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<TITLE>Int 21/AX=440Dh/CX=084Bh
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Int 21/AX=440Dh/CX=084Bh - MS-DOS 7.0+ - GENERIC IOCTL - LOCK PHYSICAL VOLUME -
AX = 440Dh
CX = 084Bh / 484Bh
(category code 08h for FAT12/16, 48h for FAT32; minor code 4Bh)
BH = logical drive number (00h = default, 01h = A:, etc.)
BL = lock level (00h-03h)
DX = drive permissions (see #01575) for Level 1 lock or second
Level 0 lock when formatting
Return: CF set on error
AX = error code (01h,02h,etc.) (see #01680 at AH=59h/BX=0000h)
CF clear if successful
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<h2>Int 21/AX=440Dh/CX=084Bh
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<h3><font color=#C00040>MS-DOS 7.0+ - GENERIC IOCTL - LOCK PHYSICAL VOLUME</font></h3>
<PRE>
AX = 440Dh
CX = 084Bh / 484Bh
(category code 08h for FAT12/16, 48h for FAT32; minor code 4Bh)
BH = logical drive number (00h = default, 01h = A:, etc.)
BL = lock level (00h-03h)
DX = drive permissions <a href="rb-2897.htm#Table1575" tppabs="http://www.ctyme.com/intr/rb-2897.htm#Table1575">(see #01575)</a> for Level 1 lock or second
Level 0 lock when formatting<br>
<p><b>Return:</b><br>CF set on error
AX = error code (01h,02h,etc.) <a href="javascript:if(confirm('http://www.ctyme.com/intr/rb-0000.htm \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/intr/rb-0000.htm#Table0'" tppabs="http://www.ctyme.com/intr/rb-0000.htm#Table0"></a>(see #01680 at AH=59h/BX=0000h)
CF clear if successful
</PRE>
<p><b>Desc:</b>
Lock all logical volumes on the same physical volume as the indicated
drive
<p><b>Note:</b>
The physical volume must be locked before direct disk writes via
INT 13 are permitted by Windows95
<p><b>See Also:</b>
<a href="rb-2896.htm" tppabs="http://www.ctyme.com/intr/rb-2896.htm">AX=440Dh"DOS 3.2+"</a> - <a href="rb-2897.htm" tppabs="http://www.ctyme.com/intr/rb-2897.htm">AX=440Dh/CX=084Ah</a> - <a href="rb-2900.htm" tppabs="http://www.ctyme.com/intr/rb-2900.htm">AX=440Dh/CX=086Bh</a>
<p><b>See Also:</b>
<a href="rb-2901.htm" tppabs="http://www.ctyme.com/intr/rb-2901.htm">AX=440Dh/CX=086Ch</a>
<p>
<b>Category: <a href="cat-010.htm" tppabs="http://www.ctyme.com/intr/cat-010.htm">
DOS Kernel</a>
- <a href="int-21.htm" tppabs="http://www.ctyme.com/intr/int-21.htm">
Int 21h</a>
- <a href="alpha-m.htm" tppabs="http://www.ctyme.com/intr/alpha-m.htm">
M</a>
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