M 1 0 0 6 MINISCRIBE NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/FH Cylinders 306| | | Capacity form/unform 5/ 6 MB Heads 2| | | Seek time / track 99.9/ ms Sector/track 17| | | Controller MFM / ST412 Precompensation 128 Cache/Buffer KB Landing Zone 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 46 | 57 Power: sleep W Humidity % 8 80 | 8 80 standby 22.7 W Altitude km | idle W Shock g | seek W Rotation RPM 3600 read/write W Acoustic dBA spin-up W ECC Bit MTBF h 8000 Warranty Month Lift/Lock/Park NO Certificates ********************************************************************** L A Y O U T ********************************************************************** MINISC. 1006/1012 PRODUCT MANUAL MSI/002/981 +---------------------------------------------------------+ | |XX | Shunt--+ |XX | | | |XX J1 | | | |XX | +--1 |XX | |XX | |XX | +-+ | | Terminator | | | | | |XX Power | | | |XX J3 | +-1 | | |XX | |XX | |XX J2 | |XX | |XX +---------------------------------------------------------+ ********************************************************************** J U M P E R S ********************************************************************** MINISC. 1006/1012 PRODUCT MANUAL MSI/002/981 ISSUE 0 Jumper Setting ============== Drive Selection --------------- As shipped, the 16-pin shunt block has all pin pairs shorted with the "Radial" option selected. To select the desired drive number in a daisy-chain operation, refer to the following table. Drive select number Pin Pair 1 2 3 4 --------------------------------------------- 8 - 9 CLOSED OPEN OPEN OPEN 7 - 10 OPEN CLOSED OPEN OPEN 6 - 11 OPEN OPEN CLOSED OPEN 5 - 12 OPEN OPEN OPEN CLOSED 1 - 16 OPEN OPEN OPEN OPEN Radial Option ------------- As shipped, the 16-pin shunt block has pin pair 1/16 shorted result- ing in a radial operation. In this case, all input and output signals are enabled, even if the drive is not selected. However, the front panel LED will not be on. -DRIVE SELECT must be active to light the LED. When pin pair 1/16 is open the drive is in a daisy chain mode where output signals are active when the appropriatte -DRIVE SELECT line is activated. Half Step Option ---------------- As shipped, the 16-pin shunt block has pin pair 4/13 shorted. In this case, step pulses are applied to the interface at an interval of 1.75 milliseconds. Openin gpin pair 4/13 alloes a significant decrease in access time when used in conjunction with the simple software algorithm provided by the controller. Controller Reset Option ----------------------- As shipped, the 16-pin shunt block has pin pair 3/14 shorted. In this case -WRITE FAULT conditions cannot be reset by the controller. Opening pin pair 3/14 allows the controller to reset -WRITE FAULT by deselecting the drive. This function is valid whether or not the "Radial" option is selected. Terminators ----------- Each drive is shipped with a terminator pack providing the 220/330 ohm termination for the Control Input Signals. If multiple drives are configured, the terminator pack must be removed from all drives except the last unit on the daisy chain. ********************************************************************** I N S T A L L ********************************************************************** MINISC. 1006/1012 PRODUCT MANUAL MSI/002/981 ISSUE 0 Installation routines ===================== Drive mounting -------------- horizontally vertically +-----------------+ +--+ +--+ +------------------+ | | | +-----+ +-----+ | | | x | | | | | | | | x+----------------+x +-+-----------------+-+ | | | | | | ||x x|| +---------------------+ | | | | | | || x x || | | | | | | || x x || x x | | | | | | || x x || +------x------x-------+ | +-----+ +-----+ | || xx || +-+------x--x-------+-+ +--+ +--+ || x x || | xx | || x x || | x x | || x x || +---x--------x----+ |x x| x x x++----------------++x UNACCEPTABLE! UNACCEPTABLE! Mounting -------- The drive should be mounted to the customer frame through the mechanically isolated mounting points on the bottom or sides of the drive using 6-32 machine screws, 1/4 inch maximum penetration. The customer should allow adequate ventilation to the drive to insure reliable drive operation over the operating temperature range. Mechanically isolated mounting points ------------------------------------- Four side mounting and four base mounting points are provided to the customer. Each mounting point is mechanically isolated from the drive. Cabling ------- Connect interface cables with connectors P1, P2, P3 and P4 to to J1, J2, J3 and J4 respectively. If multiple drives are to be inter- connected, remove the terminator packs in all but the last drive of the daisy chain. J1/P1 Control Signal Connector ------------------------------ Connection to J1 is through a 34 pin PCB edge connector. The pins are numbered 1 through 34 with the even pins located on the component side of the R/W and Logic Board Assembly. A key slot is provided between pins 4 and 6. The recommended mating connector (P1) is AMP Ribbon Connector P/N 88373-3. J2/P2 Data Signals Connector ---------------------------- Connection to J2 is through a 20 pin edge connector. The pins are numbered 1 through 20 with the even pins located on the component side of the R/W and Logic Board Assembly. A key slot is provided between pins 4 and 6. The recommended mating connector (P2) is AMP Ribbon Connector P/N 88373-6. P3 DC Power Connector --------------------- DC power connector (J3) is a 4 pin AMP Mate-N-Lok Connector P/N 350211-1 mounted in a cable extended 4 inches from the drive. The recommended mating connector (P3) is AMP P/N 1-480424-0 utilizing AMP pins P/N 350078-4. +------------+ | 4 3 2 1 | +------------+ J4/P4 Frame Ground Connector ---------------------------- Fasten AMP P/N 61761-2. Recommended mating connector is AMP P/N 62187-1. If used, the hole in J4 will accommodate a wire size of 18 AWG max. Electrical Interface -------------------- The interface to the MiniScribe I can be divided into three categories each of which is physically separated: Control Signals, Data Signals and DC Power. All control Signals are digital in nature (open collector TTL), and either provide signals to the drive (input) or signals to the collector (output). The Data Signals are differential in nature and provide data either to (write) or from (read) the drive. The interconnect cable between the drive and controller may be flat ribbon or twisted pairs of a length not to exceed 20 feet. The signal return lines and ground lines for J1 and J2 should be grounded at the controller. The voltage return lines of J3 should only be grounded at the power supply. Connector J4/P4 is a spade lug connector tied to frame ground. Drive Mechanism --------------- A brushless DC direct drive motor rotates the spindle at 3600 rpm. The motor/spindle assembly is dynamically balanced to provide minimal mechanical runout to the disks. A dynamic brake is used to provide a fast stop to the spindle motor when power is removed. Air Filtration System --------------------- Within the sealed enclosure, a 0.3 micron filter coupled with a breather filter provides over the drive life a clean, above atmospheric pressure environment to the heads and disks. Head Positioning Mechanism -------------------------- Two or four read/write heads are supported by a carriage mechaism coupled to the rotation stepper motor through a rack-and-pinion motion translator. The rack-and-pinion translator allows for the increased number of data tracks while retaining the full step holding torque and positioning repeatability characteristics of the stepper motor. Power Sequencing ---------------- +5 volts DC and +12 volts DC may be applied in any order. The +5VDC should be applied within 15 seconds of the +12VDC to insure proper automatic Track 000 calibration. +12 VDC powers the spindle drive motor. The microprocessor verifies that the disks are spinning at 3600 rpm and then activates the automatic Track Zero positioning. -TRACK ZERO, -SEEK COMPLETE, and -READY will beome true upon completion of the Track Zero positioning sequence. Cable Interconnection - 4 Drive System -------------------------------------- +-----------+ +-----------------+ | +---o---Control------------------+J1 Drive 1 | | | | +-------Data------------+J2 | | | | | +-Power---+J3 J4 ... | | | | | | +-----+-----------+ | | | | | +-Frame----+ | | | | | | +-----------------+ |Controller | o----+-------------+----+----|J1 Drive 2 | | | | | +-----------+----+----+J2 | | | | | | o----+----+J3 J4 ... | | | | | | | | +----+------------+ | | | | | | o---------+ | | | | | | | +-----------------+ +-----------+ o----+-+-----------+----+----+J1 Drive 3 | | | | | | +---------+----+----+J2 | | +---+----+ | | o----+----+J3 J4 ... | | +---+------+ | | | +-----+-----------+ | | | | | o----------+ |Data +---+--------+ | | +-----------------+ |Separator | +------------------+----+----+J1 Drive 4 | | +----------------------+----+----+J2 | | | o----+----+J3 J4 XXX | +-----------+ | | +-----+-----------+ DC voltages----+ o----------+ | Frame Ground--------+ ... = Terminator Pack removed XXX = Terminator Pack installed Caution/Warning --------------- The Miniscribe I is a precision product weighing 5.5 lbs. During handling the unit must not be dropped, jarred or bumped. Otherwise, damage to the heads and disks may occur. ********************************************************************** F E A T U R E S ********************************************************************** MINISC. 1006/1012 PRODUCT MANUAL MSI/002/981 ISSUE 0 Introduction ------------ The Miniscribe I is a 5 1/4 inch rigid media disk drive employing Winchester technology. MiniScribe I is available in two models providing respectively 6.4 and 12.8 MBytes of unformatted storage capacity. Both models are identical except for the number of heads and disks. MiniScribe I employs the industry standard ST506 interface, employs the same DC voltages and filts within the same physical form factor as the 5 1/4 inch floppy drives. Seek time --------- Linear |MiniScribe I ----------------------------+------------ Single Track | 1.75 ms Average | 179 ms (102 cylinders) Maximum | 534 ms Average Latency | 8.33 ms ----------------------------+------------ Software Scheduled |MiniScribe I ----------------------------+------------ Single Track | 1.75 ms Average* | 125 ms Maximum* | 375 ms Average Latency | 8.33 ms ----------------------------+------------ Settling Time 15 ms Reliability and Maintenance --------------------------- MTBF 8,000 hours (continuous operation) MTTR 30 minutes Preventive Maintenance None Component Design Life 5 years Media Defects Criteria ---------------------- Media defects as shipped from MiniScribe: Model 1006 10 defects maximum <2 bytes in length Cylinder 000 defect free Model 1012 20 defects maximum <2 bytes in length Cylinder 000 defect free. Track 000 Detector ------------------- The Track Zero Detector resides within the sealed enclosure. This optical sensor consist of a light source (activated only when a seek is initiated) and a receiver which when blocked by the positioner assembly indicates the logical/physical track 000. MFM Write Data -------------- In MFM recording, to optimize data integrity and meet the error rate specified, the write data presented by the controller must be pre- compensated on all tracks.