R O 7 5 2 A RODIME NO MORE PRODUCED Native| Translation ------+-----+-----+----- Form 5.25"/HH Cylinders 306| | | Capacity form/unform 21/ 25 MB Heads 4| | | Seek time / track 85.0/18.0 ms Sector/track 34| | | Controller SCSI1 SINGLE-ENDED Precompensation Cache/Buffer 4 KB FIFO BUFFER Landing Zone Data transfer rate 0.937 MB/S int Bytes/Sector 512 MB/S ext Recording method RLL 2/7 operating | non-operating -------------+-------------- Supply voltage 5/12 V Temperature *C 10 50 | Power: sleep W Humidity % 10 85 | standby 9.0 W Altitude km | idle W Shock g 10 | 30 seek W Rotation RPM 2746 read/write W Acoustic dBA spin-up W ECC Bit 32 MTBF h 12000 Warranty Month Lift/Lock/Park NO Certificates ********************************************************************** L A Y O U T ********************************************************************** RODIME RO 650/750A USER MANUAL P/N USM 00113 +----------------------------------------------XXXXXXX----+ ++ LED 1 4 P2 | ++ | | | | 6-5 | S1 | | | ++2-1 | |||XX S | |||XX C | ++|XX S | ++|XX I | Terminator|||XX | Packs |||XX | ++|XX P1 | ++|XX | |||XX | |||XX | ++|XX +---------------------------------------------------------+2 1 ********************************************************************** J U M P E R S ********************************************************************** RODIME RO650/750A USER MANUAL P/N USM 00113 Jumper Setting ============== x = Factory setting S1 SCSI ID ----------- +----------+-----------------------+ | SCSI ID | Jumpers | +-2--4--6-+ | | 1-2 | 3-4 | 5-6 | | o o o | +----------+-------+-------+-------+ | o o o | | x 0 | OPEN | OPEN | OPEN | +-1--3--5-+ | 1 | OPEN | OPEN | CLOSED| | 2 | OPEN | CLOSED| OPEN | | 3 | OPEN | CLOSED| CLOSED| | 4 | CLOSED| OPEN | OPEN | | 5 | CLOSED| OPEN | CLOSED| | 6 | CLOSED| CLOSED| OPEN | | 7 | CLOSED| CLOSED| CLOSED| +----------+-------+-------+-------+ DC Power and pin connector assignments -------------------------------------- pin 1 +12 VDC pin 2 Ground pin 3 Ground pin 4 + 5 VDC ********************************************************************** I N S T A L L ********************************************************************** RODIME RO650/750A USER MANUAL P/N USM 00113 Drive Mounting RO 650A ---------------------- A sub-frame with tapped holes is provided with each drive and permits base or side mounting. This frame is fixed to the module via shock absorbing mounts. The drive may be oriented in any axis. When installing the drive into an enclosure at least 0.1 inch clearance must be maintained around the entire drive to ensure vibration isolation, prevent obstruction of the breather filter and the creation of ground loops. Screw size for RO 650A drive mounting is 6-32 inch; 0.25 inch max. thread engagement depth. Mounting RO 750A ---------------- The RO 750A consists of an RO 650A module and sub-frame which is attached to additional side brackets. The complete assembly meets the form factor requirements of a "half-height" 5.25 inch Winchester disk drive with the same tapped mounting holes. Screw size for RO 750A drive mounting is 6-32 UNC; 0.25 inch max. thread engagement depth. Multiple Drives --------------- Up to seven drives may be radially connected to a single host adapter. The adapter itself requires a unique SCSI address. RO 650A assignment is achieved by placing jumpers on the SCSI selector, designated S1. The drive is shipped with an SCSI address of 0 i.e. no jumpers are present. D.C. Power Connector -------------------- DC power is provided by a four pin AMP Mate-N-Lok connector (P2/J2) part number 350211-1 mounted on the solder side of the board. The re- commended mating connector is AMP part number 1-480424-0 utilising AMP pins part number 350078-4. Interface Connector ------------------- The RO 650A disk drive interface to a host adapter using a 50 pin, nonshielded flat ribbon connector. This connector is designated J1 and connects to the drive via connector P1. The pins are numbered 1 through 50. Pin 2 is located on the end of the board furthest from the DC power connector and is market. The recommended mating connector is 3M ribbon connector, P/N 3425-3000. Indicator --------- The drive has a single LED visible through the front facia, designated LED1. This LED will only be on when the drive is selected, otherwise it will be off. At the end of the power-up routine the LED will remain off. This LED is also used to flash fatal error messages should such fault conditions exists on the drive. Electrical Interface -------------------- The basic operating configuration consists of a host computer, host adapter and the RO 650A disk drive. The host is a computer system, the host adapter is an interface between the host's bus and the disk drive. All signals are active low and use open collector drivers. The bus should be terminated at both ends with 220 ohms to +5V and 330 ohms to ground at each of the cable. Output Characteristics ---------------------- Each signal driven by the RO 650A has the following output characteristics when measured at the drive's connector: Signal assertion = 0.0 volts dc to 0.4 volts dc. Minimum driver output capacity = 48 milliamps (sinking) at 0.5 volts dc. Signal negation = 2.5 volts dc to 5.25 volts dc. Input Characteristics --------------------- Each signal received by the RO 650A shall have the following input characteristics when measured at the drive's connector: Signal true = 0.0 volts dc to 0.8 volts dc. Maximum toatl input load = -0.4 milliamp at 0.4 volts dc. Signal false = 2.0 volts dc to 5.25 volts dc. Minimum input hysteresis = 0.2 volts dc. Terminator Power (Optional) --------------------------- The RO 650A is configured to supply terminator power,(TERMPWR), with the following characteristics: VTERM = 4.0 volts dc to 5.25 volts dc. 800 milliamps minimum source drive capability. 1.0 milliamp maximum sink capability. Hardware Implementation ----------------------- SCSI is implemented on a 50-way bus which has multiple, independent, interchangeable slots. The main advantage of a bus is that several tasks can be interleaved simultaneously on the bus. The RO 650A may operate in any of the configurations shown. Sample SCSI Configuration Host Adapter +--------+ | +-----+ Single Initiator, Single Target |ComputerXXX--------+Drive| +--------+ SCSI Bus+-----RO 650A +--------+ SCSI +-----+ Single Initiator, Multiple Target |ComputerXXX-----+--+Drive| +--------+| Bus | +-----RO 650A Host | +-----+ Adapter +--+Drive| +-----RO 650A Host Adapter | +--------+| SCSI Bus+-----+ Multiple Initiator, Multiple Target |ComputerXXX-+---+--+Drive| + +--------+ | | +-----+ | +--------+ | | +-----+ | |ComputerXXX-+ +--+Drive| + +--------+| | +-----+ | Host Adapter | +-----+ | +--+Drive| +---- RO 650A Intelligent Disk Drive | +-----+ | | +-----+ | +--+Drive| + Host Adapter | +-----+ | +--------+| | +-----+ | |ComputerXXX-----+--+Drive| + +--------+ +-----+ Buffer Memory ------------- A static 4K RAM data buffer is used as a first in first out (FIFO) circuit. This buffer i sused to enhance drive performance by storing blocks of data, thus allowing speed matching between the disk drive and the host. For convenience the default values set by Rodime are listed below: Format Parameters ----------------- Sectors per track = 32 Bytes per sector = 532 Interleave Factor = 2 Geometry Parameters ------------------- Number of cylinders = 306 Number of heads = 4