MICROPOLIS 1660 DISK DRIVE SPECIFICATIONS Model Number Unformatted Capacity: 1664-7 Total Mbytes --------------- 389.3 ----------------- Disk Platters ------------------- 4 ----------------- Read/Write Heads ------------------- 7 ----------------- Cylinders ---------------- 1780 ----------------- Bytes per track -------------- 31,832 ----------------- Formatted Capacity Total Mbytes --------------- 344.4 ----------------- Bytes per Sector ----------------- 512 ----------------- Sectors per Track ----------------- 54 ----------------- PC Drive Types. If you are using third-party installation software or an board BIOS on the controller, follow the instructions included with the software or controller. Otherwise, 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. Performance Specifications Seek Time (including settling time) Track-to-Track 4 msec Average 14 msec Maximum 30 msec Avg Rotational Latency 8.33 msec Rotational Speed 3600 rpm +/- 0.5% Data Transfer Rate 15 Mbits/sec MTBF 150,000 hours Positioner Fully balanced rotary voice coil Parking Automatic park and lock General Functional Specifications Interface ESDI Sectoring (see W1 description, below) Hard or Soft Write Precompensation Start Cylinder 1780 * Reduced Write Current Start Cylinder 1780 * Landing Zone 1780 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% 0.9A Avg (2.0A max. during start-up) +5V +/-5% 0.7A avg Power dissipation, typical 14 Watts Drive Addressing and Interface Termination NOT USED J2 J1 J3 ____ ___________ _________________ ________ Power | | | |1| | |1| || Power | (under | |_| |_____| |_| -------| board) | | | | | Terminator | | | | | | | | | | | | | | DA1 | | DA2 | | DA3 (Component side) | | W5 | | W4 | | W3 | | W2 | | W1 | RN1 Interface Terminator The Interface Terminator factory installed at RN1 will provide proper termination for the interface lines. When daisy-chaining multiple drives, leave the terminator installed only in the last physical drive on the daisy chain; 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. DA1, DA2, DA3 Drive Address Jumpers The drive address jumpers are identified as DA1, DA2 and DA3. Address selection is binary, as shown in the table below. The ESDI controllers's documentation will specify the drive address to use. Drive Select Jumpers Address DA3 DA2 DA1 ------- --- --- --- 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 "Drive address 0" (no jumper at DA1, DA2, or DA3) is a "deselect" (i.e., no drive selected). Drives are factory configured as Drive Address 1. For many multiple drive installations, each drive must have a unique address. An exception is that for every drive in a PC/AT installation, verify that the only Drive Address is at DA2; move the jumper if necessary(the special twisted interface cable that is generally used takes care of assigning a unique address to each drive). PC/AT controller can typically support a maximum of two drives. W5 Selects the Spindle Control Option. W5 selects the spindle a 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 applications. W1 Selects the Sectoring Mode. If W1 is installed, the drive operates in the soft-sectored mode. If W1 is not installed(the factory default configuration), the drive operates in the hard-sector mode. W1 is not installed for most PC/AT in applications. W2, W3, W4 Sector Size and Number Options The number of bytes per sector may be specified using the Set Bytes Per Sector command or by selecting a default sector configuration with jumpers W2, W3, and W4 as follows: Jumpers Sectors Bytes/Sector W4 W3 W2 Per Track Formatted Unformatted --- --- --- --------- --------- ----------- out out out 53 512 588 ------------------------------------------------------------- | * out out in 54 512 576 | ------------------------------------------------------------- out in out 28 1024 1116 out in in 14 2048 2232 in out out 7 4096 4464 ----------------------- RESERVED ---------------------------- in in out 97 256 321 in in in 1 31,248 31,248 * This is the default (factory installed) configuration and is recommended for PC/AT applications