N D - 1 2 4 0 S D NEWBURY DATA NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 3.5"/HH Cylinders 2389| | | Capacity form/unform 1240/ 1524 MB Heads 15| | | Seek time / track 8.5/ 1.8 ms Sector/track | | | Controller SCSI2 DIFFERENTIAL Precompensation Cache/Buffer 256 KB Landing Zone Data transfer rate MB/S int Bytes/Sector 512 10.000 MB/S ext SYNC Recording method RLL 1/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 5 55 | -40 65 Power: sleep W Humidity % 5 95 | 5 95 standby W Altitude km -0.305 3.048| -0.305 3.048 idle W Shock g 3 | 50 seek W Rotation RPM 6300 read/write 21.0 W Acoustic dBA 35 spin-up W ECC Bit 88,REED SOLOMON MTBF h 300000 Warranty Month Lift/Lock/Park YES Certificates CSA,FCC,IEC380,IEC950,TUV,... ********************************************************************** L A Y O U T ********************************************************************** MAXTOR MXT-1240S OEM TECHNICAL MANUAL 1028044 REV. A +---------------------------------------------------------+ | JP5+--+ +-+JP4 +-----+J7 JP8 |XX | | | +-+ 1-----+ +---+ ++ |XX |+-+ +--1 +---+ || |XX || |J4 RN2|| |XX |+-+ || |XX |+-+ +--+JP2 +1 |XX J1 || | +--1 ++ |XX || |J2 RN1|| |XX || | || |XX || | +-+JP1 || |XX || | +-+ +1 |XX |+-+ +J6----+ |XX | 1------+ |XX | +-+ |X1 | | |J5 | | +-+ |XX Power | |XX +---------------------------------------------------------+ Tailgate PCB for Differential SCSI /--------------DRIVE------------------------------------- / / | / / | +--------------------------------------------------------+ | | XXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX | | | 4 Pin male DC Male SCSI on Drive PCB | | | connector on Drive PCB | | | +-------------------------------------------+ | | 4 female DC connector +----------------------------+Female|SCSI on XXXXXXXXX | +----------------------------+back side of | | | | | | tailgate PCB | +--+-+-+-+----+ | | / | ++-+-+-++ | | / | +-------+ +---JP1 | |/ | | |SCSI ID +-+ | +---+ | | | | | | J4 J3 | | XXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX | +---------------------------------------------------------+ Male Connector Male SCSI Connector to SCSI Bus for Power Supply ********************************************************************** J U M P E R S ********************************************************************** MAXTOR MXT-1240S OEM TECHNICAL MANUAL 1028044 REV. A Jumper setting ============== x = Jumper set at factory J3 Power Connector ------------------- ----+------------+ pin 1 +12 VDC | 4 3 2 1 | pin 2 +12 Volts Return ----+------------+ pin 3 + 5 Volts Return pin 4 + 5 VDC J4 Service Connector Pin Assignment ------------------------------------ ----+------+------+------+------+------+---PCB |Pin 2 |Pin 4 |Pin 6 |Pin 8 |Pin 10| |CNMI |DTR |GND |SPDL |-LED | | | | |Pu.REF|DRV | +------+------+------+------+------+ |Pin 1 |Pin 3 |Pin 5 |Pin 7 |Pin 9 | |GND |DTX |GND |N/C |+ 5V | | | | | | | +------+------+------+------+------+ When an LED is connected to pins nine and ten, it functions in the same manner as the LED which is mounted on the disk drive's face- plate. This is typically used in cases when the drive is mounted in a position where the LED is not visible or the faceplate is removed. Pins three (transmit data, DTX) and four (receive data, DTR) are the main communication lines. Pin two is for factory use only. Pins five and six are signal ground lines. Pin eigth is used to synchronize the spindles in multiple drive applications. J6 SCSI ID Setting ------------------- +----------+ | 9 7 5 3 1| |10 8 6 4 2| +----------+ +--------+----------+-------+-------+-------+ |SCSI ID | Priority | 5 & 6 | 3 & 4 | 1 & 2 | +--------+----------+-------+-------+-------+ | 0 | Lowest |OPEN |OPEN |OPEN | | 1 | . |OPEN |OPEN |CLOSED | | 2 | . |OPEN |CLOSED |OPEN | | 3 | . |OPEN |CLOSED |CLOSED | | 4 | . |CLOSED |OPEN |OPEN | | 5 | . |CLOSED |OPEN |CLOSED | |x 6 | . |CLOSED |CLOSED |OPEN | | 7 | Highest |CLOSED |CLOSED |CLOSED | +--------+----------+-------+-------+-------+ (MSB) (LSB) SCSI ID jumpers (pins one through six on J6) are provided to con- figure each disk drve with a SCSI device ID for use in multiple SCSI device configurations. An ID of seven is the highest priority in a multiple device configuration, and is usually used by the initiator. The disk drive is shipped from the factory with an ID of six. This assures that sufficient jumpers are available for any address except seven, which is usually reserved for the host system. J6 Parity --------- x 7-8 CLOSED Enables Parity detection OPEN Disables Parity detection Parity detection can be disabled by removing the jumper from pins seven and eight of J6. Odd parity detection is incorporated by the disk drive. Odd parity is always generated. J6 Drive Spin-Up Options (spin with power) ------------------------------------------- x 9-10 CLOSED Start when power is applied OPEN Wait for START Command Wait for START Command: With no jumper pins nine and ten of J6, the disk drive does not spin up until the initiator issues a START/STOP UNIT (1Bh) command with the start bit set to one. Start When Power is Applied: When pins nine and ten of J6 are jumpered, the motor starts as soon as power is applied. The disk drive is shipped in this configuration. J7 Single Ended or Differential -------------------------------- Single Ended Differential +---+ +---+ 12|o o|11 12|xxx|11 10|o o|9 10|xxx|9 8|o o|7 8|xxx|7 6|o o|5 6|xxx|5 4|xxx|3 4|o o|3 2|o o|1 2|xxx|1 +---+ +---+ xxx = CLOSED The SCSI bus signals may be either single ended or differential. If a single ended signal is desired, configure J7 so that pins 3 and 4 are jumpered and all other pins are not. JP1 +-----------------+ SCSI ID on Tailgate PCB, Differential |6 o o 5 (MSB)| |4 o o 3 | |2 o o 1 (LSB)| +-----------------+ If a differential signal is desired, an optional "tailgate" PCB must be added to the drive. The tailgate PCB must have JP1 configured for the same ID as the disk drive. Additionally J7 (drive PCB) must have jumpers on pins 1 and 2, 5 and 6, 7 and 8, 9 and 10, and 11 and 12, while pins 3 and 4 should not have a jumper. JP2/JP4/JP5 Test ----------------- JP2, JP4 and JP5 are used during the manufacturing process for testing. After testing, the disk drive is shipped with JP4, the write protect jumper, installed, which write enables the drive. Removal of this jumper write protects the drive. JP8 Terminator Power Selection ------------------------------- x CLOSED Terminator Power to the SCSI bus is protected by a fuse (1A) installed on the PCB. OPEN The drive is prevented from supplying termination power to the SCSI bus. Power to the terminators may come internally from the disk drive or externally from the SCSI bus. The drive electronics are capable of sensing if the host is providing power to the terminators. If the host is not providing power, the disk drive automatically provides power to the terminators via a regulated (active) power source. The function of JP8 is the same for the single ended and differential versions. ********************************************************************** I N S T A L L ********************************************************************** MAXTOR MXT-1240S OEM TECHNICAL MANUAL 1028044 Notes of Installation ===================== Installation direction ---------------------- horizontally vertically +-----------------+ +--+ +--+ | | | +-----+ +-----+ | | | | | | | | | +-+-----------------+-+ | | | | | | +---------------------+ | | | | | | | | | | | | | | | | | | +---------------------+ | +-----+ +-----+ | +-+-----------------+-+ +--+ +--+ | | | | +-----------------+ The drive will operate in all axis (6 directions). Drive Orientation ----------------- The drives may be mounted on any axis. Certain switching power supplies may emanate electrical noise, which can degrade the specified read error rate. For best results, orient the drives so that the PCB assemblies are not adjacent to these noise sources. Twelve mounting holes, four on the bottom and four on each side, are provided for mounting each disk into an enclosure. The size and location of these holes are identical industry standards. Caution: Mounting screw lengths must be chosen so that no more than 0.125 inch of the screw is available to enter the frame mounting hole. The PCB must have clearance. The torque applied to the mounting screws should be between 4 and 6 inchpounds. Air Flow Requirements --------------------- It is recommended that air flow over the PCB have a minimum velocity of 3.6 feet (1.1 meters) per second. Air Filtration System --------------------- The disks and read/write heads are assembled in a Class 100 environ- ment and then sealed within the HDA. The HDA contains an absolute filter, mounted inside the casing, to provide internal air filtration. Initiator-Target Configurations ------------------------------- The SCSI interface offers a number of unique advantages which facilitate the interconnection of the disk drive with one (or more) computer systems. Unlike traditional microcomputer disk interfaces, such as ST506 or ESDI, SCSI supports multiple peripherals and different peripheral types, all operating on the same bus structure. Single Host, Single Device -------------------------- +------------+ +-----------+ | HOST x+-----------xxxx------------+x SCSI | | SYSTEM +-----------xxxx------------+x DEVICE | +------------+ 50-Pin +|----------+ Ribbon Cable | Terminator packs Multiple Host, Multiple Device (Single Ended Version) ------------------------------ +------------+ +-----------+ | HOST x+---------------------------+* SCSI | | SYSTEM +--+ +------------------+ +-+* DEVICE 1| +------------+ | | | | +|----------+ | | | | | Terminator packs | | | | Removed | | | | +------------+ | | | | +-----------+ | HOST x+--+ | | +-+* SCSI | | SYSTEM +----+ | +-+* DEVICE 2| +------------+ | | +|----------+ | | | Terminator packs | | Removed | | | | +-----------+ | +-+x SCSI | +---+x DEVICE 3| +|----------+ | Terminator packs Installed The MXT-1240S also supports multiple initiator configurations consistent with the established arbitration cycle outlined in the SCSI standards. Configuration changes are made by SCSI address jumpers, which are set when the drive is installed in the system. The SCSI implementation used in the disk drive is intended to facilitate high-speed data transfers between the initiator and the drive. Interconnection between the initiator system(s) and the drive is via a fifty-pin ribbon cable. The drive may be configured as either single ended or differential. Interface Termination --------------------- Single Ended SCSI devicesrequire proper interface termination. The first physical device and the last physical device on a SCSI bus daisy chain must be terminated. Remove the terminators from any devices in between. For instance, if a disk drive is in the middle of a SCSI bus daisy chain, remove its terminators. The terminator resistor pack's pin one is marked with a dot, or other suitable marking, on the terminator. Note that the PCB's hole for pin one has a square outline. Also, note that pin one is always the closest pin to the power connector, J3. Note: Both terminator packs (RN1 and RN2) must be oriented with the dot (pin one) toward J3 for the disk drive to work properly. As shipped, the interface signal lines are terminated with two re- movable 1000 ohm resistor network packs supplied with an active voltage source of 2.85 volts. Resistor tolerances in the terminator network should be 5% or less. The devices driving the dis drive inputs should be open collector devices capable of sinking at least 48 milliamps at a voltage level of less than 0.5 volts DC (7438 or equivalent). Devices receiving the disk drive outputs should be of a SCHMITT trigger type to improve noise immunity (74LS14, 74LS240, or equivalent). The initiator should not load the bus with more than one standard low power Schottky transistor-transistor logic (LSTTL) load per input line, and should terminate all input signals with 100 ohm terminators with a regulated 2.85 volt power source. Differential With the installation of the optional "tailgate" PCB, RN1 and RN2 must be changed from the factory installed 110 ohm value to a higher, 1,000 ohm value. Note: The RN1 and RN2 terminator packs are "ultra-low profile" (maximum 3.5mm). Suggested vendors and part numbers are: 1) Panasonic EXBU10E102G and 2) Kyocera TRDSA10PC102GA. Spindle Synchronization ----------------------- The MXT-1240S disk drives are able to synchronize their spindles together for use in disk drive arrays. This is accomplished by having all drives in the array synchronized to a common pulsed index signal. This synchronous signal can be provided by either an external source or a master drive and can be transceived on the service connector (J4 pin 8). If the sync pulses are to be supplied by a drive, only one drive in an array may transmit it. All other drives will receive the sync pulses and synchronize their index pulses to it. The configuration for the synchronized-spindle bus is a twisted pair cable, daisy-chained from the master to each slave drive. This twisted pair cable is connected to the Service Connetor (J4) on each drive. The mating connector is a Dupont part number 69764-010 or Berg part number 6976410. The number of drives that can be attached to the array depends on the length of the bus connecting each drive to the source of the sync signal and the amount of current supplied by the terminating resistor. If the MXT-1240S drive is the signal source, it can sink 15 mA. The maximum cable length is 3 meters. The source of the reference pulse must be at the far end of the transmission line, opposite the 2K ohm terminating resistor, which is between the signal and +5V. Note: The terminating resistor must be supplied by the user as part of the cable. System Cabling With One Drive in Master Mode -------------------------------------------- +OPTIONAL-+ +---------+ +---------+ +---------+ +---------+ |External | |Disk | |Disk | |Disk | |Disk | |Pulse | |Drive | |Drive | |Drive | |Drive | |Source | |MASTER | | | | | | | + + - - + + +-+-----+-+ +-+-----+-+ +-+-----+-+ +-+-----+-+ + - - + +6-8-9+ +6-8-9+ +6-8-9+ +6-8-9+ | | | | | | | | | | 2K | + - - - -+ o---------+-o----SPDL-+-o---------+-o- + - - - - - o--Twisted--o-pair------o-cable--GND+ After power is reset, the drive will be in an independent spindle mode, not configured for either a MASTER or SLAVE mode. Each drive must be configured for the appropriate mode of operation. This configuration is accomplished via a MODE SELECT command with Page 04h setting the RPL bits in byte 17, bits 0 and 1. The master drive will generate the spindle-synchronization sync pulses with the slave drives to receive the sync pulses. The connection between drives for the sync reference pulse, is a bi-directional line. The master can be either the host, a drive, or an external signal source which generates the sync reference pulse. J1 SCSI Connector ------------------ The MXT-1240S communicates with an initiator system via a fifty-pin connector, J1. Pin one is located on the end of J1 closest to the DC power connector, J3. J3 Power Connector ------------------ The four-pin DC power connector J3, is similar to AMP's MATE-N-LOCK connector part number 350543-1. J3 however, is surface mounted to the PCB rather than freehanging as the AMP part is. The recommended socket housing that is compatible with connector J3 is AMP part number 1-480424-0. The recommended female sockets that are compatible with connector J3 are AMP socket part numbers 350078-4 (strip) or 61173-4 (loose piece). J4 Service Connector -------------------- Connector J4 is a 10-pin service connector provided for serial input, the synchronous spindle, and LED source current. Its mating connector is a Berg 6976410 part. ********************************************************************** F E A T U R E S ********************************************************************** MAXTOR MXT-1240S OEM TECHNICAL MANUAL 1028044 REV. A Drive Mechanism --------------- The HDA is a sealed subassembly containing the mechanical portion of the disk drive. A brushless DC motor contained within the spindle hub rotates the spindle and is controlled by a dedicated microprocessor. Shock mounting is provided internally in the HDA and externally at vibration isolators to minimize transmission of vibration through the frame. The frame is the mechanical assembly holding the HDA and PCB. Sector Size ----------- The disk drive is shipped from the factory formatted with a default size of 512 bytes. Sector sizes of 514, 520, and 1,024 bytes are also supported. Error Conditions ---------------- When the drive fails to achieve synchronization, a UNIT ATTENTION condition with an Additional Sense Code (ASC) of 06h with an Additional Sense Code Qualifier (ASCQ) of 5Ch (RPL status change) will be posted. Additionally, if subsequent to achieving synchronization, the drive detects a loss of synchronization and no I/O operation is beeing executed, a check condition of UNIT ATTENTION with RPL status change will be posted. Error Correction ---------------- The MXT-1240S disk drive contains an 88-bit Reed Solomon error correction code which is non-interleaved. Different than the Maxtor ECC implementations, this error correction code resides in the hard- ware within the Cirrus SH-450 SCSI controller IC. This allows for "in-line" or "on the fly" correction of single burst errors up to 11 bits in length without any mechanical delays or interruption of data. Additional error correction capability for double burst or greater than 11-bit errors resides in the firmware or "off-line" and is invoked as part of the error recovery algorithm. The 88-bit ECC, both hardware and firmware correction codes, provides increased error correction capability, thus allowing a significant improvement in both the recovered and unrecovered error rates along with a very low miscorrection probability. Seek Time --------- |MXT1240S| ----------------------------------+--------+ Single Track Read msec. | <1.5 | Write msec. | 2.0 | Average Seek msec. | 8.5 | To Read msec. | 8.5 | To Write msec. | 9.5 | Full Stroke msec. | 20.0 | Latency msec. avg. | 4.76 | ----------------------------------+--------+