M 2 3 2 2 K FUJITSU NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 8"/FH Cylinders 823| | | Capacity form/unform / 168 MB Heads 10| | | 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 ********************************************************************** L A Y O U T ********************************************************************** 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 ********************************************************************** J U M P E R S ********************************************************************** 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 ********************************************************************** I N S T A L L ********************************************************************** 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. ********************************************************************** F E A T U R E S ********************************************************************** 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.