MICROPOLIS 1578 DISK DRIVE SPECIFICATIONS Model Number Unformatted Capacity: 1578-15 Total Mbytes ---------------- 382.3 --------------------- Disk Platters -------------------- 8 --------------------- Read/Write Heads ------------------- 15 --------------------- Cylinders ----------------- 1224 --------------------- Bytes per track --------------- 20,832 --------------------- Formatted Capacity (typical) Total Mbytes ---------------- 331.7 --------------------- Bytes per Sector ------------------ 512 --------------------- Sectors per Track ------------------- 36 --------------------- PC Setup When using SCSI in a PC, the most common method is to run your setup program and define No Drives Present. The SCSI Host Adapter will automatically self-configure on power-up. To install the drive, follow the manufacturer's instructions to use the on-board BIOS routine or software that was supplied with the Host Adapter. Performance Specifications Seek Time (including settling time) Track-to-Track 4 msec Average 18 msec Maximum 35 msec Average Rotational Latency 8.33 msec Rotational Speed 3600 rpm +/- 0.5% Data Transfer Rate at Interface Synchronous 4.0 Mbytes/sec Asynchronous 1.6 Mbytes/sec Internal Data Rate 10 Mbits/sec MTBF 150,000 hours Positioner Fully balanced rotary voice coil Parking Automatic park and lock General Functional Specifications Interface SCSI Supports Full Common Command Set Write Precompensation Start Cylinder 1224* Reduced Write Current Start Cylinder 1224* Landing Zone 1224 Mounting Plane Any orientation Power Requirements +12V +/-5% 2.25A avg. (4.25A max during start-up) +5V +/-5% 2.0A avg. Power dissipation, typical 32 Watts Drive Addressing and Interface Termination PIN 1 J2 J1 | ____________ _______________________________ J3 __| |_| |___________ | |____________| |_______________________________| | POWER | | RN202 RN203 RN204 |_________| | INTERFACE TERMINATORS | | | | ... W201 Terminator Option | | 123 | | | | Component Side Spindle control option W5 | | Bus Parity Check Option W4 | | Reserved W20 | | --ID0 | | SCSI ID --ID1 | | --ID2 | | | ____ ID2\ | ___ ID1 \__SCSI ID || __ ID0 / PIN 1 J2 ||| J1 | ____________ _______________________________ J3 __| |_| |___________ | |____________| |_______________________________| | POWER | | RN201 RN203 RN204 |_________| | W4 W5 Interface Terminators | | | |__Spindle Frame Ground W21 | | | Control W1 W2 | | | Option Terminator Options | | |__Bus W11 | | Parity Option +5v To Bus | | Reserved W20 | | | | | | | | | | | | Component Side | | | | | ID0, ID1, ID2 SCSI Address Jumpers The SCSI ID (drive address) jumpers are identified as ID0, ID1, and ID2. ID selection is binary, as shown in the table below. SCSI Jumpers Address ID2 ID1 ID0 ------- --- --- --- 0 out out out 1 out out in 2 out in out 3 out in in 4 in out out 5 in out in 6 in in out 7 in in in For multiple drive installations, on one Host Adapter,each drive must unique address. Drives are configured as SCSI ID 0 at the factory. RN202, RN203, RN204 Interface Terminator The Interface Terminators factory installed at RN202, RN203, and RN204 provide proper termination for the interface lines. When daisy-chaining multiple drives, leave the terminators installed only in the last physical drive on the daisy chain cable; remove all three terminators from each of the other drives. In most PC/AT installations, the C: drive is actually at the end of the cable and should retain the terminators. W201 or W1, W2 Terminator Options W201 positions 1-2 and 2-3 (or W1 and W2, respectively, on second board shown) select the source of terminator power (+5V) for the interface terminators. If a jumper is installed at positions 1-2 (W1) and no jumper is installed at position 2-3(W2)(the factory default configuration), the drive provides terminator power. This configuration is used for PC/AT applications. If no jumper is installed at W201 position 1-2(W1) but a jumper is installed at position 2-3(W2), terminator power must be provided by the host computer system via interface connector J1,pin 26. W11 Bus Option W11 (only present on Rev C and higher boards of the second type shown) allows the drive to supply interface terminator power to the SCSI Bus. If W11 is not installed (the factory default configuration), the drive does not supply SCSI bus interface terminator power. W11 should not be installed for PC/AT applications. W5 Spindle Option W5 selects the spindle control option. If W5 is installed, the drive waits for a Start Spindle command (after power is applied) to start the spindle motor. If W5 is not installed (the factory default configuration), the drive automatically starts the spindle motor at power-on. W5 is not installed for PC/AT installations. W4 Bus Parity Check Option W4 selects the parity check option. If W4 is installed, the drive neither generates nor detects parity. If W4 is not installed (the factory default configuration), the drive generates parity and enables parity detection. W4 is not installed most PC/AT applications. Verify the correct configuration required by your Host Adapter. W21 Ground Options W21(only implemented on Rev C and higher boards of the second type shown) is used to connect the drive's logic ground to frame ground. The factory default configuration, which should be used for PC/AT applications, is a jumper installed at W21.