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
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
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.
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.
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 | ----------------------------------+--------+