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Hard Drive: NEC: D3765 177MB 3.5"/SL IDE / AT |
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Articles / TULARC / PC info / Hard Drives / NEC Hard Drives / | |
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Hard Drive: NEC: D3765 177MB 3.5"/SL IDE / AT |
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D 3 7 6 5 NEC
Native| Translation
------+-----+-----+-----
Form 3.5"/SLIMLINE Cylinders 1486| 743| |
Capacity form/unform 177/ 236 MB Heads 4| 8| |
Seek time / track 16.5/ 6.0 ms Sector/track 58| 58| |
Controller IDE / AT Precompensation
Cache/Buffer 32 KB LOOK-AHEAD Landing Zone
Data transfer rate 2.365 MB/S int Bytes/Sector 512
MB/S ext
Recording method RLL 1/7 operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 5 50 | -40 60
Power: sleep W Humidity % 8 80 |
standby 1.3 W Altitude km 3.000| 12.000
idle W Shock g 5 | 55
seek W Rotation RPM 3600
read/write 4.8 W Acoustic dBA
spin-up 10.0 W ECC Bit
MTBF h 50000
Warranty Month
Lift/Lock/Park YES Certificates
NEC D3765 PRODUCT DESCRIPTION 806-521496-0
+---------------------------------------------------------+ | +--+JP11 |XX | +--+JP12 | | +--+JP13 |XX | +--+ |XX | |XX J1 | |XX | |XX | |XX | |XX | |XX | |XX | |XX | +--+JP16 |XX | +--+JP3 +--+JP15 |XX | +--+JP2 +--+JP14 | | +--+JP1 +--+ |XX Power | +--+ |XX J3 +---------------------------------------------------------+
NEC D3765 PRODUCT DESCRIPTION 806-521496-0
Jumper setting
--------------
x = Jumpers are set at factory
The drive has jumper plugs indicated by marking of JP11, JP12 and
JP13. These jumper plug are provided with various optional settings
as shown below.
JP11 Error Correction
----------------------
+----------------------------------------+--------+
|Function | JP11 |
+----------------------------------------+--------+
x |11-bit burst error is corrected. | CLOSED |
|ECC transfer is performed in 7 bytes by | |
|the Read/Write Long command. | |
+----------------------------------------+--------+
|5-bit burst error is corrected. | OPEN |
|ECC transfer is performed in 4 bytes by | |
|the Read/Write Long command. | |
+----------------------------------------+--------+
By allowing retry on execution of the Read Sector(s) command in the
drive, recoverable read error is automatically corrected with the
retry function of the drive itself.
JP12/JP13 Master/Slave mode
----------------------------
+----------------------------------------+--------+--------+
|Function | JP12 | JP13 |
+----------------------------------------+--------+--------+
x |Set one drive connection mode | CLOSED | CLOSED |
+----------------------------------------+--------+--------+
|No setting is allowed | CLOSED | OPEN |
+----------------------------------------+--------+--------+
|Set to two drives connection master mode| OPEN | CLOSED |
+----------------------------------------+--------+--------+
|Set to two drives connection slave mode | OPEN | OPEN |
+----------------------------------------+--------+--------+
Other Jumper Plugs
------------------
Other jumper plugs are used for the factory inspection. Do not change
the following setting.
+-----+------+------+------+-------+-------+
|JP1 | JP2 | JP3 | JP14 | JP15 |JP16 |
+-----+------+------+------+-------+-------+
|OPEN | OPEN | OPEN | OPEN | CLOSED|CLOSED |
+-----+------+------+------+-------+-------+
J1 PC/AT Connector Signal Names and Pin Assignment
---------------------------------------------------
+2-4-6-8-10- --40-+
| |
+1-3-5-7-9-- -----+
+------------+---------+----------+------------+
|Signal Name | Pin No. | Pin No. |Signal Name |
+------------+---------+----------+------------+
| -RESET | 01 | 02 | GROUND |
+------------+---------+----------+------------+
| DD7 | 03 | 04 | DD8 |
+------------+---------+----------+------------+
| DD6 | 05 | 06 | DD9 |
+------------+---------+----------+------------+
| DD5 | 07 | 08 | DD10 |
+------------+---------+----------+------------+
| DD4 | 09 | 10 | DD11 |
+------------+---------+----------+------------+
| DD3 | 11 | 12 | DD12 |
+------------+---------+----------+------------+
| DD2 | 13 | 14 | DD13 |
+------------+---------+----------+------------+
| DD1 | 15 | 16 | DD14 |
+------------+---------+----------+------------+
| DD0 | 17 | 18 | DD15 |
+------------+---------+----------+------------+
| GROUND | 19 | 20 | KEYPIN |
+------------+---------+----------+------------+
| RESERVED | 21 | 22 | GROUND |
+------------+---------+----------+------------+
| DIOW- | 23 | 24 | GROUND |
+------------+---------+----------+------------+
| DIOR- | 25 | 26 | GROUND |
+------------+---------+----------+------------+
| IORDY | 27 | 28 | ALE |
+------------+---------+----------+------------+
| RESERVED | 29 | 30 | GROUND |
+------------+---------+----------+------------+
| INTRQ | 31 | 32 | IOCS16- |
+------------+---------+----------+------------+
| DA1 | 33 | 34 | PDIAG- |
+------------+---------+----------+------------+
| DA0 | 35 | 36 | DA2 |
+------------+---------+----------+------------+
| CS1FX | 37 | 38 | CS3FX- |
+------------+---------+----------+------------+
| DASP- | 39 | 40 | GROUND |
+------------+---------+----------+------------+
A 40-pin right angle connector is used as the interface connector and
pin No.20 is cut off for prevention of erroneous connector insertion.
J3 Power Connector
-------------------
+---------+
| 1 2 3 4 |
+-+-+-+-+-+
| | | +------- + 5 VDC
| | +--------- + 5 VDC Return
| +----------- +12 VDC Return
+------------- +12 VDC
J8 External LED
----------------
+------+ 1 : LED anode side
| 1 2 | 2 : LED cathode side
----+------+---- PCB
NEC D3765 PRODUCT DESCRIPTION 806-521496-0
Notes on installation
=====================
Installation direction
----------------------
horizontally vertically
+-----------------+ +--+ +--+
| | | +-----+ +-----+ |
| | | | | | | |
+-+-----------------+-+ | | | | | |
+---------------------+ | | | | | |
| | | | | |
x x | | | | | |
+------x------x-------+ | +-----+ +-----+ |
+-+------x--x-------+-+ +--+ +--+
| xx |
| x x |
+---x--------x----+
x x
The D3756 can be installed either horizontally or vertically. In
horizontal installation, mount the drive to maintain a posture that
its printed-circuit board will be situated below (The drive cannot be
mounted with the interface connector J1 and the power connector J3
positioned above or below).
The drive has 10 mounting screw holes. Use these screw holes to fix
both frams for installation. It requires an interface cable and
power supply cable to operate the drive. Further, this drive has
various optional functions including master/slave configuration.
Frame
-----
The D3765 has a frame with 10 mounting screws holes. This frame is
insulated from the disk enclosure assembly with a shock absorber
for absorbing vibration and shock. On system installation, allow a
clearance of at least 2.54 mm around the drive to prevent the disk
enclosure assembly from contacting with the system frame.
Connector J1
------------
Connector J1 for the interface is a 40-pin box type and right angle
connector. Use the interface cable within the limit of 46 cm length.
Sample: Adapted connector on the J1 cable side:
DUPONT 66900-240 or equivalent (Integrated housing and pin)
Connector J3
------------
The power supply connector J3 is AMP P/N 350211-1 or equivalent.
The AMP P/N 1-480424-0 is applicable to a connector housing on the
cable side. For the power cable, take current consumption of the
drive and cable length into consideration. Use a connector pin suit-
able for the wiring.
Connector J8
------------
The drive is provided with a signal connector used to illuminate LED
to indicate that the drive is busy in exchanging data/command to and
from PC/AT host system. The signal connector is ELCO 00 8283 0211
00000 or equivalent.
The ELCO 60 8283 3028 45000 or equivalent is applicable to a housing
on the cable side and ELCO 60 8283 0513 99 808 is a receptacle
contact.
Jumper Plug Type
----------------
If the jumper plug setting is to be changed for the setting when it
is shipped from the factory, it can be done by unplugging the jumper
plug for the next setting change. If the jumper plug is required for
some reason or other, please use the following jumper plug:
Recommended Plug: DUPONT
LU-JUMP socket
68905-001
NEC D3765 PRODUCT DESCRIPTION 806-521496-0
General Outline and Features
----------------------------
The D3765 Magnetic Disk Drive is a storage device using 3.75"
magnetic disk platter and thin film magnetic head with unformatted
storage capacity of 235.8 MB, and adopts the PC/AT interface.
The rotary voice coil motor used in the magnetic head drive mechanism
brings about read and write operations with high-speed seek and high-
reliability, and its write system adopts the 1-7 RLL module method.
Features
With the Winchester technology employed, the magnetic disk platter
and magnetic heads are housed in the enclosure made of aluminium
alloy, which protects them from outside dust for higher reliability.
The sector servo mode system is used, in which servo signals are
obtained from the data recording surface for positioning the
magnetic head, and the rotary type voice coil motor in use has
allowed a high-speed seek in 16.5 milliseconds of average seek time.
The CSS (Contact Start Stop) area provided on the innermost cylinder
of the magnetic disk platters, together with auto retract function
and auto carriage lock mechanismem, assure a high reliability against
vibration and shock during transportation.
The built-in PC/AT interface is a standard interface for personal
computers and facilitates system configuration.
The Read Look Ahead Cache function by the track buffer is supported.
By using the magnetic disk drive with read/write capability of 2.365
MB per second in 1:1 interleave, the system operation speed is
enhanced.
Having the master/slave function, two drives can be connected in
daisy-chain using the same interface cable.
By supporting the General Translation function, the optional disk
parameter within disk storage capacity can be used.
Disk Enclosure Assembly
-----------------------
The disk enclosure (DE) comprises magnetic disk platters, magnetic
heads, head carriage mechanism, rotary voice coil motor and air
filter. The spindle motor to rotate the magnetic disk platters
consists in a inside-hup type DC brushless motor.
Printed-Circuit Board Assembly
------------------------------
PC/AT interface circuit, buffer RAM, DMA controller, read/write
control circuit, servo control circuit and spindle motor drive
circuit are installed for control on the overall operation of the
drive and interface. Further, Busy LED to indicate the drive opera-
tion state and the convenient LED connector for setting Busy LED
0outside is installed.
Interface Circuit
-----------------
Use by input and output conditions as shown below.
Input Signal Low = 0.0 VDC to 0.8 VDC
Signal High = 2.2 VDC to service voltage of 5 V.
Output Signal Low = 0.0 VDC to 0.4 VDC
(0.5 V @ 12mA Sink)
Signal High = 2.5 VDC to 5.25 VDC or Open Circuit
Reliability
-----------
MTBF 50,000 POH
MTTR Within 30 minutes
Periodical maintenance Not necassary
Service life 5 years or 20,000 POH whichever reaches
first. Up to 10,000 cycle for Contact
Start Stop.
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