TRACK_INFORMATION2 structure (scsi.h)
The TRACK_INFORMATION2 structure is used to report track information.
Syntax
typedef struct _TRACK_INFORMATION2 {
UCHAR Length[2];
UCHAR TrackNumberLsb;
UCHAR SessionNumberLsb;
UCHAR Reserved4;
UCHAR TrackMode : 4;
UCHAR Copy : 1;
UCHAR Damage : 1;
UCHAR Reserved5 : 2;
UCHAR DataMode : 4;
UCHAR FixedPacket : 1;
UCHAR Packet : 1;
UCHAR Blank : 1;
UCHAR ReservedTrack : 1;
UCHAR NWA_V : 1;
UCHAR LRA_V : 1;
UCHAR Reserved6 : 6;
UCHAR TrackStartAddress[4];
UCHAR NextWritableAddress[4];
UCHAR FreeBlocks[4];
UCHAR FixedPacketSize[4];
UCHAR TrackSize[4];
UCHAR LastRecordedAddress[4];
UCHAR TrackNumberMsb;
UCHAR SessionNumberMsb;
UCHAR Reserved7[2];
} TRACK_INFORMATION2, *PTRACK_INFORMATION2;
Members
Length[2]
The length, in bytes, of this structure.
TrackNumberLsb
The least significant byte of the track number.
SessionNumberLsb
The least significant byte of the session number.
Reserved4
Reserved.
TrackMode
The track mode. See the SCSI-3 Multi-Media specification for an explanation of meaning of this member.
Copy
The copy bit indicates whether the track is a copy or not. If this bit is 1, the track is a copy. If it is 0, the track is not a copy.
Damage
The damage bit indicates, together with the NWA_V bit, whether a write to the media is complete or not, and what sort of methods the CD-ROM class driver can use to complete the write. See the SCSI-3 Multi-Media specification for an explanation of how to interpret the values in the Damage and NWA_V members.
Reserved5
Reserved.
DataMode
The data mode. This member can have any of the following values:
| Value | Meaning |
| 0x1 | The track uses data mode 1 (ISO/IEC 10149) |
| 0x2 | The track uses data mode 2 (ISO/IEC 10149 or CD-ROM XA) |
| 0xf | There is no track descriptor block, and therefore the data block type of the track is unknown. |
FixedPacket
The fixed packet bit indicates, under some circumstances, when set to 1, that write operations to the track must use fixed packets. For a complete explanation of the meaning of this bit, see the SCSI Multimedia Commands - 3 (MMC-3) specification.
Packet
The fixed packet bit indicates, under some circumstances, when set to 1, that write operations to the track must use fixed packets. For a complete explanation of the meaning of this bit, see the SCSI Multimedia Commands - 3 (MMC-3) specification.
Blank
The blank bit, when set to 1, indicates that the track contains no written data and last recorded address field is invalid. For a complete explanation of the meaning of this bit, see the SCSI Multimedia Commands - 3 (MMC-3) specification.
ReservedTrack
The reserved track bit, when 1, indicates that the track is reserved.
NWA_V
A boolean value that indicates, when 1, that the value in NextWritableAddress is valid. If 0, the value in NextWritableAddress is invalid.
LRA_V
A boolean value that indicates whether the LastRecordedAddress member is valid or not. If LRA_V is 1, the LastRecordedAddress member is valid. If 0, the LastRecordedAddress member is not valid.
Reserved6
Reserved.
TrackStartAddress[4]
The starting address of the specified track.
NextWritableAddress[4]
The logical block address of the next writable user block in the track specified by the track number (TrackNumberLsb and TrackNumberMsb).
FreeBlocks[4]
The maximum number of user data blocks that are available for recording in the track.
FixedPacketSize[4]
The blocking factor. This value The fixed packet size is valid only when the Packet and the FP bits are both set to one.
TrackSize[4]
Track Size is the number of user data blocks in the track.
LastRecordedAddress[4]
TrackNumberMsb
The most significant byte of the track number.
SessionNumberMsb
The most significant byte of the session number.
Reserved7[2]
Reserved7
Requirements
| Requirement | Value |
|---|---|
| Header | scsi.h (include Scsi.h, Minitape.h, Storport.h) |