realdevice???

NTDEV
1

Hi,

Under vpb in mountvolume, there are two device object
one is deviceobject and one is realdevice
what is this realdevice?
what is the difference?

hope someone can enlighten me on this

thank you

cheers,
vincent

Download Norah Jones, Eminem and more! http://www.msn.com.sg/ringtones/

2

Vpb->RealDevice is a bottom-most DO (usually PnP PDO) in a disk device
stack.
Vpb->DeviceObject is a mounted FS volume device object - again the
bottom of the attachment stack.

Max

----- Original Message -----
From: “vincent gambit”
To: “NT Developers Interest List”
Sent: Tuesday, July 08, 2003 2:30 PM
Subject: [ntdev] realdevice???

> Hi,
>
> Under vpb in mountvolume, there are two device object
> one is deviceobject and one is realdevice
> what is this realdevice?
> what is the difference?
>
> hope someone can enlighten me on this
>
> thank you
>
> cheers,
> vincent
>
> _________________________________________________________________
> Download Norah Jones, Eminem and more!
http://www.msn.com.sg/ringtones/
>
>
>
> —
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to
xxxxx@lists.osr.com

3

The realdevice is the media device object (a disk partition, a cdrom etc.)
The deviceobject is the filesystem created volume device object. The vpb
provides the linkage so that when you open, for example, “C:\foo.bar”, C:,
which is a symbolic link to a disk partition device object, is related
through its VPB to the filesystem supporting that partition and its (hidden)
volume device object.

=====================
Mark Roddy
Hollis Technology Solutions
www.hollistech.com
xxxxx@hollistech.com

-----Original Message-----
From: vincent gambit [mailto:xxxxx@hotmail.com]
Sent: Tuesday, July 08, 2003 6:31 AM
To: NT Developers Interest List
Subject: [ntdev] realdevice???

Hi,

Under vpb in mountvolume, there are two device object
one is deviceobject and one is realdevice
what is this realdevice?
what is the difference?

hope someone can enlighten me on this

thank you

cheers,
vincent

Download Norah Jones, Eminem and more! http://www.msn.com.sg/ringtones/

You are currently subscribed to ntdev as: xxxxx@stratus.com To
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