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Articles / TULARC / PC info / Hard Drives / MICROPOLIS Hard Drives / |  |
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Hard Drive: MICROPOLIS: 1325 69MB 5.25"/FH MFM ST506 |
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1 3 2 5 MICROPOLIS
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 1024| | |
Capacity form/unform 69/ 85 MB Heads 8| | |
Seek time / track 28.0/ 6.0 ms Sector/track 33| | |
Controller MFM / ST506 Precompensation 65535
Cache/Buffer KB Landing Zone 1023
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 10 46 | -40 65
Power: sleep W Humidity % 10 80 | 10 80
standby 28.0 W Altitude km -0.061 3.048| -0.305 15.240
idle W Shock g 3 | 50
seek 38.0 W Rotation RPM 3600
read/write W Acoustic dBA 51
spin-up W ECC Bit
MTBF h 35000
Warranty Month
Lift/Lock/Park NO Certificates
MICROPL. 1320 SERIES PRODUCT DESCRIPTION 101400 REV. B-3
+---------------------------------------------------------+ | | | Interface +--+ |X1 J1 | COMPONENT SIDE Terminator | |RN1|XX | | | |XX | +--+ |XX | |XX | |XX | W1 +-+ |XX | W2 | | | | DS1| | |X1 | DS2| | |XX J2 | DS3| | |XX | DS4| | |XX | +-+ |XX | |XX | | | | +---------------------------------------------------------+
+--------------------------------------+
| ++J4 |
| ++ |
| ++J5 |
| J3 Power++ |
| XXXXXX1 |
| J2 J1 |
| XXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXX |
+--------------1--------------------1--+
Data Transfer Control Signal
MICROPL. 1320 SERIES PRODUCT DESCRIPTION 101400 REV B-3
Jumper setting
==============
Drive Select
------------
The drive-select jumpers are identified as DS1, DS2, DS3 and DS4.
Only one drive-select jumper is installed on a drive, and it is
addressed as drive 1 at the factory. Each Drive Select interface line
connects the correspondingly addressed drive to the host controller/
formatter. In multiple-drive systems, each drive must have its own
unique address.
Terminator RN1 provides proper termination for the interface lines.
When daisy-chaining multiple 1320 disk drives, the terminator is
installed only in the last drive on the daisy chain.
W1 is used for write-fault latching; W2 is always installed.
W1 Write Fault
---------------
When this signal is true, it indicates that a fault condition exists
at the drive. Writing is inhibited until the condition no longer
exists.
W1 CLOSED Faults are latched in the drive until they are cleared
by a select-to-deselect transition that lasts no less
than 50 microseconds in each state.
OPEN Fault conditions are not latched.
A Write Fault caused by an out-of-tolerance DC voltage is reset
automatically when the voltage is restored to nominal.
J3 DC Power and pin connector assignments
-------------------------------------------
+------------+ pin 1 +12 VDC
| 4 3 2 1 | pin 2 +12 Volts Return
+------------+ pin 3 + 5 Volts Return
pin 4 + 5 VDC
J4/J5 Ground Connectors
-----------------------
1/4-inch spade lugs J4 and J5 are provided for grounding; system
characteristics determine the proper ground connection.
MICROPL. 1320 SERIES PRODUCT DESCRIPTION 101400 REV. B-3
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 1350 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 0.25 deep.
4 on bottom 6-32 UNC-2B x 0.25 deep.
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 on the Motor Control board. 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 1320 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.
Up to four 1320 drives may be connected to a single controller/
formatter. Control and status signals on J1 are transmitted via
standard, daisy-chain interconnection. Read/Write data signals on 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 @ = 48 mA (maximum)
False = 2.5 VDC to 5.25 VDC @ = 250 uA (open collector)
Adjustments and Maintenance
---------------------------
The 1320 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 1320 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 another filter for
pressure equalization.
Drive Motor
-----------
Spindle rotation as provided by a quiet, direct-coupled, brushless DC
motor. Switching information for the electronic commuator is supplied
by three Hall-effects sensors mounted within the drive-motor
assembly.
MICROPL. 1320 SERIES PRODUCT DESCRIPTION 101400 REV. B-3
Micropolis 1320 Series high-performance, 5 -inch Winchester Disk
Drives provide OEMs with high-speed, high-capacity, random-access
storage. They are fully compatible with the industry-standard ST506/
ST412 interface and are designed to meet the needs of diverse
applications environments.
Write Precompensation
---------------------
It is recommended that write precompensation not be used. If the
system and/or controller is such that percompensation cannot be
turned off, it should be set to a cut in at trach 1024, or the
highest possible track.
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. A single defect is defined as being
less than two bytes long. A multiple defect is defined as two bytes
longer, or as a track with more than one single defect.
At the time of manufacture, a media test system evaluates each 1320
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.
The defect information for each surface is written onto the relevant
surface in a redundant manner such that the same information is
written in Sector 0 of Track 0; in Sector 0 of the maximum track
(i.e. the highest track); and in Sector 0 of the maximum track minus
eight tracks.
Micropolis specifies that all 1320 Series disk drives will have no
more than one defect per megabyte of unformatted capacity. Addition-
ally, Cylinder 0 shall be defect-free at the time of shipment.
Seek Time
---------
| 1320 |
----------------------------------+--------+
Track-to-Track msec. typ. | 6 |
Average msec. typ. | 28 |
One-Third Stroke msec. | 31 |
msec. max. | 62 |
Latency msec. avg. | 8.33 |
Nominal msec. max. | 16.67 |
----------------------------------+--------+
Average Seek Time assumes step pulses at a rate of 1 pulse per 20
usec. or faster.
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