TITLE Quark QC Hard Disk: Specifications (Discontinued) Article ID: 1948 Created: 5/7/86 Modified: 9/27/93 -------------------------------------------------------------------------------- TOPIC -------------------------------------------------------------------------------- DISCUSSION Performance Capacity 10.3 & 21.0 Megabytes Formatted Access Time Track to Track 16.4 mSec Average 85 mSec maximum 175 mSec Average Latency 8.37 mSec Startup time(typical) 12 Sec Functional Rotational Speed 3600 RPM Recording Density 9036 & 9827 BPI Track Density 360 & 588 TPI Cylinders 306 Read/Write Heads 4 Disks 2 Domestic Power Supply 115 VAC 60Hz 0.45 Amps. European Power Supply 230 VAC 50Hz <0.25 Amps. Environmental Limits Ambient Temperature Operating +50 to +115 Degrees F +10 to +46 Degrees C Non-Operating -40 to +140 Degrees F -40 to +60 Degrees C Relative Humidity Operating 8% to 80% non-condensing Non-Operating 1% to 95% Altitude Limit 10,000 ft(3048m) above sea level. Shock Non Operating 30g Maximum Dimensions Height 3.85 in (97.79mm) Width 14.5 in (368.3mm) Depth 8.5 in (215.9mm) Weight 11.0 lbs (approx. 50 kg) Perfomance Comparison Data based on reading (2000 blocks QC, 200 blocks DiskII, 800 blocks Macintosh 400K internal drive) in sequence from the disks. Apple IIc Internal disk drive 16.4 blocks per second QC hard disk 25.7 blocks per second Apple II and III Disk II, III and Duodisk 16.4 blocks per second Profile 41.3 blocks per second QC hard disk 55.6 blocks per second Macintosh 2.0 System Macintosh 400K 29 blocks per second QC hard disk 45 blocks per second NOTE: Apple Computer, Inc. is not responsible for the contents of this article.