Hard Drive: FUJITSU: M2321K MB 8,0"/FH SMD
M 2 3 2 1 K FUJITSU
NO MORE PRODUCED Native| Translation
------+-----+-----+-----
Form 8"/FH Cylinders 823| | |
Capacity form/unform / 84 MB Heads 5| | |
Seek time / track 20.0/ 5.0 ms Sector/track | | |
Controller SMD Precompensation
Cache/Buffer KB Landing Zone
Data transfer rate 1.229 MB/S int Bytes/Sector 256
MB/S ext
Recording method MFM operating | non-operating
-------------+--------------
Supply voltage 5/24 V Temperature *C 5 40 | -40 60
Power: sleep W Humidity % 20 80 | 5 95
standby W Altitude km 3.000| 12.000
idle W Shock g 2 | 15
seek W Rotation RPM 3600
read/write W Acoustic dBA
spin-up W ECC Bit
MTBF h 10000
Warranty Month
Lift/Lock/Park - Certificates
Layout
FUJITSU M2321/M2322 OEM MANUAL B03P-4740-0101A...02, JAN. 1984
STTG1++STS4
+-------------------------------------------++------------+
| STTG2--***** *RDY |XX
| STS2+| *FPT |XX B
| STS1+ *SPGD |XX
| |XX 26P
| Top View 7--+SW1 |XX
| | | |XX
| ON 1--+ OFF |
| |XX 60P
| |XX
| |XX
| |XX A
| |XX
| SW2 |XX
| ON 7--+ 7--SW3 OFF |XX
| | | | | |XX
| 1--+ 1--+ |XX
+---------------------------------------------------------+
Dual Channel PCB Assembly Connector Location (Option)
-----------------------------------------------------
Power Supply (14P) (14P) (26P)
^ CN33 CZFM.S3 CZFM.S5 CZFM.CN2
| ^ ^ ^
+----------------+-------+----------------------------+--------+
| ++++-++CN25 | | +---------+ |
| +++++++ +-----+ +-----+ +--CN24---+ |
| +-S2--+ +-S4--+ CZFM.S2(14P) CZFM.S4(14P) |
| ^ ^ |
| | | |
| +------+ +-S3--+ |
| +-S1---+ CN28 +-----+ |
| xxxxxx +CN29-+ |
| xxxxxx +-----+ |
| CN27 |
| TRM1 TRM2 |
| *** *** |
| 321 321 |
| |
| |
| |
| |
| |
| |
| |
| TRM3 +-------------+ |
| *** +--CN23-------+ |
| 123 Ach-B cable |
| +-TRM-+ +-TRM-+ +--TRM+ +--TRM+ *CHBRSV LED*CHARSV LED |
| +-----+ +-----+ +-----+ +-----+ *CHBSLD LED*CHBSLD LED |
| +--++--++--+ |
| +------------------------------+ | || || | +----------+ |
| | CN21 | +-+++-+++-++ | CN22 | |
+---+------------------------------+--P-P-D-N-D-N-+----------+-+
^ L L I O I O ^
Bch-A cable T T S R S R Bch-B cable
Insert Ach-A cable to M M M M
CZFM.CN1 ON OFF +++
+++ Channel A
Channel B
Jumpers
FUJITSU M2321/M2322 OEM MANUAL B03P-4740-0101A...02, JAN. 1984
Jumper Settings
===============
Model Select Settings
---------------------
When the M232X Micro Disk Drive is installed in the system, the
Customer must set switch 1 through 3 according to system
requirements; these switches determine, Disk Logical Unit Number,
Sector Mode, Tag 4/5 Enable, File Protect and Sector Counting, Switch
1 through Switch 3 is located on the CZFM PCB Assembly.
SW1 Disk Addressing
--------------------
Disk Logical Unit Number 0 to 7 is selected by SW1 at location E3 on
the CZFM PCB assembly. Set the desired disk address with the three
keys on SW1 using the binary code as shown in the following table.
+------------+------+-------+--------+ xx+ |
| |Key 1 | Key 2 | Key 3 | 03+----xx+ |Key 3
|Disk Address| 2(1) | 2(2) | 2(3) | | +----xx+ |
+------------+------+-------+--------+ |02+----xx+ |Key 2
| 0 | OFF | OFF | OFF | | +----xx+ |
| 1 | ON | OFF | OFF | |01+----xx+ |Key 1
| 2 | OFF | ON | OFF | ON+---SW1------OFF
| 3 | ON | ON | OFF | E3 (CZFM)
| 4 | OFF | OFF | ON |
| 5 | ON | OFF | ON |
| 6 | OFF | ON | ON |
| 7 | ON | ON | ON |
+------------+------+-------+--------+
SW1 Device Type (optional)
---------------------------
The device tyoe, M2321 or M2322, can be selected by setting Key 4 on
SW1.
NOTE Tag 4/5 feature must be enabled to obtain device type status. +-----------+-----+ |Device Type|Key 4| | +------+ | +-----------+-----+ |4+----xx+ |Key 4 | M2321 |OFF | | +----xx+ | | M2322 |ON | +------+ | +-----------+-----+ ON SW1 |OFF
SW1 Tag 4/5 Enable
-------------------
The M232XK provides optional Tag 4 and Tag 5 functions. The customer
may disable or enable these optional functions using Key 5 on SW1 at
location E3 on the CZFM PCB assembly.
Disabling the Tag 4 and Tag 5 functions inhibits the receivers of Tag
4 and Tag 5 receivers on the interface.
+-------+------+
|Tag 4/5| Key 5| These signals gate additional information on
+-------+------+ Status 0 to 5 lines of the A cable. When Tag
|Disable| OFF | 4 and 5 are disabled, Status 0 to 5 lines
|Enable | ON | indicate Unit Status only.
+-------+------+
SW1 Sector Mode
----------------
The customer can select Hard Sector mode (1 to 128 sectors) or
Variable Soft Sector mode, using Key 6 on SW1 at location E3 on the
CZFM PCB assembly.
+--------------------+-----+ In the case of Hard Sector, the customer |Sector Mode |Key 6| must set the number of sectors per disk +--------------------+-----+ revolution. Setting the number of |Hard Sector |OFF | sectors per revolution is also available |Variable Soft Sector|ON | in the Variable Soft Sector mode. +--------------------+-----+
SW1 File Protect ----------------- When the customer desires to inhibit the write operation, the File Protect key may be set to the ON position, using Key 7 on SW1. +---------------+------+ |File Protect | Key 7| File Protected signal, enabled by a switch +---------------+------+ on the PCB assembly, indicates all tracks |Enable writing | OFF | are in write-protected status. Attempting |Disable writing| ON | to write while this signal is on will cause +---------------+------+ a fault.
SW2/SW3 Sector Counting
------------------------
Sector count configuration switches SW2 and SW3 are located at A26
and A24 respectively on the CZFM PCB assembly. Each key of SW2 and
SW3 represents the binary powers of the Byte Clock.
+-----------+--------+-----------+-------+
|SW2 Key No.| Value |SW3 Key No.| Value |
+-----------+--------+-----------+-------+
| 1 | 1 | 1 | 128 |
| 2 | 2 | 2 | 256 |
| 3 | 4 | 3 | 512 |
| 4 | 8 | 4 | 1024 |
| 5 | 16 | 5 | 2048 |
| 6 | 32 | 6 | 4096 |
| 7 | 64 | 7 | 8192 |
+-----------+--------+-----------+-------+
SW2 and SW3 keys must be set according to the number of bytes per
sector. Knowing that the number of bytes possible on a track equals
20,480, any sectoring requirement from 1 to 128 sectors per track can
be configured using the following formulas:
1. Calculation based on Sectors/Track
Examble 9 Sectors/Track
1. 20,480 20,480
----------------- = Number of Bytes ------ = 2,275.555
Number of sectors per sector 9
2. If the above calculation results in a remainder, truncate the
remainder and add one to the integer portion of "number of
bytes per sector" 2,275 + 1 = 2,276
3. Configure SW2 and SW3 to "number of bytes per sector" less one
to allow for Sector Counter Reset Clock. 2,276 - 1 = 2,275
2,275 = 2,048 + 128 + 64 + 32 + 2 + 1
Keys must be "ON": Key # 5 1 7 6 2 1
+-------+ +-------------+
SW3 SW2
4. To determine how many bytes (if any) the last sector of each
track will be short, multiply "number of bytes per sector" by
"number of sectors" and subtract 20,480.
2,276 * 9 = 20,484
- 20,480
--------
Last sector short 4 bytes
2. Calculation based on Bytes/Sector
Example: 583 Bytes/Sector
1. Calculate the Value = 16,384 - (Byte/Sector)
to be set. (Particu-
lar Value)
= 16,384 - 583
= 15,801
2. Select the keys must be OFF positiopn after the following
calculation.
15,801 = 8,192 + 4,096 + 2,048 + 1,024 + 256 + 128 + 32 + 16 + 8 + 1
Keys must be "OFF": 7 6 5 4 2 1 6 5 4 1
+-+-+++-+-+ +-+++-+
SW3 SW2
3. Calculate the Sectors/Track
Bytes/Track 20,480
Sectors/Track = ----------- = ------- = 35.129
Bytes/Sector 583
4. If the above calculation results in a remainder, truncate the
remainder. The integer postion means actual sectors per track.
Actual Sectors/Track = 35
5. Calculate the number of the last sector (remainder).
Last Sector Length = 20,480 - (Bytes/Sector) * (Sectors/Track)
= 20,480 - 583 * 35
= 75
Operator Panel Connection
-------------------------
The CZFM PCB allows for connection of an optional control panel. At
location on this PCB, there is a 14 pin DIP socket for the control
panel connection.
Pin Number Signal Mnemonic Definition
1 +5V +5 Volt
2 *FPTK File Protect Switch
3 *CKCLR Check Clear Switch
4 *LRDY Ready LED
5 0V Signal Ground
6 *LUSLD Unit Selected LEd
7 0V Signal Ground
8 0V Signal Ground
9 *PWRDY Power Ready LED
10 *LFPT File Protect LED
11 *LDYCK Device Check LED
12 0V Signal Ground
13 0V Signal Ground
14 +5V +5 Volt
"*" Indicates a low active signal
Install
FUJITSU M2321/M2322 OEM MANUAL B03P-4740-0101A...2, JAN. 1984
Notes On Installation
=====================
General Description
-------------------
Two M232X Micro Disk Drive can horizontally mounted in a 9 inch rack
with optional mounts hardware. The M232X may also be built into a
system cabinet and mounted horizontally or vertically. An operator
oanel (with slide rails) is available.
The CZFM Printed-Circuit Board Assembly in the M232X Micro Disk Drive
is equipped with Maintenance Aid LED's and File Protect switch.
Powering up/down and the functions of the internal installed
indicators (LED) and switches will be described in this section. The
fnctions of the LED's and switches on the operator panel will also
be described.
Powering up/down
----------------
The M232X Micro Disk Drive is not equipped with a power ON/OFF
switch. Powering up/down of the M232XK's typically performed by a
powering up/down of the system.
When the disk unit is equipped with an optional power supply, power-
ing up/dowm may be performed by turning the power switch ON and OFF
at the power supply.
Control and Indicators
----------------------
Operator Panel (option)
+----------------------------------------------------------------+ | Power Ready | | +------------+ +-+--+-------+ | | |+-++-+ +-+| |+-++-+ +-+| | | |+-++-+ +-+| |+-++-+ +-+| | | |+-++-+ +-+| |+-++-+ +-++PTCT | | |+-++-+ | |+-++-+ | | | +------------+ +-+--+-------+ | | Protect Check | +--Operator-Panel-(Optional)-------------------------------------+
Power indicator: Red - This LED lights when the power is turned on.
Ready indicator: Red - This LED indicates the initial seek has
performed or indicates the termination of a Seek
or RTZ operation.
Check indicator: Red - This LED indicates any fault condition.
Protect indicator: Red - This LED indicates that writing is inhibited
Protect (PTCT) switch: White - This key inhibites the write operation
Check clear switch: Gray (flat key) - This key resets a Device
Check status.
CZFM PCB Assembly
-----------------
The unit contains fault display indicator (LED's) and File-protect
switch.
RDY (Ready) indicator: Green
This RDY LED indicates that the initial seek has been performed or
indicates the termination of a Seek or RTZ operation.
FPT (File Protect) indicator: Orange
This LED indicates that writing is inhibited.
SPGD (Speed Good) indicator: Green
This LED indicates that rotational Speed is within the specified
speed.
STS1 to 4, STTG1 and STTG2 (Status and Status Tag): Red
The two-bit binary coded Status Tag 1 and 2 LED's have the following
conditions.
Status Status Condition
Tag 2 Tag 1
0 0 : Power-up Sequence
0 0<-- 1
0 -->1 : Power-up Sequence Check
0 1 : Fault
1 0 : Seek Error
1 1 : Normal Status
The Status Tag 00 has the highest priority and Status Tag 11 has the
lowest priority.
Power Supply
------------
The optional power supply may be provided with the M232XK.
+-------------------------------------------------------------------+ | +---+ Power ON * | | AC++ |1 Power ALM * | | IN++ | Device ALM* | | PUT| TRM1 X Fuse | | | | (AC output) +24Vxx | | FG| |3 +5VXX | | | | -0VXX | | ALM+ | +-+ FG SG TRM2 -12VXX | | ++ | +-+ +----x----+ 2 3 | | | |5 MAIN LINE +---------+ +-------------+Volt Check* | | +---+ SWITCH 7.5A AC100V AC220V| | +5V Volt ADJ | | AC115V AC240V+-------------+ | +------------------------AC120V-------------------------------------+
Front View of Power Supply Unit
Power Supply Unit
A power supply unit may either be mounted horizontally behind the
disk drive or may be mounted vertically.
Specification: B14L-5105-0100A
Back View TRM1: AC power input and alarm sending
+----CN31+ TRM2: FG-SG coupling terminal (Normally open)
|xxx XXX | CN31: Drive unit power feeding connector (for cable
|CN33 | B660-0625-T327A (Option))
| | CN32: Fan unit power feeding connector (for cable B660-
| | 0625-T328A (Option))
| | CN33: Dual channel PCB unit power feeding connector
| CN32Xx| (for cable B660-0625-T329A (Option))
+--------+
AC input voltage selection from 100/115/120V AC to 220/240V AC is
switched selectable. Also regardless of AC input voltage, AC output
voltage from CN2 (fan unit power supplying connector) is kept +15% AC
-24%
Therefore when using the option power supply only the 115V AC fan is
required.
Connection
----------
The interface connection between MDD and the control unit consists of
two connectors "A" and "B". A cables, which are connected with
connector "A", may be connected in a daisy-chain configuration. A
line terminator must be inserted into the "A" connector of the
last MDD. B cables, which are connected with connector "B", are
connected in a radial configuration. "A" cables can also be connected
in a radial configuration.
Timing Specification
--------------------
Timings are specified at the connector position of the MDD unless
otherwise specified. Accordingly, it is necessary for signal timings
to consider both the delay time of the interface cables
(approximately 5ns/m) and the circuits of the disk control unit.
Daisy-chain Configuration
+-------------------------------- -------+
| Control Unit I |
|A B0 B1 B2 B7|
++---+----------+----------+----- ------++
| | | | |
+---+------+---+------+---+----- --+ |
+++ +++ +++ +++ +++ +++ +++ +++
|A| |B| |A| |B| |A| |B| |A| |B|
+-+-+-+ +-+-+-+ +-+-+-+ +-+-+-+
| | | | | | |xx |
|MDD#0| |MDD#1| |MDD#2| |MDD#7|
| | | | | | |xxmax|
+-+-+-+ +-+-+-+ +-+-+-+ +-+-+-+
|A| |B| |A| |B| |A| |B| |A| |B| +
+++ +++ +++ +++ +++ +++ +++ +++ |
+---+------+---+------+---+----- --+ | |
| | | | | |
++---+----------+----------+----- ------++ + Used in Dual Port
|A B0 B1 B2 B7| | only
| Control Unit II | |
+-------------------------------- -------+ +
xx = indicates line terminator
Star-chain Configuration
+-------------------------------- -------+
| Control Unit I |
|A0 B0 A1 B1 A2 B2 A7 B7|
++---+------+---+------+---+----- --+---++
| | | | | | | |
| | | | | | | |
+++ +++ +++ +++ +++ +++ +++ +++
|A| |B| |A| |B| |A| |B| |A| |B|
+-+-+-+ +-+-+-+ +-+-+-+ +-+-+-+
|xx | |xx | |xx | |xx |
|MDD#0| |MDD#1| |MDD#2| |MDD#7|
|xx | |xx | |xx | |xxmax|
+-+-+-+ +-+-+-+ +-+-+-+ +-+-+-+
|A| |B| |A| |B| |A| |B| |A| |B| +
+++ +++ +++ +++ +++ +++ +++ +++ |
| | | | | | | | |
| | | | | | | | |
++---+------+---+------+---+----- --+---++ + Used in Dual Port
|A0 B0 A1 B1 A2 B2 A7 B7| | only
| Control Unit II | |
+-------------------------------- -------+ +
xx = indicates line terminator
Signal Transmission Driver/Receiver
-----------------------------------
Balanced transmission method in transferring signal within the inter-
face. This method is suitable for only range transmission and also
not susceptible to external noise.
Driver SN75110 or equivalent
Receiver SN75107/SN75108 or equivalent
NOTE A Cable
Line terminators R1 and R2 (56 5%, 1/10W) are located on the
driver side and R3 and R4 (56 5%, 1/10W) are located on the re-
ceiver side. The line terminators are required on the control unit
and the terminator assembly of the last disk unit.
The maximum cable length is 30 meters.
NOTE B Cable
The cable shall be flat with characteristic impedance of 130 13 .
Line terminators R1 and R2 (82 5%, 1/10W) are located on the
control unit or the input terminal of the disk drive.
Line protectors R3 and R4 (470 5%, 1/10W) are located on the
control unit or the imput terminal of the disk drive.
Time delay of the cable is approximately 5ns/m. Transfer time and
delay of the Receiver (SN75107) is 19ns nominal for both high and low
signals.
To prevent false operation of the receiver, due to interface
disturbances during a power failure of the unit, the bias resistors
are used on the controller side for Unit Selected and Seek End
signals.
Maximum cable length is 15 meters.
R5 and R6 (15K 5%, 1/10W) are used to prevent the receiver output
signal from oscillating when input signals are both high.
Channel Ready
-------------
The Channel Ready signal must be issued to protect data due to inter-
face disturbances during a power failure of the control unit. It is
preferrable to use some type of bias circuit, i.e. a relay circuit
using passive elements, in transmitting this signal.
If SN75110 is used as a driver, it is desirable to use two of them
in parallel.
Whatever type of circuit is used, as far as this signal is concerned,
the line terminator on the driver side is not needed.
Connector and Cable
-------------------
A Cable Connector (60 pos.)
Header Specfication FCN-702P060-AU/M (Wire wrapping)
FCN-704P060-AU/M (Straight)
FCN-705P060-AU/M (Right Angle)
Socket Specification FCN-707J060-AU/B (Closed End)
FCN-707J060-AU/O (Through End)
B Cable Connector (26 pos.)
Header Specification FCN-702P023-AU/M (Wire wrapping)
FCN-704P026-AU/M (Straight)
FCN-705P026-AU/M (Right Angle)
FCN-707J026-AU/B (Closed End)
FCN-707J026-AU/O (Through End)
A Cable
Specification 455-248-60 Spectra Strip
Zo = 100 10
28 AWG, 7 strands
B Cable
Specification 174-26 Ansley/3476-26 3M
Zo = 100 10 /Zo = 130 15
28 AWG, 7 strands
Secure the Unit
---------------
In installing the unit, it is important that an unit does not touch
any other hard parts such as mounting plate, etc. when operating as
well as non-operating (both storage and shipping).
Power Cable Connection
----------------------
This unit use the DC power source only. The following shows the
connector specification on the unit side, recommended specifications
on the cable side, and correspondence between pin assignment and
voltages. The connectors for the power cable consist of two 7P
connectors, while the cable side also requires two 7P connectors.
Specification on the unit side
Header C63L-0820-0008 (2420-07A-G manufactured by MOLEX) (7P) x 2
units
Recommended specifications on the cable side
Housing : MOLEX 2139-7
(7P) x 2 units
Contact : MOLEX 2478-GL
(12 units)
Key : MOLEX 2560-1
(2 units)
Pin assignment and voltages
(CN10) (CN9)
+-+++-+-+-+-+-+ +-+-+-+-+-+++-+
+-+++-+-+-+-+-+ +-+-+-+-+-+++-+
1 2 3 4 5 6 7 1 2 3 4 5 6 7
(CN10) (CN9) 1 0V (-12V RTN) 1 +5V 2 (Key) 2 +5V 3 0V (-12V RTN) 3 0V (+24V RTN) 4 -12V 4 0V (+24V RTN) 5 -12V 5 +24V 6 0V (+5V RTN) 6 (Key) 7 0V (+5V RTN) 7 +24V
NOTE
Use AWG 18 as the cable material
The cable length must be less than 1.5m
Also, if the power supply (option: B14L-5105-0100A) is used, the
following power cable is provided.
Specification: B660-0625-T327A
B660-1995-T041A (with DC Fan Unit)
Cable Termination
-----------------
In daisy-chain configuration, A-cable signals must be terminated at
the last disk drive with four module resistors. Four module-resistors
are attached with all disk drives, therefore four module-resistors
should be removed on the disk drive which the line termination is not
necessary. (A, B, C, D)
-----------------------------------------+
+-+--+
56 ohms | ++
+-----+ --+ | |CN2
9+ -+ |8 | | |
10+ -+- +7 | | |
11+ -+- +6 | | ++
12+ -+- +5 | +-+--+
13+ -+- +4 +-----+ +-+--+
14+ -+- +3 | | x | ++
15+ -+- +2 | +- DX | |
16+--+- +1 | x | |
+--*--+ --+ CX | |
x | |CN1
BX | |
x | |
AX | ++
CZFM PCB Assembly 1 +-+--+
-----------------------------------------+
System Grounding
----------------
This drive unit is uniformly grounded in the signal ground (SG). If
the FG and SG connection is required on the system, use the SG tap
at the back of the unit.
Also, the optional fan unit is grounded in the FG. In principle, the
SG (drive) is separated from the FG (fan unit) with the insulating
bushing when it is attached to the drive unit.
Connecting or disconnecting between FG and SG on the power supply
unit can be performed according to system power distribution and
system ground requirement.
Options
-------
Component name Specification Remarks
(Drawing No.)
Fan unit B03B-4740-E002A 100/115/120V AC; 50/60 Hz
Fan unit B03B-4740-E003A 220/240 V AC; 60 Hz
Fan unit B03B-4740-E005A +24V DC
Power supply
unit B14L-5105-0100A 100/115/120/220/240V AC
With connectors for feeding power to
fan units and dual channel printed
board unit.
Cable B660-1065-T006A Interface cable (A) 60P flat cable
Cable B660-1065-T008A Interface cable (B) 26P flat cable
Cable B660-1865-T020A Interface cable (A) for 2 units
daisy chain
Cable B660-1865-T030A Interface cable (A) for 3 units
daisy chain
Cable B660-1865-T040A Interface cable (A) for 4 units
daisy chain
Cable B660-1865-T050A Interface cable (A) for 5 units
daisy chain
Cable B660-1865-T060A Interface cable (A) for 6 units
daisy chain
Cable B660-1865-T070A Interface cable (A) for 7 units
daisy chain
Cable B660-1865-T080A Interface cable (A) for 8 units
daisy chain
Panel unit B03B-4595-E501A Flat key type control panel board
Mounting tray B21L-1810-0001A For mounting two units of 19 inch
rack with 3 pitches (inside frame)
Mounting tray B21L-1810-0002A For mounting two units of 19 inch
rack with 3 pitches, and the front
panel has the windows for operating
the panel unit.
Dual channel
PCB assembly B03B-4740-E401A To be mounted on optional PSU.
B03B-4740-E402A To be mounted on drive unit.
Power cable B660-0625-T327A Drive unit - power supply unit
connecting
Power cable B660-1995-T041A Drive unit and DC(+24V) Fan unit -
power supply unit connecting
Cable B660-0625-T328A E002A fan unit - power supply unit
connecting
Cable B660-0625-T335A E003A fan unit connecting
Cable B660-1995-T003A E501A panel unit - drive unit
connecting
Cable B660-0625-T329A Dual channel PCB assy.- Power supply
unit connecting.
NOTE
Items in the above table are optional and not fundamental components
of this unit. These items must be ordered separately conforming to
the above specifications as occasion demands.
Fan Unit
--------
The M2321/M2322 requires some means of cooling, since there is no
internal blower motor. For this purpose, optional fan units is
available. The fan unit is available in the event that adequate
cooling i snot provided within the mounting cabinet. This fan unit
is directly mountable onto the hind of the device, and be mounted
also at the field by using the existing screws and taps.
The fan unit may be ordered in any of the following voltage ratings: 100/115/120V AC, 220/240V AC or +24V DC. When the input power of the fan unit is supplied from the optional power supply unit, the fan unit could be ordered th etype for 100/115/120V AC (B03B-4740-E002A) regardless of system AC voltage. Moreover, DC fan unit (B03B-4740- E005A) is also useful with the optional power supply unit. In this case, power cable must be ordered following specifications: B660-1995-T041A.
Fan Unit Connector Part Number
Connector : AMP 1-480704-0
Contact : AMP 350550-1
19" Rack Mount Installation
---------------------------
Mounting-tray with brackets is possible to install two drives, side
by side in a 19" rack, three pitches. It can also accommodate the
the optional fan units and/or power supply units for each of the two
drive.
Features
FUJITSU M2321/M2322 OEM MANUAL B03P-4740-0101A...02, JAN. 1984
General Description
-------------------
This manual describes the Fujitsu 8-inch rigid disk drives M2321/
M2322. These units contain non-removable disks in sealed modules. A
rotary actuator using a closed loop servo performs head positioning.
These drives have floppy disk drive dimensions and can be mounted
horizonatally two drives wide in a 19-inch rack (with 3 pitch) or
mounted vertically in a system cabinet.
The contact start/stop (CSS) type heads and media are of the
Winchester technology type. These units feature high performance,
high reliability and low cost.
The M2321 and M2322 utilize the industry standard SMD interface,
thereby allowing the drives to be added to an existing disk
configuration.
By standardizing on this interface, development time for controllers
and software will be substantially reduced. Also fixed and variable
sector length formats are internally selectable.
To power the drives only DC voltages of +24, +5 and -12 volts are required, allowing for international versatility. Total nominal power cinsumption is less than 150 watts.
19" Rack Mount Installation
---------------------------
Mounting-tray (inner frame) guided by brackets (outer frame) can be
drawn out forward. (Travel distance is approximately 24").
NOTE
Mounting-tray (0001A) cannot accommodate the drive unit with Panel
unit. In that case, 0002A-type must be specified.
Error Rate
----------
The following error rates assume that the M2321/M2322 is beeing
operated within specification. Errors caused by media defects or
equipment failures are excluded.
Read Errors
-----------
Prior to determination of a read error rate, the data shall have been
verified as written correctly and all media defects flagged.
1. Recoverable Error Rate
A recoverable read error is one which can reading on track, and
should not exceed ten per 10(11) bits.
2. Unrecoverable Error Rate
An unrecoverable read error is one which cannot be read correctly
within sixteen retries and should not exceed ten per 10(14) bits.
Positioning Error Rate
----------------------
The positioning error which can be corrected within one retry should
not exceed ten per 10(8) seeks.
Media Defects
-------------
A media defect is defined as a repeative read error that occurs on
a properly adjusted drive within specific operating conditions.
Valid data must not be written over known media defects, therefore,
sector/track deallocationor skip displacement techniques must be
utilized.
1. Media Defect Characteristics
a. The maximum number of defects per drive is as follows:
M2321K (84MB): TBD
M2322K (168MB): TBD
b. The maximum number of defective tracks per drive is as
follows:
M2321K (84MB): TBD
M2322K (168MB): TBD
A defective track is defined as a track having any of the
following:
1. Two or three defects
2. Defective logging areas
NOTE
No track shall have more than three defects.
2. Media defect free areas are defined as follows:
1. Cylinder 0, Head 0 through 2
2. Any error in logging area to extent defined in the Media
Defect Format.
Media Defect Information
------------------------
All MDD will have a Media Defect List which will list the following
information.
1. Cylinder Address
2. Head Address
3. Position (bytes from Index 1 byte)
4. Length (bits 1 bit)
The above information will be listed by hexadecimal code. The
maximum media defect length at a defect is 64 bytes (512 bits).
Media Defect Format
-------------------
The MDDs will be formatted at the factory with standard Media Defect
Format. The Media Defect Format is divided into two parts. The first
part is a hard-sectored format and is normally included in the first
56 bytes following Index signal. The second part is a soft-sectored
format and is normally included in the next 49 bytes following Index
signal.
Disk Platters
-------------
The M2321 and M2322 disk drives contain three and four platters,
respectively. These platters are 200 mm (eight-inch) diameter
aluminium substrate-coated disks with a lubricated iron oxide
coating. The bottom side of the lowest disk is pre-written at the
factory with reference servo patterns. The platter surface can
sustain 10,000 start/stops without damage.
Data Heads
----------
The heads are in contact with the media surface when the platters
are not rotating, and they lift-off with rotation. A landing zone is
provided out of the data area which is use when the heads contact the
media. Five heads are used in the M2321 and ten in the M2322.
Panel Unit
----------
The panel unit includes function lights which indicate power on,
ready, write protect, check, and also includes a write protect
switch.
When the panel unit is used in the Mounting-tray (B21L-1810-0002A),
the type panel unit B03B-4590-E501A must be ordered.
Cables
------
The interface cable (A) i sup to 30m long (to the drive unit at the
final step in case of daisy chain mode). The length of the cable can
be specified in every 20 inches (508mm).
The interface cable (B) is up to 15m long. The length of this cable
can be specified in every 500 mm.
Air Circulation in DE
---------------------
As the Contact Start/Stop (CSS) head used in this disk unit has a
very low flying height (approximately 0.35 m), head crashes could
caused by microscopic foreign particles. To keep the inside of the DE
clean, this enclosure is completely sealed and clean air is supplied
through two filters. The breather filter is used for external air
intake, while the recirculation filter is used to keep the air inside
the DE clean.
Printed Circuit Boards
----------------------
Three PCBs are mounted on both the topside and the backside of the
M2321/M2322 micro disk drives. They are easily removed by unplugging
the connectors and removing the screws securing the PCBs to the
chassis. The basic functions performed on the PCBs are as follows:
a. SMD Interface is enabled/disabled by the controller using the
drive select function, thus allowing up to eight drives to be
daisy-chained together.
b. Drive Status such as On Cylinder, Fault, Seek Complete, Write
Protect, Index and Ready are made available to the interface.
c. Read/Write control includes conversion of NRZ interface write
data to MFM coding. When the drive is instructed to read, the
head select circuit decodes the selected head and the MFM data is
converted back to NRZ for transmission to the controller.
d. Servo Control circuits take the Cylinder Address command from the
interface and control the seek operation to any desired cylinder.
e. Spindle Speed control circuits monitor the speed of the spindle/
drive motor and maintain 3,600 RPM 1%.
Format Control
--------------
The Record Format is controlled by the control unit. The Index and
Sector signals are used to indicate the beginning of a track and
sector by the control unit.
Some disk drive dependent constrains must be recognized to
accomplish a format. The following is a list of those format
parameters:
1. Gap 1 Tolerance
This tolerance is required for conventional disk pack/cartridge
drive, in MDD M2321/2322 is not required, however, this tolerance
must be provided to allow for head selection or read-after-write
transient.
2. VFO Fast Synchronization
The synchronization time required to allow Variable-Frequency-
Oscillator (VFO) to synchronizes is 11 bytes minimum before
Synchronous Patterns of address field and data field.
3. Write Driver Turn On Time
The Write Driver Turn on time is approximately 800 ns (8 bits).
This time has to be accounted for in order to know write splice
locations.
4. Synchronous Byte
Synchronous Byte is one-byte field containing non-zero pattern to
identify the beginning of the address field and data field of
record. The pattern is 0E (hexadecimal) for address field and 09
(hexadecimal) for data field.
5. End-Of-Record (EOR) Pad
This tolerance is a one-byte of zeros to allow the internal
encoding delay time during write operation.
6. Gap 3 Tolerance
Gap 3 is 4-byte minimum of zeros to prevent the write turn-off
transient and write/read encoding/decoding delay time.
7. Head Select Transient
The control unit must provide a 5 s minimum delay time between a
head select and initiating a read gate. Normally this delay time
will be provided by adding zeros within Gap 3 and/or Gap 1
depending the control unit function.
8. Read-after-Write Transient
The control unit must provided a 10 s minimum delay time between
the trailing-edge of a write gate and the leading-edge of a read
gate.
Normally this delay time will be provided by adding zeros within
Gap 3 and/or Gap 1 depending on the control unit function.
9. Read/write Encoding/Decoding Time
The NRZ write data is encoded into MFM write data pulse and
written on the specified record during write operation. The MFM
read data pulse is decoded into NRZ read data and then sent to the
control unit during read operation. Through encoding and decoding
circuitry, a read data signal will be delayed by approximately
one-byte against a write data.
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