Thomas Langenkamp wrote in a message to All:

 TL> I want to read the boot-sector of my hard-disk (may be fat
 TL> or hpfs) but I always get an error 'invalid-pa

How do you try to read it? I wrote a hex editor which also handles this,
here is how I open a device:

rc = DosOpen("C:", &h, &action,
      0, 0,
      OPEN_ACTION_FAIL_IF_NEW|OPEN_ACTION_OPEN_IF_EXISTS,
      OPEN_FLAGS_DASD||OPEN_SHARE_DENYWRITE|OPEN_ACCESS_READONLY, 
      NULL );

You can now use 'DosSetFilePtr()' and 'DosRead()' to read various parts of
logical drive 'C:'.

OBS: You may even use OPEN_ACCESS_READWRITE to change something. If you do
so I would recommend to call DosDevIOCtl(category 8, function 0) 'Lock
Drive' prior. So nobody else is able to change the contents of the disk
simultaneously. This 'Lock Drive' will return 108 = ERROR_DRIVE_LOCKED on
boot drives (or at least if HPFS).



Tschuesz,
           Vitus

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