SCSI command

NTDEV
1

Hi All.

I need to pass to CD drive SCSI command and I know mounted drive letter. How
to get pointer to device object which could proceed SCSI commands. Is CDFS
driver could proceed SCSI commands?

Thanx in advance.

2

Yes, CDFS will pass these commands down to the storage stack.
Just open ??\E: - or \.\E: in Win32.

Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

“ntdev” wrote in message
news:…
> Hi All.
>
> I need to pass to CD drive SCSI command and I know mounted drive letter. How
> to get pointer to device object which could proceed SCSI commands. Is CDFS
> driver could proceed SCSI commands?
>
> Thanx in advance.
>
>
>
> —
> Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com

3

Do not open \.\e:\ however. CDFS may not bother passing down I/O
controls sent to the root directory.

-p

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Maxim
S. Shatskih
Sent: Tuesday, August 31, 2004 12:49 AM
To: Windows System Software Devs Interest List
Subject: Re: [ntdev] SCSI command

Yes, CDFS will pass these commands down to the storage stack.
Just open ??\E: - or \.\E: in Win32.

Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

“ntdev” wrote in message
> news:…
> > Hi All.
> >
> > I need to pass to CD drive SCSI command and I know mounted drive
> > letter. How to get pointer to device object which could
> proceed SCSI
> > commands. Is CDFS driver could proceed SCSI commands?
> >
> > Thanx in advance.
> >
> >
> >
> > —
> > Questions? First check the Kernel Driver FAQ at
> http://www.osronline.com/article.cfm?id=256
> >
> > You are currently subscribed to ntdev as: xxxxx@storagecraft.com To
> > unsubscribe send a blank email to xxxxx@lists.osr.com
>
>
> —
> Questions? First check the Kernel Driver FAQ at
> http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as:
> xxxxx@windows.microsoft.com To unsubscribe send a blank
> email to xxxxx@lists.osr.com
>

4

Surely.
\.\E:\ - the root directory on the E: volume, which is serviced by the
filesystem
\.\E: - the special “DASD volume” file from the filesystem point of view,
the FSD will pass all IOCTLs down from such a file.

Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

----- Original Message -----
From: “Peter Wieland”
To: “Windows System Software Devs Interest List”
Sent: Tuesday, August 31, 2004 9:11 PM
Subject: RE: [ntdev] SCSI command

> Do not open \.\e:\ however. CDFS may not bother passing down I/O
> controls sent to the root directory.
>
> -p
>
> > -----Original Message-----
> > From: xxxxx@lists.osr.com
> > [mailto:xxxxx@lists.osr.com] On Behalf Of Maxim
> > S. Shatskih
> > Sent: Tuesday, August 31, 2004 12:49 AM
> > To: Windows System Software Devs Interest List
> > Subject: Re: [ntdev] SCSI command
> >
> > Yes, CDFS will pass these commands down to the storage stack.
> > Just open ??\E: - or \.\E: in Win32.
> >
> > Maxim Shatskih, Windows DDK MVP
> > StorageCraft Corporation
> > xxxxx@storagecraft.com
> > http://www.storagecraft.com
> >
> > “ntdev” wrote in message
> > news:…
> > > Hi All.
> > >
> > > I need to pass to CD drive SCSI command and I know mounted drive
> > > letter. How to get pointer to device object which could
> > proceed SCSI
> > > commands. Is CDFS driver could proceed SCSI commands?
> > >
> > > Thanx in advance.
> > >
> > >
> > >
> > > —
> > > Questions? First check the Kernel Driver FAQ at
> > http://www.osronline.com/article.cfm?id=256
> > >
> > > You are currently subscribed to ntdev as: xxxxx@storagecraft.com To
> > > unsubscribe send a blank email to xxxxx@lists.osr.com
> >
> >
> > —
> > Questions? First check the Kernel Driver FAQ at
> > http://www.osronline.com/article.cfm?id=256
> >
> > You are currently subscribed to ntdev as:
> > xxxxx@windows.microsoft.com To unsubscribe send a blank
> > email to xxxxx@lists.osr.com
> >
>
> —
> Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as: unknown lmsubst tag argument: ‘’
> To unsubscribe send a blank email to xxxxx@lists.osr.com
>

5

It is very common to send SCSI commands directly to a CD/DVD device
using the drive letter as the device being opened. Simply open the the
handle using the \.\ version of the path:

HANDLE cd = CreateFile(“\\.\E:”,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);

This handle can then be used to send CDBs using IOCTL_SCSI_PASS_THROUGH
and/or IOCTL_SCSI_PASS_THROUGH_DIRECT. This handle can also be used to
dismount the file system using FSCTL_LOCK_VOLUME and/or
FSCTL_DISMOUNT_VOLUME, which may be important depending upon the
particular commands you want to send to the device.

Hope that helps,
.

This posting is provided “AS IS” with no warranties, and confers no
rights. Use of included script samples are subject to the terms
specified at
http://www.microsoft.com/info/cpyright.htm

-----Original Message-----
From: ntdev [mailto:xxxxx@ukr.net]
Sent: Tuesday, August 31, 2004 12:36 AM
Subject: SCSI command

Hi All.

I need to pass to CD drive SCSI command and I know mounted drive letter.
How
to get pointer to device object which could proceed SCSI commands. Is
CDFS
driver could proceed SCSI commands?

Thanx in advance.