STORAGE_DEVICE_DESCRIPTOR structure (winioctl.h)
Used in conjunction with the IOCTL_STORAGE_QUERY_PROPERTY control code to retrieve the storage device descriptor data for a device.
Syntax
typedef struct _STORAGE_DEVICE_DESCRIPTOR {
DWORD Version;
DWORD Size;
BYTE DeviceType;
BYTE DeviceTypeModifier;
BOOLEAN RemovableMedia;
BOOLEAN CommandQueueing;
DWORD VendorIdOffset;
DWORD ProductIdOffset;
DWORD ProductRevisionOffset;
DWORD SerialNumberOffset;
STORAGE_BUS_TYPE BusType;
DWORD RawPropertiesLength;
BYTE RawDeviceProperties[1];
} STORAGE_DEVICE_DESCRIPTOR, *PSTORAGE_DEVICE_DESCRIPTOR;
Members
Version
Contains the size of this structure, in bytes. The value of this member will change as members are added to the structure.
Size
Specifies the total size of the descriptor, in bytes, which may include vendor ID, product ID, product revision, device serial number strings and bus-specific data which are appended to the structure.
DeviceType
Specifies the device type as defined by the Small Computer Systems Interface (SCSI) specification.
DeviceTypeModifier
Specifies the device type modifier, if any, as defined by the SCSI specification. If no device type modifier exists, this member is zero.
RemovableMedia
Indicates when TRUE that the device's media (if any) is removable. If the device has no media, this member should be ignored. When FALSE the device's media is not removable.
CommandQueueing
Indicates when TRUE that the device supports multiple outstanding commands (SCSI tagged queuing or equivalent). When FALSE, the device does not support SCSI-tagged queuing or the equivalent.
VendorIdOffset
Specifies the byte offset from the beginning of the structure to a null-terminated ASCII string that contains the device's vendor ID. If the device has no vendor ID, this member is zero.
ProductIdOffset
Specifies the byte offset from the beginning of the structure to a null-terminated ASCII string that contains the device's product ID. If the device has no product ID, this member is zero.
ProductRevisionOffset
Specifies the byte offset from the beginning of the structure to a null-terminated ASCII string that contains the device's product revision string. If the device has no product revision string, this member is zero.
SerialNumberOffset
Specifies the byte offset from the beginning of the structure to a null-terminated ASCII string that contains the device's serial number. If the device has no serial number, this member is zero.
BusType
Specifies an enumerator value of type STORAGE_BUS_TYPE that indicates the type of bus to which the device is connected. This should be used to interpret the raw device properties at the end of this structure (if any).
RawPropertiesLength
Indicates the number of bytes of bus-specific data that have been appended to this descriptor.
RawDeviceProperties[1]
Contains an array of length one that serves as a place holder for the first byte of the bus specific property data.
Remarks
An application can determine the required buffer size by issuing a IOCTL_STORAGE_QUERY_PROPERTY control code passing a STORAGE_DESCRIPTOR_HEADER structure for the output buffer, and then using the returned Size member of the STORAGE_DESCRIPTOR_HEADER structure to allocate a buffer of the proper size.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Header | winioctl.h (include Windows.h) |