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DEVICE_TRIM_DESCRIPTOR structure (ntddstor.h)

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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)

See also

IOCTL_STORAGE_QUERY_PROPERTY