 8.33 |
Nominal msec. max. | 16.67 |
----------------------------------+--------+
Formatted Capacity Calculation
------------------------------
The formatted capacity of the 1370 Series depends upon a number of
user-selectable variables. The following formula is used to calculate
the formatted capacity (C) of the 1370 Series using track-oriented
sparing:
C = [(SPT - SPARE_SPT) x HDS] x (1024 - 3 - SPARE_CYL) x (BYTES)
SPARE SPT is the number of spare sectors per track. This value
is user programmable from 0 to 3; a typical value for sparing is 1.
1024 is the number of physical cylinders.
3 cylinders, used by the drive, are not user accessible.
SPARE CYL is the number of spare cylinders. This is userprogrammable;
a typical value for sparing is 3.
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