40 MB Smartdrive  (250-4119)   Specifications          Faxback Doc. # 3077

Manufacturer and Model: MINISCRIBE 8051 A

        Interface: AT          Avg. Access Time: 28ms
       Drive Type: 17            Transfer Rates: 8 Mbits/sec (disk)
         Capacity: 42 MEG                  up to 4 Mbytes/sec (host)
        Cylinders: * 981       Rotational Speed: 3484 RPM +/- 1%
            Heads: * 5           Operating Temp: 40 to 122 F
Sectors Per Track: * 17                    MTBF: 30,000 hours
  Tracks Per Inch: 1109       Drive Design Life: 5 years
 Bytes Per Sector: 512    DC Power Requirements: 
  Number of Disks: 2                    +12vdc 1.5amps max, .45amps typical
            Style: IDE                  +5vdc .45amps typical
Read/Write Format: RLL        Power Dissipation: 8 watts typical
     Cache Buffer: 32K                           


* During device installation, use drive type 17 (981 cyl, 5 heads,
  and 17 sectors per track).

The 25-4119 supports translation from a logical addressing mode to its
physical parameters.  In the translation mode, the 25-4119 appears to
the host system as having 981 cylinders, 5 heads, and 17 sectors per
track.  In real mode, the drive actually has 745 cylinders, 4 heads,
and 28 sectors per track.


The translation mode is the only way Tandy supports the use of the drive.

(dtc-07/28/93)