MICROPOLIS 1518 DISK DRIVE SPECIFICATIONS Unformatted Capacity: Model Number 1518-15 Total Mbytes ----------------- 1534 ---------------------- Disk Platters -------------------- 8 ---------------------- Read/Write Heads ------------------- 15 ---------------------- Cylinders ----------------- 2104 ---------------------- Bytes per track ---------------- 48608 ---------------------- Formatted Capacity (typical) Total Mbytes ----------------- 1341 ---------------------- Bytes per Sector ------------------ 512 ---------------------- Sectors per Track ------------------- 83 ---------------------- PC Drive Types If you are using third-party installation software or an on- board BIOS on the controller, follow the instructions included with the software or controller. Otherwise, examine the entries in your system 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 14.5 msec Maximum 33 msec Average Rotational Latency 8.33 msec Rotational Speed 3600 rpm +/- 0.5% Data Transfer Rate 23.33 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 2104* Reduced Write Current Start Cylinder 2104* Landing Zone 2104 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. (4.3A max during start-up) +5V +/-5% 1.5A avg. Heat dissipation, typical 24 Watts 1518-series drives require the use of an ESDI Controller capable of a data transfer rate of at least 23.33 Mbits/sec. Drive Addressing and Interface Termination NOT USED J12 J2 J1 J3 ____ ________ ___________________ _ _________ # # # #1# # #1# # # POWER # # #_# #____# #_# #_________# # # # RN11 :::::::: # # DDDWWWWW W28: # # AAA54321 # # 321 # # # # # # # # (Component Side) # # _# # # # #_ # # # # The Interface Terminator factory installed at RN11 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 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. 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 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 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 install for most PC/AT in applications. W28 is for the Frame ground option. When a jumper is installed at W28, frame ground is connected to logic ground. When a jumper is NOT installed at W28(the factory default configuration), frame ground is not connected to logic ground. * 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 82 512 594 ------------------------------------------------------------- # * out out in 83 512 584 # ------------------------------------------------------------- out in out 44 1024 1105 out in in 22 2048 2209 in out out 11 4096 4419 in out in 58 768 839 in in out 149 256 326 in in in 1 48,608 48,608 * This is the default (factory installed) configuration and is recommended for PC/AT applications