Hello Mike,

 JdBP>>   I tend to agree with Mike here.  Going by the 
 JdBP>> published documentation  a category 8 IOCTL write to 
 JdBP>> disc should fail unless you have locked  the drive; and 
 JdBP>> if that doesn't happen, it's a pretty serious bug.

 > That's a mess, admittedly.  DSK_LOCKDRIVE should certainly be 
 > required before allowing DSK_WRITETRACK, even if not before 
 > DSK_READTRACK.

 > See my extensive discussion above.

Maybe a very stupid question then, not directly connected but... 

how do "fdisk.com /newmbr" or "boot /dos" write
directly to physical sectors on the boot drive of a running os/2 ? What is
the documented way to do this ?

Pierre

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