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                                MODEL  XT-1240R
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              Interface:  ST506/412            RLL Certified Only

Capacity, Unformatted                Capacity, Formatted ST506/412 Compatible

Per Drive (Mbytes)    :  239.98      Per Drive (Mbytes)    :  196.60
Per Surface (Mbytes)  :  15.99       Per Surface (Mbytes)  :  13.10
Per Track (Bytes)     :  15,624      Per Track (Bytes)     :  12,800
                                     Per Sector (Bytes)    :  512

Parameters                           Performance Specifications

Cylinders     :  1024                Transfer rate, Mbits/sec    :  5.0 
Data Heads    :  15	             Access Time (Average)       :  27msec  
Sector\Track  :  26                  Access Time (Track-To-Track):  4msec  
Pre-Comp         NONE                Access Time (Maximum)       :  46msec  
                                      
MTBF:  70,000 Hours (POH)            Dimensions(Inches): 3.25" x 5.75" x 8.20""

Power Requirements:  +12VDC +\- 5%. 1.5A Typical, 4.5A Maximum
                     + 5VDC +\- 5%. 1.7A Typical, 1.9A Maximum

NOTE:  This drive is Controller dependent.  All seeks performed by the XT-1240R
       are "Buffered" type seeks.  Optimal seek times are dependent upon the
       drive receiving STEP pulses at a rate greater than one pulse every 13 
       micro seconds.  In addition, STEP pulses slower than this causes 
       average access times to degenerate.