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From: Uwe Sieber on 8 Jul 2006 13:35

User mode question, just hoping for competent audience here...


When I call GetDriveType with a device path like
\\?\USBSTOR#DISK&VEN_SANDISK&PROD_U3_CRUZER_MICRO&REV_2.15#....
then it returns DRIVE_CDROM for CD-ROMs and DRIVE_FIXED for fixed
drive. But for removable drive it does not return DRIVE_REMOVABLE,
it returns DRIVE_FIXED instead.

The docs say

lpRootPathName
[in] Pointer to a null-terminated string that specifies the root
directory of the disk to return information about.

But what is a root directory? Call with a volume name
like \\?\Volume{GUID}\ works as expected but is a device
path a valid root directory too?

Should calling GetDriveType with a device path work
or should I tread it a unsupported?


Thanks and Greetings from Germany

Uwe




From: Scherbina Vladimir on 10 Jul 2006 06:12
Hello Uwe.

To determine whether a drive is a USB-type drive, you should call
SetupDiGetDeviceRegistryProperty and specify the SPDRP_REMOVAL_POLICY
property.

Look at MSDN:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/getdrivetype.asp

--
Vladimir

"Uwe Sieber" <mail(a)uwe-sieber.de> wrote in message
news:4ha8ovF1ptsh1U1(a)individual.net...
>
> User mode question, just hoping for competent audience here...
>
>
> When I call GetDriveType with a device path like
> \\?\USBSTOR#DISK&VEN_SANDISK&PROD_U3_CRUZER_MICRO&REV_2.15#....
> then it returns DRIVE_CDROM for CD-ROMs and DRIVE_FIXED for fixed
> drive. But for removable drive it does not return DRIVE_REMOVABLE,
> it returns DRIVE_FIXED instead.
>
> The docs say
>
> lpRootPathName
> [in] Pointer to a null-terminated string that specifies the root directory
> of the disk to return information about.
>
> But what is a root directory? Call with a volume name
> like \\?\Volume{GUID}\ works as expected but is a device
> path a valid root directory too?
>
> Should calling GetDriveType with a device path work
> or should I tread it a unsupported?
>
>
> Thanks and Greetings from Germany
>
> Uwe
>
>
>
>


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