DEVICE_TRIM_DESCRIPTOR structure (ntddstor.h)
The DEVICE_TRIM_DESCRIPTOR structure is used in conjunction with the IOCTL_STORAGE_QUERY_PROPERTY request to retrieve the trim descriptor data for a device.
Syntax
typedef struct _DEVICE_TRIM_DESCRIPTOR {
ULONG Version;
ULONG Size;
BOOLEAN TrimEnabled;
} DEVICE_TRIM_DESCRIPTOR, *PDEVICE_TRIM_DESCRIPTOR;
Members
Version
Contains the size of the structure DEVICE_TRIM_DESCRIPTOR. The value of this member will change as members are added to the structure.
Size
Specifies the total size of the descriptor, in bytes.
TrimEnabled
Specifies whether trim is enabled for the device.
Remarks
Storage class drivers issue a device-control request with the I/O control code IOCTL_STORAGE_QUERY_PROPERTY to retrieve this structure, which contains trim information for the device. The structure can be retrieved either from the device object for the bus or from an FDO, which forwards the request to the underlying bus.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddstor.h (include Ntddstor.h) |