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Text File  |  1989-10-03  |  4.2 KB  |  98 lines
  1.  
  2.                       1670/1680 MAC SERIES
  3.                          Specifications
  4.  
  5. The Micropolis Macintosh-Compatible disk drives are designed
  6. especially for Value-Added Distributors and Resellers of Macintosh
  7. storage systems and sub systems.
  8.  
  9. Compatible with Mac Plus, Mac SE, Mac II, and Mac IIx computers.
  10.   Half-height form factor adapts easily to Mac II and Mac IIx    
  11.     systems.
  12.   Half-Height form factor adapts for low profile external        
  13.     package integration.
  14.   The drives employ a closed-looped digital servo which ensures  
  15.     accurate tracking under all environmental conditions.
  16.   Macintosh-compatible SCSI interface permit easy integration,   
  17.     eliminating the need for cable modification.
  18.   SCSI features include:
  19.     A full 64 Kbytes buffer with read-ahead capability for faster 
  20.       data access
  21.     Less than 600 microseconds command overhead to improve       
  22.       overall throughput numbers
  23.     Cylinder oriented defect management, offering the most       
  24.       reliable data integrity system available
  25.  
  26.   Formatted Capacity:              Model Number
  27.  
  28.   Model                   1673-5                   1674-7
  29.   Total Mbytes               112                      158
  30.   Bytes Per Sector  -------------------- 512 --------------------
  31.   Sector Per Track  --------------------- 36 --------------------
  32.   Cylinders         ------------------- 1245 --------------------
  33.   Data Heads                   5                        7
  34.  
  35.   Formatted Capacity:              Model Number
  36.  
  37.   Model                   1683-4                   1684-7
  38.   Total Mbytes               193                      340
  39.   Bytes Per Sector  --------------------- 512 -------------------
  40.   Sector Per Track  ---------------------  54 -------------------
  41.   Cylinders         -------------------- 1777 -------------------
  42.   Data Heads                   4                        7
  43.  
  44. 1670 Performance
  45.  
  46.   Seek Time (includes settling)            Track to Track  4 msec
  47.                                            Average        16 msec
  48.                                            Maximum        37 msec
  49.   Latency Time(average)                                 8.33 msec
  50.   Rotational Speed                                  3600 rpm+/-5%
  51.   Media Transfer Rate                                      10 MHz
  52.  
  53. 1680 Performance
  54.  
  55.   Seek Time (includes settling)            Track to Track  4 msec
  56.                                            Average        14 msec
  57.                                            Maximum        30 msec
  58.   Latency Time(average)                                 8.33 msec
  59.   Rotational Speed                                  3600 rpm+/-5%
  60.   Media Transfer Rate                                      15 MHz
  61.  
  62. Interface                                                Mac SCSI
  63.  
  64. Features
  65.  
  66.   Command Overhead                     Less than 600 Microseconds
  67.   Buffer                                     64 KByte with parity
  68.   Defect Management                             Cylinder oriented
  69.   Data Integrity
  70.     Automatic Retry with early/late strobe, track offset
  71.     48 bit ECC polynomial
  72.     Parity through buffer
  73.  
  74. Form Factor             (Industry standard for 5 1/4 half-height)
  75.   Height                                   1.625 inches (41.3 mm)
  76.   Width                                   5.75  inches (146.1 mm)
  77.   Depth                                   8.00  inches (203.2 mm)
  78.   Weight                               5 pounds (2.27 kg) maximum
  79.  
  80. Other Specifications
  81.  
  82. Power Requirements
  83.  
  84.   + 12V +/- 5%                                            1.0 Avg
  85.                                      2.0A Maximum during start-up
  86.   + 5V +/- 5%,                                           1.9A Avg
  87. Power Dissipation, typical                               15 Watts
  88. Acoustic Noise
  89.   Idling                                                   40 dBA
  90.   Seeking                                                  45 dBA
  91. Mounting       Half-height 5 1/4 inch disk drive, any orientation
  92.  
  93. Reliability
  94.   MTBF                                       150,000 power-on hrs
  95.   MTTR                                                 15 minutes
  96. Preventive Maintenance                                       none
  97. Electronic Adjustments                                       none
  98.