FEATURE_DATA_WRITE_ONCE structure (ntddmmc.h)
The FEATURE_DATA_WRITE_ONCE structure holds information for the Write Once feature.
Syntax
typedef struct _FEATURE_DATA_WRITE_ONCE {
FEATURE_HEADER Header;
UCHAR LogicalBlockSize[4];
UCHAR Blocking[2];
UCHAR ErrorRecoveryPagePresent : 1;
UCHAR Reserved1 : 7;
UCHAR Reserved2;
} FEATURE_DATA_WRITE_ONCE, *PFEATURE_DATA_WRITE_ONCE;
Members
Header
Contains a FEATURE_HEADER structure with header information for this feature descriptor.
LogicalBlockSize[4]
Indicates the number of bytes per logical block. The bytes in this array are arranged in big-endian order. LogicalBlockSize[0] holds the most significant byte. LogicalBlockSize[3] holds the least significant byte.
Blocking[2]
Indicates the number of logical blocks per device. The bytes in this array are arranged in big-endian order. Blocking[0] holds the most significant byte. Blocking[1] holds the least significant byte.
ErrorRecoveryPagePresent
Indicates, when set to 1, that the Read/Write Error Recovery Mode Page is present. When set to zero, indicates that it might not be present. See the SCSI Multimedia 3 (MMC-3) specification for a description of this page.
Reserved1
Reserved.
Reserved2
Reserved.
Remarks
This structure holds data for the feature named "Write Once" by the MMC-3 specification. Devices that support this feature can write to any previously unused logical block.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddmmc.h (include Ntddcdrm.h) |