MICROPOLIS MICRODISK
                Configuration/Specification Data Sheet


 Model                  340       670      1030      1340      1750

                         Unformatted Capacity
Total (MB)              385       765      1203      1535      2000
Disk Platters             4         8         8         8         8 
Read/Write Head           7        15        15        15        15
Cylinders              1780      1632      1928      2100      2099
Bytes per Track       31248     31250     41664     48608    Variable  
                          Formatted Capacity

Total MB                340       667      1036      1341      1748
Bytes per Sector        512       512       512       512       512
Sectors per Track        54        54        71        84    Variable
Cylinders              1774      1626      1922      2094      2089

                           Performance Specs
Seek Time (ms)
 Track-to-track           4         4         4          4      2.5 
 Average                 15        16      14.5       14.5       14
 Maximum                 30        35        29         29       29
 Effective Access       4.4       4.6       4.1        4.1      3.9

Average Rotational 
 Latency (ms)          8.33      8.33      8.33       8.33     8.33
Rotating speed
 (rpm +/- 0.5 %        3600      3600      3600       3600     3600
Data Transfer Rate
 at Interface
    Sync(MB/sec)        4.0       5.0       5.0        5.0   up to 10.0
    Async(MB/sec)       1.6       1.8       1.8        1.8   up to 4
Internal Data rate(MHz)  15        15        20       23.33   24-38
Disk Drive MTBF(hours)150,000   150,000   150,000    150,000  150,000
Subsystem MTBF (hours) 20,000    20,000    20,000     20,000   20,000
Positioner          ■─────■■Fully Balanced rotary voice coil────────■
Parking              ■───────■Automatic park and lock ■─────────────■
Interface              SCSI     SCSI-2    SCSI-2     SCSI-2   SCSI-2


[] Novell Netware Ready 
   Every Micropolis Hs drive is 100% Novell compatible, and every model 
   has completed or will soon complete the rigorous testing required to 
   be fully Netware Ready. This eliminate the need to compsurf, saving 
   as much as 100 hours or more in installation and setup time.

For an Authorized Micropolis Reseller near you, call:1-800 395-3748

Micropolis is a registered trademark of Micropolis Corporation.
Microdisk is trademark of Micropolis Corporation. All other products or
brand names listed are trademarks or registered trademarks of their
respective holders.