MICROPOLIS 1300 SERIES DISK DRIVE SPECIFICATIONS Model Number Unformatted Capacity: 1302 1303 1304 Total Mbytes 25.9 43.3 85.3 Disk Platters 2 3 4 Read/Write Heads 3 5 6 Cylinders ------------------- 830 ----------------- Bytes per track ---------------- 10,416 ----------------- Formatted Capacity: Total Mbytes 20.4 34.0 40.8 Bytes per Sector ------------------- 512 ----------------- Sectors per Track -------------------- 17 ----------------- PC Drive Types Examine the entries in your drive table and find the type that most resembles the head and cylinder parameters of the drive without exceeding these parameters. If you are using third-party installation/partitioning software, follow the instructions included with the software as it may perform this step automatically. Performance Specifications Seek Time (including settling time) Track-to-Track 6 msec Average 30 msec Maximum 60 msec Average Rotational Latency 8.33 msec Rotational Speed 3600 rpm +/- 0.5% Data Transfer Rate 5 Mbits/sec Optimum Step Rate 20 usec or faster (buffered seek) MTBF 20,000 hours Positioner Fully balanced rotary voice coil Parking Automatic park and lock General Functional Specifications Interface ST-506/412 Encoding Method MFM (Modified Frequency Modulation) (Although these drives may be capable of functioning in an RLL environment, Micropolis does not certify or warrant them for this application.) Sectoring Soft Write Precompensation Start Cylinder 830* Reduced Write Current Start Cylinder 830* Landing Zone 830 Type of Media Plated Mounting Plane Any orientation * These are effectively turned off by specifying a non-existent cylinder. Some systems accomplish this by using a value of "-1" Power Requirements +12V +/-5% 2.0A avg (3.9A max during start-up) +5V +/-5% 0.9A avg Power dissipation, typical 29 Watts Drive Addressing and Interface Termination J1 J2 ____ __________________ ____________ ________ # # #1# # #1# # # W W # # #_# #___# #_# 7 8 # # D D D D # # TERMINATOR W W S S S S # # 1 2 1 2 3 4 # # # # # # (COMPONENT SIDE) # DS1, DS2, DS3, DS4 Drive Select Jumpers The Drive Select jumper locations are identified as DS1, DS2, DS3, and DS4. Only one Drive Select jumper is installed on a drive. The drives are shipped with the jumper installed at DS1. For every drive in a PC/AT installation, move the jumper from DS1 to DS2 (the special twisted interface cable that is generally used takes care of assigning a unique address to each drive). Some other systems may require that each drive be jumpered to a unique address (i.e., different DS numbers). RN1 Interface Terminator The Interface Terminator factory installed at RN1 provides proper termination for the interface lines. When daisy-chaining multiple 1300 drives, leave the terminator in the last physical drive on the daisy chain cable; remove the terminator 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 terminator. W1 Write Fault Latch W1 is the Write Fault Latch. If W1 is present and the drive encounters a write fault, all writing to the drive is inhibited until after the drive has been de-selected. If W1 is absent, fault conditions are not latched. Drives are shipped with a jumper installed at W1; remove it for PC/AT installations. W2 is always installed. W7 is never installed. W8 is always installed.