D 5 8 9 2 NEC
Native| Translation
------+-----+-----+-----
Form 5.25"/FH Cylinders 1675| | |
Capacity form/unform 1403/ 1606 MB Heads 19| | |
Seek time / track 14.0/ 4.0 ms Sector/track | | |
Controller SCSI1 SINGLE-ENDED Precompensation 65535
Cache/Buffer 64 KB Landing Zone 1634
Data transfer rate 3.000 MB/S int Bytes/Sector 512
4.800 MB/S ext SYNC
Recording method RLL 2/7 operating | non-operating
-------------+--------------
Supply voltage 5/12 V Temperature *C 5 45 | -40 60
Power: sleep W Humidity % 8 80 | 8 90
standby W Altitude km 3.000| 12.000
idle W Shock g |
seek W Rotation RPM 3600
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 100000
Warranty Month
Lift/Lock/Park YES Certificates
**********************************************************************
L A Y O U T
**********************************************************************
NEC D5892 PRODUCT DESCRIPTION 806-521146-0 REV. B
+---------------------------------------------------------+
| +--+Dip |
| | |Switches |XX
| | |for SCSI |XX J1
| SW1+--+ID +-+ |XX
| SW4+-+ |XX
| +-+ |XX I
| | | |XX N
| SINGLE-ENDED SW3+-+ |XX T
| +-+ |XX E
| Dip Switches | | |XX R
| for terminating+SW2 |XX F
| resistors |XX A
| |XX C
| |XX E
| |
| |XX J3
| |XX Power
+---------------------------------------------------------+
**********************************************************************
J U M P E R S
**********************************************************************
NEC D5892 PRODUCT DESCRIPTION 806-521146-0 REV. B
Jumper Setting
==============
SW1 SCSI Address Setting
-------------------------
+------------------------+
|+-++-++-++-++-++-++-++-+|ON (CLOSED)
||x||x||x||x||x||x||x||x||
|+-++-++-++-++-++-++-++-+|OFF (OPEN)
+-1--2--3--4--5--6--7--8-+
| | | +---- Write Protect
2 1 0 | | +---------- Slow Cable
+--+--+ | +------------- Parity Enable
SCSI +---------------- Spinup Disable
Address
The SCSI address is factory-set to "0". If two or more SCSI devices
are connected to the same bus or the arbitration priority is to be
altered, alter the SCSI address with switches SW1-1, SW1-2 and SW1-3.
+----------+-------+-------+-------+
| SCSI ID | SW1-1 | SW1-2 | SW1-3 |
| | 2 | 1 | 0 |
+----------+-------+-------+-------+
| 0 | OPEN | OPEN | OPEN |
+----------+-------+-------+-------+
| 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|
+----------+-------+-------+-------+
SW1-4 SPINUP DISABLE
---------------------
When switch SW1-4 is ON, the drive motor is not turned on until the
host device issues the SCSI Start Unit Command. When this switch is
OFF, the drive motor is turned on automatically when the power is
turned on.
This switch is factory-set to OFF.
SW1-5 SCSI PARITY ENABLE
-------------------------
When switch SW1-5 is ON, SCSI bus parity is checked by this drive.
When this switch is OFF, SCSI bus parity is not checked.
This switch is factory set to ON.
SCSI parity is generated by this drive regardless of this switch
setting.
SW1-6 SLOW CABLE
-----------------
When switch SW1-6 is ON, the data setup times and transmit periods
when this drive transmitting to the SCSI bus are increased. When this
switch is OFF, the standard data setup times and transmit periods are
used.
This switch is factory-set to OFF.
SW1-7 has no function!
SW1-8 WRITE PROTECT
--------------------
When switch SW1-8 is ON, this drive is write-protected.
When this switch is OFF, this drive is not write-protected.
This switch is factory-set to OFF.
Terminator Power Setting
------------------------
SW2 SW3
ON +------------------------++------------------------+
|+-++-++-++-++-++-++-++-+||+-++-++-++-++-++-++-++-+|
||x||x||x||x||x||x||x||x||||x||x||x||x||x||x||x||x||
|+-++-++-++-++-++-++-++-+||+-++-++-++-++-++-++-++-+|
OFF+-1--2--3--4--5--6--7--8-++-1--2--3--4--5--6--7--8-+
| +--+--+--+--+--+--+----+--+--+--+--+--+--+--+---Termination
| ON/OFF
+-------------------------- Termination Power ON/OFF
ON +------------+ SW4
|+-++-++-++-+|
||x||x||x||x||
|+-++-++-++-+|
OFF+-1--2--3--4-+
+--+--+--+----Termination ON/OFF
SW2-1 Termination Power Setting
--------------------------------
When switch SW2-1 is ON, this drive provides terminator power for the
SCSI bus cable. When switch SW2-1 is OFF, this drive does not provide
terminator power.
This switch is factory-set to ON.
Terminating Resistor Setting
----------------------------
If three or more SCSI devices are connected to the same SCSI bus, the
terminating resistors of SCSI devices except the one located at the
furthest end of the cable must be set to OFF.
In this drive, the terminating resistors can be switched ON or OFF
with switches SW2-2 to 8 and SW3-1 to 8.
The terminating resistor switches of this adapter is factory-set to
ON. Set them to OFF unless connected at the furthest end of the
cable.
Spindle Motor Starting
----------------------
The initial operation the D5892 performed when power is turned on
depends on the setting of the Spinup Disable Switch.
Spinup Disable Switch is OFF
When the drive detects that the +5 VDC and +12 VDC power supplies are
within the specified ranges, it executes drive power up tests. After
the tests are complete, it becomes ready for SCSI interface logical
connection, and starts the spindle motor. It becomes ready for the
SCSI commands that require the drive ready when the spindle motor
rotation gets to the specific speed.
Spinup Disable Switch is ON
When the drive detects that the +5 VDC and +12 VDC power supplies are
within the specified ranges, it executes drive power up tests. It
becomes ready for SCSI interface logical connection, and ready for
the SCSI commands that don't require the spindle motor is rotating.
It doesn't start the spindle motor until it receives the SCSI Start
Unit Command.
**********************************************************************
I N S T A L L
**********************************************************************
NEC D5892 PRODUCT DESCRIPTION 806-521146-0 REV. B
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!
The D5892 magnetic disk drive can be installed both horizontally and
vertically. When installing the drive horizontally, be sure to
install the drive with the main printed wiring assembly faced down.
(Do not face the front panel of the drive upward or downward.)
Fix the drive using four tap holes. Use #6-32UNC (4mm or less deep).
The SCSI bus cable, power cable, and frame ground cable are required
to operate the drive. If two or more SCSI devices are connected to
the same SCSI bus cable, SCSI address setting and terminating
resistor ON/OFF switches must be altered properly. The drive has some
optional function setting by switches to be set depending on the
desired operating.
When natural cooling is used, be sure that the air around the drive
circulates smoothly so that the heat generated by the drive does not
accumulate.
When the drive is installed in a cabinet, use a fan in order to
circulate the air.
Interface Connector
-------------------
Connector J1 is a 50-pin non-shielded connector used for interface to
the SCSI bus.
50 conductor flat cables and 25-signal twisted-pair cables can be
used for the SCSI bus. Cables of impedance 100 ohms +10% and
conductor diameter 28 AWG or more should be used to match the
impedance of the drive.
Power Connector
---------------
Connector J3 for power supply is an AMP P/N 172294-1 or the
equivalent.
The connector housing AMP P/N 1-480424-0 of the cable suits this
connector. Select a power cable, considering the current consumption
and cable length, and use connector pins that suit the cable
material.
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
Frame Ground Connector
----------------------
Connector J4 for frame ground is an AMP P/N 61761-2 or the
equivalent.
The disk enclosure assembly does not have to be grounded because it
is connected to the signal ground.
SCSI Bus
--------
On the SCSI bus, only two SCSI devices can communicate at any given
time. When two SCSI devices communicate, one acts as the Initiator
and the other acts as the Target. The Initiator originates an
operation and the Target performs the operation. The D5892 always
acts as the Target.
The following figure shows examples of SCSI bus connection. This
drive has connector J1 for connection to the SCSI bus cable.
The device connected at each furthest end of the cable must have
terminating resistors installed. This drive has terminating resistor
switches with which terminating resistors can be installed or removed
easily.
Single Initiator, Single Target
+---------+ +--------+
|Initiator|<----SCSI-BUS------------->| Target |
+---------+ +--------+
Single Initiator, Multi Target
+---------+ +--------+
|Initiator|<----SCSI-BUS------+------>| Target |
+---------+ | +--------+
|
| +--------+
+------>| Target |
+--------+
Multi Initiator, Multi Target
+---------+ +--------+
|Initiator|<--+-SCSI-BUS------+------>| Target |
+---------+ | | +--------+
| |
| |
+---------+ | | +--------+
|Initiator|<--+ +------>| Target |
+---------+ +--------+
**********************************************************************
F E A T U R E S
**********************************************************************
NEC D5892 PRODUCT DESCRIPTION 806-521146-0 REV. B
Outline and Features
--------------------
The D5892 Magnetic Disk Drive is a 5.25-inch Winchester disk drive,
having an unformatted storage capacity of 1.6 Mbytes, employing Small
Computer System Interface (SCSI).
Features
--------
SCSI Interface
Employs Single-ended interface.
Supports synchronous SCSI bus data transfers up to 5.0 Mbyte per
second.
Executes asynchronous SCSI bus data transfer with quick response of
REQ/ACK handshakes in Data IN/OUT phase.
Contributes to reduction of overhead of SCSI command execution with
quick changes in bus phases.
Supports logical block sizes of 512 through 4096 bytes in one byte
granularity.
Supports the defect management that tries to allow contiguous access
to sequential logical blocks around a defective block to reduce the
additional latency time.
Drive Configuration
-------------------
The D5892 magnetic disk drive consists of a disk enclosure assembly
that contains recording disks, Read/Write heads assembly, etc., two
printed wiring assemblies, a frame, and a front panel.
Disk Drive
----------
Performs highly reliable accessing at high speed by a voice coil
motor with its servo surface located in the middle of the disk drive.
Provides a Contact Start/Stop (CSS) area on the innermost of magnetic
media.
Protects the drive from delivery vibration and impacts by the auto
retract functions to the CSS area.
Uses a brushless DC spindle motor controlled by a dedicated micro-
processor for precise speed control.
Seek Time
---------
+----------------------------------+--------+
| | D5892 |
+----------------------------------+--------+
|Track-to-Track msec. typ. | 4 |
+----------------------------------+--------+
|Average msec. typ. | 14 |
| msec. max. | 40 |
+----------------------------------+--------+
|Latency msec. avg. | 8.33 |
+----------------------------------+--------+
User Data Capacity
------------------
+---------+-----------+-------------+
|Bytes per|Sectors per|Capacity (MB)|
|Sector |Track | |
+---------+-----------+-------------+
| 512 | 85 | 1,382.5 |
+---------+-----------+-------------+
| 1024 | 44 | 1,431.3 |
+---------+-----------+-------------+
| 2048 | 22 | 1,431.3 |
+---------+-----------+-------------+
| 4096 | 11 | 1,431.3 |
+---------+-----------+-------------+
**********************************************************************
G E N E R A L
**********************************************************************
NEVER
Announced but never produced.
NEVER PRODUCED!!!