Hard Drive: NEC: D3126 20MB 3.5"/HH MFM ST506
D 3 1 2 6 NEC
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 3.5"/HH Cylinders 615| | |
Capacity form/unform 20/ 25 MB Heads 4| | |
Seek time / track 85.0/18.0 ms Sector/track 17| | |
Controller MFM / ST506 Precompensation 128
Cache/Buffer KB Landing Zone 664
Data transfer rate 0.625 MB/S int Bytes/Sector 512
0.625 MB/S ext
Recording method MFM operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 5 50 | -40 60
Power: sleep W Humidity % 8 80 |
standby W Altitude km 3.000| -0.300 3.600
idle W Shock g 5 | 40
seek W Rotation RPM 3564
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 20000
Warranty Month
Lift/Lock/Park NO Certificates FCC
Layout
NEC D3126 PRODUCT DESCRIPTION REV. 1 806-520467 11/1986
+---------------------------------------------------------+ | |XX | |XX | |XX | |XX J2 | +-+Drive |XX | | |Address| | +-+ |XX | +-+Terminator |XX | PWB | |Resistor |XX J1 | | |ON/OFF |XX | | | |XX | +-+ |XX | |XX | |XX | +-+ | | +-+SG-FG XXXXXXPower +---------------------------------------------------------+
Jumpers
NEC D3126 PRODUCT DESCRIPTION REV. 1 11/86 806-520467
Jumper Settings
===============
Drive Address
-------------
+---------+
| x . . . | ON
| . x x x | OFF
DS-1-2-3-4-+
+-+-+-+
|
+-------- Drive Select (set only one bit to ON)
The -Drive Select 1,2,3,4 signals are control signals used for
logical connection between the disk controller and the disk drive to
be accessed.
With any one of the -DRIVE SELECT signals set to be "true", the
interface signal of connector J1 on the disk drive that has been
given the same number by the drive address switch is effective.
At the time of shipment the drive address is preset to allow
selection only when -DRIVE SELECT 1 is "true". If only one disk drive
is connected, -DRIVE SELECT 1 can be used without change.
If two or more disk drives are connected to a disk controller, change
the drive address.
+--------------+------+------+------+------+ |Drive Address | DS1 | DS2 | DS3 | DS4 | +--------------+------+------+------+------+ | 1 | ON | OFF | OFF | OFF | +--------------+------+------+------+------+ | 2 | OFF | ON | OFF | OFF | +--------------+------+------+------+------+ | 3 | OFF | OFF | ON | OFF | +--------------+------+------+------+------+ | 4 | OFF | OFF | OFF | ON | +--------------+------+------+------+------+
The front-panel LED illuminates when the disk drive is selected by
the corresponding -DRIVE SELECT signal and is in the READY state.
This disk drive allows functional change of control signal (connector
J1 signal) to the Radial system.
Changing to the Radial system is available by setting the terminator
resistor ON/OFF switch contact "1" to ON.
In this condition all input and output signals are effective
independently of thge -DRIVE SELECT signal. There is no change in the
turn-on conditions of the front-panel LED.
SW1 Terminator Res.
+-----------------+
| . x x x x x x x |ON
| x . . . . . . . |OFF Terminator ON, means active
+-R---------------+
+------------------ Radial Bit, always set to OFF!
Only the last drive on the cable must be terminated.
J1 Connector for control signal interface
J2 Connector for data signal interface
Ground Interface Physical Specification
---------------------------------------
At the time of shipment, Frame (FG) is connected to signal Ground
(SG) by the SG-FG Jumper on the PWA.
If the isolation between them is required, remove SG-FG Jumper.
Install
NEC D3126 PRODUCT DESCRIPTION 806-520467 11/86 REV. 1
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
UNACCEPTABLE! UNACCEPTABLE!
Never install PC board on the Top!
There are eight screw holes for #6-32 UNC screws.
Terminator
----------
Disk Controller land far-end D3126 requires Terminator.
Radial Type
-----------
+-------------------------------------------------+----------+
| |Data |
| DISK CONTROLLER |Separator |
| | |
+-+--------------+-------------+-------------+----+-+-+-+-+--+
| +--------+-------------+-------------+------+ | | |
| | | +------+-------------+--------+ | |
| | | | | +------+----------+ |
| | | | | | | +-----+
| | | | | | | |
| | | | | | | |
| | | | | | | |
| | | | | | | |
| | | | | | | |
+-+-----+---+ +-+------+-+ +-+------+-+ +-+------+-+
|J1 J2 | |J1 J2| |J1 J2| |J1 J2|
| | | | | | | |
| D3126 | | D3126 | | D3126 | | D3126 |
+----+------+ +----+-----+ +----+-----+ +----+-----+
*--------------*-------------*-------------+
DC POWER
Each cable must be less than 6 m (20 feet)!
Daisy Chain Type
----------------
+-------------------------------------------------+----------+
| |Data |
| DISK CONTROLLER |Separator |
| | |
+-+-----------------------------------------------+-+-+-+-+--+
| +-------------------------------------------+ | | |
| | +-----------------------------+ | |
| | | +-----------------+ |
| | | | +-----+
| | | | |
*-----+--------*------+------*------+------+ |
| | | | | | | |
| | | | | | | |
+-+-----+---+ +-+------+-+ +-+------+-+ +-+------+-+
|J1 J2 | |J1 J2| |J1 J2| |J1 J2|
| | | | | | | |
| D3126 | | D3126 | | D3126 | | D3126 |
+----+------+ +----+-----+ +----+-----+ +----+-----+
*--------------*-------------*-------------+
DC POWER
Each cable must be less than 6m (20 feet)!
Terminator resistor switch contact "2" "8" of far-end drive must be
ON, and any other drives must be OFF.
Switch contact "1" is prepared for radial connection.
Interface Cable Connector
-------------------------
J1 34 Pin AMP ribbon connector P/N 88373-3
J2 20 Pin AMP ribbon connector P/N 88373-6
J3 Power AMP Mate-N-Lock P/N 350211-1
Mate AMP Mate-N-Lock P/N 1-480424-0
Power
-----
+-----J3-----+ pin 1 +12 VDC
| 1 2 3 4 | pin 2 +12 Volts Return
+------------+ pin 3 + 5 Volts Return
pin 4 + 5 VDC
Features
NEC D3126 PRODUCT DESCRIPTION 806-520467 REV. 1 11/86
Installation Procedure
----------------------
Set the correct setup type and perform a low level format, in the
most cases can the media defect list be entered in this step. If you
cannot find a correct Setup Type use either a lower cylinder count or
special disk installation programms like DISK MANAGER from ONTRACK or
SPEEDSTOR from STORAGE DIMENSIONS.
Run under DOS FDISK and DOS FORMAT, the drive becomes bootable with
the command: FORMAT C:/s.
General Outline and Features
----------------------------
The D3126 magnetic Winchester disk drive is a random acces storage
device with 3.75" media and mini-Winchester type magnetic heads.
The formatted storage capacity is 20MB.
Media Defects
-------------
The D3126 magnetic disk drive is checked for presense of media
defects before shipped from the factory.
Maximum defects allowed are 48 locations per drive, and cylinder 0
is error free.
Media defects are indicated by the presence of a "1" bit in bit
position 7 of the HD byte in the ID field.
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