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Articles / TULARC / PC info / Hard Drives / MICROPOLIS Hard Drives / |  |
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Hard Drive: MICROPOLIS: 1538-15 910MB 5.25"/FH ESDI |
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1 5 3 8 - 1 5 MICROPOLIS
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 1669| | |
Capacity form/unform 910/ 1043 MB Heads 15| | |
Seek time / track 14.5/ 4.0 ms Sector/track 71| | |
Controller ESDI Precompensation
Cache/Buffer KB Landing Zone
Data transfer rate 2.875 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 19.0 W Altitude km -0.061 3.048| -0.305 15.240
idle W Shock g 8 | 20
seek W Rotation RPM 3600
read/write 24.0 W Acoustic dBA 40
spin-up W ECC Bit
MTBF h 150000
Warranty Month 60
Lift/Lock/Park YES Certificates
MICROPL. 1538 PRODUCT DESCRIPTION 110670 REV. A
+---------------------------------------------------------+ | |XX J12 | | | COMPONENT SIDE |XX | |XX | |XX J2 | +-+ |XX | | | | 1 | RN11 | |XX | +-+ |XX | Drive Adress 1-+ |XX J1 | | | |XX | Spindle Control | | |XX | Hard Sector | | |XX | Reserved +-W1 |XX | | 1 | W28+ |XX J3 | ++ |XX Power +---------------------------------------------------------+ 1
+--------------------------------------+
| +--+J4 HDA Ground |
| +--+ |
| |
| +--+J5 Frame Ground |
| +--+ |
| J2 J1 J3 |
| ........... XXXXXXXXXXXXXXXX XXXXXXX|
+-----Data---1----Control-----1-Power-1+
MICROPL. 1538 PRODUCT DESCRIPTION 110670 REV. A
Jumper setting
==============
x = Factory default configuration
Drive Address/Spindle Control/Hard Sector Configuration Jumper Block
--------------------------------------------------------------------
1-----+
| o o |DA3-+
| o o |DA2-+-- Drive Address
| o o |DA1-+
| o o |W5----- Spindle Control
| o o |W4--+
| o o |W3--+-- Hard Sector Configuration
| o o |W2--+
| o o |W1----- RESERVED (No jumper)
+-----+
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 RN11 provides proper termination for the interface
lines. When daisy-chaining multiple 1538 drives, the terminator is
installed only in the last drive on the daisy chain.
Sectoring Options
-----------------
The Sector/Address Mark Found signal is used to transmit sector
pulsed to the host controller. Sector pulses are derived from the
servo disk. The number of sector pulses generated is equal to:
+ +
|31,248| Where 31,248 = byte clock derived from servo
INT|------| disk
| n | INT = integer part of
+ + n = the number of unformatted bytes/
sector (82 minimum)
W2/W3/W4 Hard Sector Configuration
-----------------------------------
+--------+---------------------------+------------------------+
|Sectors | Bytes/Sector | Jumpers |
| | Formatted Unformatted | W4 W3 W2 |
+--------+---------------------------+------------------------+
| 68 | 520 612 | OPEN OPEN OPEN |
| x 71 | 512 582 | OPEN OPEN CLOSED|
| 38 | 1024 1096 | OPEN CLOSED OPEN |
| 18 | 2244 2314 | OPEN CLOSED CLOSED|
| 10 | 4096 4166 | CLOSED OPEN OPEN |
| 64 | 580 650 | CLOSED OPEN CLOSED|
| 121 | 272 342 | CLOSED CLOSED OPEN |
| 1 | 41594 41664 | CLOSED CLOSED CLOSED|
+--------+---------------------------+------------------------+
The number of bytes/sector may be specified using the Set Bytes Per
Sector command or by selecting a default sector configuration with
option jumpers W2, W3, and W4.
W5 Spindle Control Option
--------------------------
CLOSED The drive must wait for a Start Spindle command to start
the spindle motor.
x OPEN The drive automatically starts the spindle motor at
power-on.
W28 Frame Ground Option
------------------------
CLOSED Frame ground is connected to logic ground.
x OPEN Frame ground is not connected to logic ground.
J3 DC Power and pin connector assignments ------------------------------------------- -------------------+ --+ +-----J3-----+| pin 1 +12 VDC 1| | 4 3 2 1 || pin 2 +12 Volts Return -+ +------------+| pin 3 + 5 Volts Return ------------------+ pin 4 + 5 VDC
J12 RESERVED!
MICROPL. 1538 PRODUCT DESCRIPTION 110670 REV. A
Notes on installation
=====================
Recomended 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 1538 drive uses industry-standard mounting 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).
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.
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 limited,
a fan may be required.
Mounting Screws
---------------
2 per side 6-32 UNC-2B x 0.156 max deep.
4 on bottom 6-32 UNC-2B x 0.20 max deep
Caution: To avoid restricting HDA sway space, the mounting screws
must not penetrate the outer surface of the side mounting holes by
more than 0.156 inches or the bottom mounting holes by more than
0.20 inches. Screws taht are too long may short to PCBA components
and/or prevent proper operation of the shock mount system.
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 containing read or write data
signals.
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-LOK 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
-----------------------
3/16-inch spade lugs J4 and J5 are provided for grounding; system
characteristics determine the proper ground connection.
Mating Connector: AMP 60972-2 or equivalent.
Daisy-Chaining the 1538 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|RN11| |
+------------+ | +-------+--+----+ |
| | |
DC VOLTAGES -------------+ | |
GROUND ------------------------o-------------+
Interface Terminator RN11 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 disk drives may be connected to a single host controller/
formatter. The control signals at J1 are transmitted via the
standard, daisy-chain interconnection. The 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 control are
low-true at the interface, high-true into drivers and out receivers,
and have the following logic levels shown:
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 driveselection
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 1538 drive 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 1538 drive, resulting in an MTTR of
less than 15 minutes.
MICROPL. 1538 PRODUCT DESCRIPTION 110670 REV. A
Micropolis 1538 high-performance, 5 -inch Winchester Disk Drives
provide OEMs with high-speed, high-capacity, random-access storage
with a built-in intelligent controller.
The drives 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 each media defect location. The defects are
logged on a label affixed to the drive. The defective areas are
identified by head (HD) address, cylinder (CYL) address, and number
of Bytes from Index (BFI).
In addition to listing the defects on the label and the printout, the
defects are also mapped in the drive. The defect list is written for
each data surface. The list is written on the corresponding surface
in Sector 0 at three cylinder locations:
1) The maximum cylinder (1668).
2) The maximum cylinder minus 8 (1660).
3) A special cylinder which is accessed as "Cylinder 4095 (FFFh).
NOTE: The cylinder at the address of 4095 is a drive-unique location.
This is in compliance with the industry-standard ESDI specification.
Do not attempt to write to Cylinder 4095.
+-------------------------------------------------------------------+ | Micropolis specifies that all 1538 disk drives shall no more than | | one defect per megabyte of unformatted capacity. Additionally, | | Cylinder 0 and the cylinder at 4095 shall be defect-free at the | | time of shipment. | +-------------------------------------------------------------------+
Seek Time
---------
| 1538 |
----------------------------------+--------+
Track-to-Track msec. typ. | 4 |
Average msec. typ. | 14.5 |
msec. max. | 33 |
One-Third Stroke msec. max. | 15.5 |
Latency msec. avg. | 8.33 |
Nominal msec. max. | 16.67 |
----------------------------------+--------+
Data Transfer Signals
---------------------
All data-transfer lines between the drive and the host system are
differential and may not be multiplexed.
For pairs of balanced signals are used to transfer data: NRZ Write
Data, NRZ Read Data, Write Clock, and Read/Reference Clock.
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