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Check floppy drive busy Win9X

Posted on 2004-08-24
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Last Modified: 2012-05-05
On a Win9x OS, how can I check if the floppy drive is busy?

I have a program monitoring another process, and I need to be able to determine when the other executable is done process files on a floppy disk.
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Question by:AUDRABRETT7
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Expert Comment

by:jkr
ID: 11884540
Try to

HANDLE hFloppy = CreateFile ( "\\\\.\\A:", GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);

if ( INVALID_HANDLE_VALUE == hFloppy && ERROR_SHARING_VIOLATION == GetLastError ()) {

    // assume "busy"
}
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Author Comment

by:AUDRABRETT7
ID: 11885624
jkr,
That didn't work.

I get an INVALID_HANDLE_VALUE always.

It doesn't matter if the floppy drive is bussy or not.
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Expert Comment

by:jkr
ID: 11885742
Sorry, that was the NT way. 9x requires FILE_SHARE_WRITE to be set, thus defeating the purpose...


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Expert Comment

by:Jaime Olivares
ID: 11885909
You can try with GetVolumeInformation, but I have not tried what happens if floppy drive is bussy (maybe can return with cached information)

http://msdn.microsoft.com/library/en-us/fileio/base/getvolumeinformation.asp
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Expert Comment

by:grg99
ID: 11886192
>On a Win9x OS, how can I check if the floppy drive is busy?

Probably not doable in the way you're thinking.

Can you wrap the other program in a batch file that does:


echo "BUSY" >A:\BusyFile
TheProgram
del A:\BusyFile

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LVL 30

Expert Comment

by:Axter
ID: 11886424
You can try using FindFirstChangeNotification.

Example code:
bool FloppyDiskIsBusy()
{
      HANDLE hNotify = FindFirstChangeNotification ( "a:\\", TRUE,
            FILE_NOTIFY_CHANGE_FILE_NAME|
            FILE_NOTIFY_CHANGE_DIR_NAME|
            FILE_NOTIFY_CHANGE_ATTRIBUTES|
            FILE_NOTIFY_CHANGE_SIZE|
            FILE_NOTIFY_CHANGE_LAST_WRITE);
      if (hNotify != INVALID_HANDLE_VALUE)
      {
            if (WaitForSingleObjectEx(hNotify,3000,FALSE) == WAIT_TIMEOUT)
                  return false;
      }
      return true;
}


Example usuage:
      while(FloppyDiskIsBusy())
      {
            Sleep(1000);
      }
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Author Comment

by:AUDRABRETT7
ID: 11886701
Axter,

That code works only if I change the 3000 value to 15000
if (WaitForSingleObjectEx(hNotify,15000,FALSE) ==

But then there's a 15 second delay for the results when the other program is finish processing.

Since this is better then nothing, I'll use it if no one else has a better suggestion.
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Expert Comment

by:Axter
ID: 11891074
What exactly is the other process doing to the floppy drive?
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Author Comment

by:AUDRABRETT7
ID: 11893138
The other executable is creating a set of installation disk.
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Accepted Solution

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Axter earned 500 total points
ID: 11893598
One thing you can do is check to see if the disk is full or almost full.
Or you can check the free space available, and then Sleep for a second to see if the free space has change.

That can help you determine if the other process is done.
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