Microsoft KB Archive/156362

= Floppy controller requirements for QIC-117 =

Article ID: 156362

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q156362



SUMMARY
Floppy disk drive controllers used by QIC series tape backup units operate at two different speeds. The speed at which the controller operates determines drive compatibility and what types of tapes can be read from or written to. Older style floppy disk drive controllers operate at a speed of 500 Kbps while newer style floppy disk drive controllers operate at 1 Mbps.



MORE INFORMATION
The floppy disk drive controller type can be determined from Registry Editor by performing the following steps:
 * 1) Load the QIC117 driver.
 * 2) From a command prompt, run Ntbackup.exe.
 * 3) WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

Start Registry Editor (Regedt32.exe) and select the following subkey:

Compare the FDCType entry with the table below:

Registry Value    Floppy Controller Type         Controller Throughput --    --         - FDC_NORMAL         Any NEC 768 compatible         250 KB/sec 500 KB/sec FDC_ENHANCED      Supports the version command   250 KB/sec 500 KB/sec FDC_NATIONAL      National 8477                  250 KB/sec 500 KB/sec 1 MB/sec FDC_82077         Intel 82077                    250 KB/sec 500 KB/sec 1Mb/sec FDC_82077AA       Intel 82077AA                  250Kb/sec 500 KB/sec 1 MB/sec FDC_82078_44      Intel 82078 44 Pin Version     250 KB/sec 500 KB/sec 1 MB/sec FDC_82078_64      Intel 82078 64 Pin Version     250 KB/sec 500 KB/sec 1 MB/sec(2 MB/sec                                                 capable) FDC_UNKNOWN       Type unknown                   250 KB/sec 500 KB/sec

The floppy controller requirements for QIC standard drives are as follows:

QIC117 Standard           Floppy Drive Controller Requirements ---           QIC-40                     500 Kbs or higher QIC-80                    500 Kbs or higher QIC-3010                  500 Kbps or 1Mbps Floppy controller QIC-3020                  1 Mbps Controller

Additional query words: floppy qic117 travan

Keywords: kbhardware KB156362

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