MICROPOLIS 1936 DISK DRIVE SPECIFICATIONS Model Number Unformatted Capacity: 1936-21 Total Mbytes -------------- 3557 ----------------- Disk Platters ----------------- 11 ----------------- Read/Write Heads ----------------- 21 ----------------- Cylinders --------------- 2772 ----------------- Bytes per track ----------- VARIABLE ----------------- Formatted Capacity Total Mbytes --------------- 3022 ----------------- Bytes per Sector ---------------- 512 ----------------- Sectors per Track ----------- VARIABLE ----------------- 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 Adjacent Track 2.0 msec (including settling time) Average 11.5 msec Maximum 25 msec Average Rotational Latency 5.56 msec Rotational Speed 5400 rpm +/- 0.5% Data Transfer Rate at Interface Synchronous Up to 10 Mbytes/sec Asynchronous Up to 4 Mbytes/sec Internal Data Rate 36 to 48 MHz MTBF 300,000 hours Positioner Fully balanced rotary voice coil Parking Automatic park and lock General Functional Specifications Interface Fast SCSI-2 Supports Full Common Command Set YES Mounting Plane Any orientation Power Requirements +12V +/-5% 1.95A Avg (4.35A max during start-up) +5V +/-5% 0.9A avg Power dissipation, typical 30 Watts 7. Drive Addressing and Interface Termination ___________Slave sync(pin 20) # ________Master sync(pin 16) # # ______Bus parity check option( 7th set of pins) # # # _____Write protect option(6th set of pins) # # ## ____Spindle control option(4th set of pins) # # ### ___ID2 # # #### __ID1 # # ##### _ID0 Pin 1 # # ###### # ___________ __________________________ ________ _# J2 # # J1 # # J3 # # #___________#_ #__________________________#___#________# # # # W12 : ___________ . W1 # # #___________# : W2 # # RN6 # # W11 # # # # # # # # # # # # 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 have a unique address. Drives are configured as SCSI ID 7 at the factory. RN6 Interface Terminator The Interface Terminator factory installed at RN6 provides proper termination for the interface lines. When daisy-chaining multiple drives, leave the terminator installed only in the last physical drive (or drives) on the daisy chain cable; remove the terminator from each of the other drives (or the host computer). Bus Termination Power Option A jumper is installed at W1, at W2, or at W2 and W12 to select the source of terminator power (+5V) for the SCSI Bus terminator packs on the device electronics board. DO NOT INSTALL JUMPERS AT BOTH W1 AND W12 When a jumper is installed at W1(the factory default configuration), the drive provides terminator power to it's on-board terminators. When a jumper is installed at W2 , terminator power is is provided by the host system via the interface cable J1, pin 26 (TERMPWR). When a jumper is installl at both W2 and W12, the drive provides terminator power to its on-board terminators and also to the SCSI bus via interface cable J1,pin 26(TERMPWR). Frame Ground Options Jumper W11 selects the frame ground option. When W11 is installed, the drive's frame is connected to frame ground. When a jumper is not installed at W11 (the factory default configuration), frame ground is not connected to logic ground. Spindle Control Options A jumper bridging pins 7 and 8 of J2 (the 4th set of pins)is used to select the spindle control option. When a jumper is installed, the drive must wait for an interface Start Unit command to start the spindle motor. When a jumper is not installed(the factory default configuration), the drive automatically starts the spindle motor at power-on Write Protect Option A jumper bridging pins 11 and 12 of J2 (the 6th set of pins) is used to select the write protect option. When a jumper is installed, the drive is write protected. CAUTION: The drive can still be formatted. When a jumper is not installed,(the factory default configuration), the drive is not write protected. Bus Parity Option A jumper bridging pins 13 and 14 of J2(7th set of pins) is used to select the parity check option. When a jumper is not installed, (the factory default configuration), the drive neither generates nor detects parity. When a jumper is installed, the drive generates parity and enables parity detection. Spindle Synchronization Option The Rotational Position Locking field(MODE SELECT command, Page Code 04h) is used to specify spindle synchronization operation; see document #110366(Scsi Implementation in Micropolis "MZR" Products) and ANSI SCSI Standard. Unsynchronized:If the drive is est to Unsynchronized(PRL=00b), it ignores the SLAVE SYNC signal. Slave:If the drive is set to Slave(RPL=01b), it does not generate the MASTER SYNC signal or the SLAVE SYNC signal but synchronizes its index to the SLAVE SYNC signal (J2,pin 20) supplied by an external source Master:If the drive is set to MASTER(RPL=10b), it generates the SLAVE SYNC output signal (j2,pin 20) for use directly by the slave drives. Master Control:If the drive is set to Master Control(RPL=11b), i generates the MASTER SYNC signal(j2,pin 20). This output is used by the controller to generate the SLAVE SYNC signal(J2,pin 20) for the slave drives. **** THESE SPECIFICATIONS ARE PRELIMINARY.