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following file is available for download from the Microsoft Download
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Release Date: Sept.
21, 2000
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119591 How to Obtain Microsoft Support Files from Online Services
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The Enumdisk1.exe file contains the following files:
File Description
--------------------------
Enumdisk.c Implements the Win32 application to enumerate the disk devices.
Enumdisk.h Header file for Enumdisk.c
Sources DDK build instructions
Enumdisk.htm The documentation for these samples (this file)
Enumdisk.exe Windows 2000 executable program (Free build)
Device Enumeration
The Enumdisk1.exe sample uses the Setup class
GUID_DEVCLASS_DISKDRIVE globally unique identifier (GUID) to enumerate all the disk
devices that are installed in the system. The sample then obtains the Device ID
by getting the Registry properties.
The handle to the device is
needed to send IOCTLs from a Win32 application. The device handle can be
obtained by opening the device with the device interface name. The disk class
driver exposes this interface by registering the device interface. It uses the
DiskClassGuid interface GUID for device registration. A Win32 application can
obtain this interface name by using the
SetupDi APIs with the same interface GUID. By performing this in a loop,
all the registered disk interfaces can be obtained. Because this value is
obtained from the disk class driver, this technique works for all types of disk
devices, such as SCSI, Integrated Device Electronics (IDE), Universal Serial
Bus (USB), and Institute for Electrical and Electronics Engineers (IEEE) 1394.
Device Properties
IOCTL_STORAGE_QUERY_PROPERTY can be used to get the adapter and device properties,
respectively. This IOCTL takes the
STORAGE_PROPERTY_QUERY data structure as an argument. Before calling this IOCTL, the
STORAGE_PROPERTY_ID and
STORAGE_QUERY_TYPE members must be set accordingly. The
STORAGE_PROPERTY_ID can be set to either
StorageAdapterProperty or
StorageDeviceProperty, and it determines the property to be returned. This data
structure and its member values are defined in \Ntddk\Src\Ntddstor.h.
Calling this
StorageAdapterProperty IOCTL returns the
STORAGE_ADAPTER_DESCRIPTOR data structure, which contains such adapter properties as the Bus
Type, Maximum Transfer Length, Alignment Mask, and so on.
StorageDeviceProperty returns the
STORAGE_DEVICE_DESCRIPTOR data structure, which contains the Device Type, Vendor ID,
Product ID, and so on. This information is obtained from the respective port
driver. Refer to the Windows 2000 DDK documentation for more information about
this IOCTL and data structures.
SCSI Pass-Through Interface
The device handle obtained in this way can also be used to send
SCSI pass-through commands to the device. The sample sends the
Inquiry command to the device to get the
Inquiry data. Refer to the SPTI sample, which is available in the Windows
2000 DDK, for more information on the SCSI pass-through interface.
Building the Sample
Click the
Free Build Environment or
Checked Build Environment icon under the Development Kits program group to set the basic
environment variables that are needed by the Build utility.
Change
to the folder that contains the device source code, for example:
Run the Build utility by typing
build
-cz, or use the
BLD macro. This method invokes the Microsoft make routines that
produce log files named Build
xxx.log, Build
xxx.wrn, and Build
xxx.err if there are any warnings or errors.
Note that
xxx stands for "fre" or "chk" depending on the environment chosen. If
the build succeeds, the executable Enumdisk.exe file is placed in a
platform-specific subfolder of your %TargetPath% folder that is specified in
the Sources file.
Running the Enumdisk1.exe Sample
This sample does not require any arguments. Run the sample from a
command-prompt window; all the disk device properties will be listed.
