T M 2 6 2 TANDON NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/HH Cylinders 615| | | Capacity form/unform 21/ 25 MB Heads 4| | | Seek time / track 80.0/ 3.0 ms Sector/track 17| | | Controller MFM / ST506 Precompensation 65535 Cache/Buffer KB Landing Zone 663 Data transfer rate 0.625 MB/S int Bytes/Sector 512 0.625 MB/S ext Recording method MFM operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 4 50 | -40 60 Power: sleep W Humidity % 8 80 | 8 80 standby W Altitude km -0.457 2.972| -0.457 12.195 idle 10.0 W Shock g 10 | 40 seek W Rotation RPM 3568 read/write W Acoustic dBA spin-up W ECC Bit - MTBF h 15000 Warranty Month Lift/Lock/Park NO Certificates CSA,UL1950 ********************************************************************** L A Y O U T ********************************************************************** TANDON TM362/TM262 PRODUCT SPECIFICATION AND USER'S MANUAL 1985 +---------------------------------------------------------+ 1 | |XX | |XX J1 | +1 |XX | Terminator| |XX | Resistor || |XX | || |XX | ++ |XX | W1+--+ | | Drive W2| | |XX1 | Address W3| | |XX J2 | W4| | |XX | W5| | |XX | +--+ |XX | |XX | | 1 | +---J3XX | +-----XX +---------------------------------------------------------+Power ********************************************************************** J U M P E R S ********************************************************************** TANDON TM362/TM262 PRODUCT SPECIFICATION AND USER'S MANUAL 1985 Jumper Setting ============== Drive Address Jumper -------------------- W1 Drive Select 0 +--------+ +--------+ +--------+ W2 Drive Select 1 ++++++++++ ++++++++++ ++++++++++ W3 Drive Select 2 xx W1 xx W2 xx W3 W4 Drive Select 0 | W5 Radial Configuration +--------+ +--------+ Jumper ++++++++++ ++++++++++ xx W4 xx W5 | | Jumper Jumper The drive address option allows the user to daisy chain up to four drives, and to enable one drive at a time. Drive Select is implemented by shorting one of the four connections, using the Drive Select Jumper. The W5 location is used for radial configurations. The drive is selected at all times with the W5 jumper installed. If jumper configurations are changed, power should be cycled off and on, so that the microprocessor can recognize the new configuration. Terminator Resistor ------------------- The terminator resistor pack, located on the +--------+ logic circuit board should be installed in the |********| ^ last drive of the daisy chain. All other +--------+ | drives on the interface must have the ++++++++++ resistor pack removed. For a radial configura- +--------1 tion, all drives should have the terminator resistor pack installed. ********************************************************************** I N S T A L L ********************************************************************** TANDON TM362/TM262 PRODUCT SPECIFICATION AND USER'S MANUAL 1985 Notes on Installation ===================== Installation direction ---------------------- horizontally vertically +-----------------+ +--+ +--+ | | | +-----+ +-----+ | | | | | | | | | +-+-----------------+-+ | | | | | | +---------------------+ | | | | | | | | | | | | x x | | | | | | +------x------x-------+ | +-----+ +-----+ | +-+------x--x-------+-+ +--+ +--+ | xx | | x x | +---x--------x----+ x x Mounting the Drive ------------------ The drive can be mounted in any vertical or horizontal plane. On the TM362, eight 6-32 tapped holes are provided for mounting: two on each side and four on the bottom of the frame. On the TM262 twenty-four 6-32 tapped holes are provided for mounting: eight on each side and eight on the bottom of the frame. The drive is manufactured with some critical internal alignments that must be maintained. Hence, it is important the mounting hardware does not introduce significant stress on the drive. Any mounting scheme in which the drive is part of the structural integrity of the enclosure is not permitted. Mounting schemes should allow for adjustable brackets or incorporate resilient members to accommodate tolerances. A sway space is required between the head disk assembly and other assemblies in the user system to allow for movement of the housing on its shock mounts 0.060 inces minimum. Daisy Chain/Radial Capability ----------------------------- The circuit board provides address selection and gating functions that allow a user to daisy chain up to four drives or configure the drive for radial connection. A SIP resistor pack is used to terminate the interface. The resistor pack is removed from its SIP socket on all drive except the last one in a daisy chain. When a single-drive system or a radial configuration is used, the resistor pack remains plugged into the SIP socket. Both drives are compatible with controllers that use an ST506/412 industry standard interface. Front Panel ----------- Front panels equipped with an activity indicator are available for each of the drives. Air Filtration -------------- A self-contained, recirculating air filtration system supplies clean air through a 0.3-micron filter. A secondary breather filter is provided to allow pressure equalization with the ambient atmosphere without contamination. The entire head-disk-actuator compartment is maintained at a slightly positive pressure to further ensure an ultraclean environment. Interface Connectors -------------------- The electrical interface between the drive and the host system is via three connectors. J1 provides control signals for the drive. J2 provides for the radial connection of read/write data signals. J3 provides for D.C. power. J1/P1 Connector --------------- Connection to J1 is through a thirty-four-pin circuit board connector. The pins are numbered 1 through 34. The even pins are located on the solder side of the circuit board. A key slot is provided between Pins 4 and 6. The recommended mating connector for P1 is AMP ribbon connector P/N 88383-3, without ears. J2/P2 Connector --------------- Connection to J2 is through a twenty-pin circuit board edge connector. The pins are numbered 1 through 20. The even pins are located on the solder side of the circuit board. The recommended mating connector for P2 is AMP ribbon connector P/N 88373-3, without ears. A key slot is provided between Pins 4 and 6. J3/P3 Connector --------------- D.C. power connector J3 is a four-pin AMP Mate-N-Lok connector, P/N 1-480426-0. The recommended mating connector, P3, is AMP P/N 1-480424-0, utilizing AMP pins P/N 60619-4. J3 pins are labeled on the J3 connector. J3 cabling must be 18 AWG minimum. Interface Line Descriptions --------------------------- The interface for the TM362 and TM262 drives is avilable in one configuration. It is compatible with ST506/412 indutry standard drives. Compatibility is defined as using the same pin assignment where the signal and function are common. The interface may be connected in the radial or daisy chain configuration. ********************************************************************** F E A T U R E S ********************************************************************** TANDON TM362/TM262 PRODUCT SPECIFICATION AND USER'S MANUAL 1985 Introduction ------------ This manual provides useful information to assist the customer when incorporating the Tandon rigid disk drive into a system. The TM362 and TM262 disk drives are full feature, compact units that use a pseudo-closed-loop head positioning system in conjunction with standard Winchester technology to store data on 3.5-inch plated media. Voltage and signal requirements for both drives are identical to those of Tandon Corporation's standard 5-1/4-inch family of rigid disk drives. Frame size is the only difference between the TM362 drive and the TM262 drive. The TM362 is designed to fit in a standard 3.5-inch cavity, and the TM262 is designed to fit in a standard 5-1/4-inch drive cavity. The storage media is contained within the drive in a fixed, non- operator-removable configuration. Purpose of the Drive -------------------- These drives are rotating disk memory devices designed for random access data storage and retrieval. Typical applications include word processing systems, entry level microprocessor systems, intelligent calculators, program storage, small business computer systems, and any application in which low cost, high speed random access data storage is required. Microprocessor Control ---------------------- The TM362 and TM262 drives feature an onboard microprocessor, providing five major functions: 1. Self-calibration on power-up. 2. Seek timing for the head positioning mechanism. 3. Write current switching for optimal data recording quality. 4. Power and track fault detection. 5. Compensation for positioning errors caused by temperature and mechanical variations. Functional Description ---------------------- The functional characteristics of the TM362 and TM262 drives are identical. The drives are fully self-contained and require no operator intervention during normal operation. During the power-up sequence, the spindle motor reaches 3,568 RPM, and the positioning mechanism recalibrates the recording heads back to Track 0. If the spindle motor does not up to speed within 15 seconds, the drivers to the spindle motor will be turned off. A new power up sequence will be attempted when the power is momentarily removed and then restored. The drives are designed to optimize MFM write and read data recording methods, as specified by the ST506/412 interface. Data recovery electronics include a low-level read amplifier, differentiator, a zero-crossover detector, and digitizing circuits. No data encoding or decoding features are provided on the drives. The heads are positioned over the desired track by means of a stepper motor and a rack and pinion mechanism. Servo positioning pulses are recorded on the final segment of each Head 0 track, and, by continuously monitoring the location of the heads in relationship to those pulses, the drive is able to maintain highly accurate servo positioning. The onboard microprocessor monitors all functions that could affect drive performance. If a problem exists, the drive will abort its power sequence or (after achieving a Ready state) declare a fault condition. A parking zone is provided for the read/write heads at cylinder 663. The parking function is under the control of the drive controller. Seek Time --------- +----------------------------------+--------+ | |362/262 | +----------------------------------+--------+ |Track-to-Track msec. typ. | 3 | +----------------------------------+--------+ |Average msec. typ. | 80 | | msec. max. | 195 | +----------------------------------+--------+ |Head Settling Time msec. | 15.0 | +----------------------------------+--------+ |Latency msec. avg. | 8.41 | +----------------------------------+--------+ Power Sequencing ---------------- No power sequencing is required. The microprocessor starts the spindle motor when both voltages are present. Soft and Hard Read Error Rates, Exclusive of Media Defects ---------------------------------------------------------- For data that has been verified previously as error free, and when used in conjunction with a data separator and phase lock loop of good design, the recoverable (soft) error rate for any subsequent read operation shall not exceed one error in 1 x 10(10) bits transferred. A recoverable read error is an error that may be corrected within five attempts to reread the data. The nonrecoverable (hard) read error rates shall not exceed one error in 1 x 10(12) bits transferred. A nonrecoverable read error is an error that may not be corrected within five attempty to reread data, providing that the writing of the data previously has been verified as correct. The seek error rate is not exceed one error in 1 x 10(6) seeks. Media Defects ------------- Any defects on the media surface will be identified on a defect map provided with each drive. This defect map will indicate the head number, track number, and the number of bytes from index for each defect. Each defect shall be no longer than 16 bits. Cylinders 000 and 001 are guranteed error free. The defect map is offered as a guide only. The number of defects and their locations can change due to customer system variations, such as data separators. NOTE A parking track is located at cylinder 663, to reduce the probability of damage to data tracks during extreme shock conditions. Mean Time Between Failures 15,000 power on hours Mean Time To Repair 30 minutes Component Design Life 5 years Preventative Maintenance Not Required Dust Cover ---------- The design of an enclosure should incorporate a means to prevent contamination from loose items (e.g. dust, lint, and paper chad) since the drive does not have a dust cover. Write precompensation --------------------- Tandon does not recommended write precompensation.