Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
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Int 21h Function 0Dh
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     This function does not update the disk directory for any files
     that are still open. If your program fails to properly close all
     files before the disk is removed, and files have changed size, the
     data forced out to the disk by this function may still be
     inaccessible because the directory entries will not be correct.
 
     [Version 3.3+]
     Int 21h Function 68h (Commit File) should be used instead of this
     function because it also updates the disk directory and file
     allocation table.
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