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For File Structure: 5. Unallocated Space Bitmap shall be used to indicate a space set. Unallocated Space Table, Freed Space Table and Freed Space Bitmap shall not be recorded. 6. Non-Allocatable Space Stream shall be recorded. 7. ICB Strategy type 4 shall be used. 8. Short Allocation Descriptors or the embedded data shall be recorded in the Allocation Descriptors field of the File Entry or Extended File Entry. Long Allocation Descriptors shall not be recorded in this field. 6.12.3 Requirements for DVD-R The requirements for DVD-R discs under Disc at once recording mode and under Incremental recording mode are based on UDF 2.00. The volume and file structure is simplified as for write once discs using sequential recording. For Volume Structure: 1. Length of a packet shall be an integral multiple of 16 sectors (32 KB) and the first sector number of a packet shall be an integral multiple of 16. 2. Sparable Partition Map and Sparing Table shall not be recorded. 3. Under Incremental recording mode, only one Open Integrity Descriptor shall be recorded in the Logical Volume Integrity Sequence. 4. Under Incremental recording mode, Virtual Partition Map shall be recorded. For File Structure: 5. Unallocated Space Table, Unallocated Space Bitmap, Freed Space Table and Freed Space Bitmap shall not be recorded. 6. Only one File Set Descriptor shall be recorded. 7. Non-Allocatable Space Stream shall not be recorded. 8. Under Incremental recording mode, Virtual Allocation Table and VAT ICB shall be recorded. 9. Under Incremental recording mode, ICB Strategy type 4 shall be used. 10. Under Incremental recording mode, the VAT entries in VAT shall be assigned as follows: - The virtual address 0 shall be used for File Set Descriptor. - The virtual address 1 shall be used for the ICB of the root directory. - The virtual addresses in the range of 2 to 255 shall be assigned for the File Entry of DVD_RTAV directory and File Entries of files under the DVD_RTAV directory. 6.12.4 Requirements for Real-Time file recording on DVD discs DVD Video Recording specification defines the DVD specific sub-directory "DVD_RTAV" and all DVD specific files under the DVD_RTAV directory. DVD specific files consist of Real-Time files with the file type 249 and the related information files. UDF 2.01 149 March50 April
For Volume Structure: 1. For DVD-RAM/RW discs, a disc shall consist of a single volume with a single partition per side. For DVD-R discs, a disc shall consist of a single volume with a write once partition and a virtual partition per side. 2. For DVD-RW discs, First Sparing Table and Second Sparing Table shall be recorded. For File Structure: 3. For DVD-RAM/RW discs, only Unallocated Space Bitmap shall be used. 4. For DVD-RW discs, the extent of Unallocated Space Bitmap should have the length of Space Bitmap Descriptor for the available Data Recordable area. 5. Consumer Content Recorders record all their data in a special subdirectory, DVD_RTAV, located in the root directory. The DVD_RTAV directory and its contents have special file system restrictions which are defined in DVD Specifications published from DVD Format/Logo Licensing Corporation, see 6.9.3. An implementation or application should not create or modify files in this directory unless it meets the restrictions defined by DVD Specifications specified above. UDF 2.01 150 March50 April
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Universal Disk Format ® Specificat
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REVISION HISTORY 1.00 October 24, 1
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CONTENTS 1. INTRODUCTION ..........
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6.4 OSTA Compressed Unicode Algorit
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1. Introduction The OSTA Universal
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1.2 Compliance This document requir
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Media Block Address NOTE 1: This is
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1.3.3 Terms May Optional Shall Shou
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non-overlapping Partitions with 2 p
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2.1 Part 1 - General 2.1.1 Characte
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length of the field. The characters
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2.1.5.2 char Identifier[23] Unless
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The Suffix Type column in the above
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For an Application Entity Identifie
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2.2 Part 3 - Volume Structure 2.2.1
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NOTE: This field is used to determi
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2.2.4 Logical Volume Descriptor str
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2.2.5 Unallocated Space Descriptor
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EntityID. The scope of this EntityI
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2.2.7.2.2 dstring LogicalVolumeIden
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Layout of Type 2 partition map for
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• Bits 1-7: Reserved. Shall be se
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Virtual Allocation Table structure
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the offset and length of a partitio
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The Metadata Partition Map (see2.2.
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2.2.13.1 Metadata File (and Metadat
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2.2.13.4 Procedure for de-allocatin
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} struct EntityID byte byte Impleme
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2.3.2 File Set Descriptor struct Fi
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2.3.2.7 struct EntityID DomainIdent
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In order to assist a UDF implementa
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2.3.5.1 Uint16 StrategyType The co
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2.3.6 File Entry struct FileEntry {
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2.3.6.8 FileLinkCount Hard links to
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Descriptors should be used. For exa
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2.3.11.2 Uint32 PreviousAllocationE
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3.2 Part 3 - Volume Structure 3.2.1
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3.3 Part 4 - File System 3.3.1 File
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3.3.2.1.2 Macintosh Bits 6 & 7 (Set
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3.3.3 File Entry struct FileEntry {
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would be considered writable if the
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3.3.3.5 byte Extended Attributes Se
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ignored and the file creation time
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3.3.4.5.1.1 FreeEASpace This extend
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MacVolumeInfo format RBP Length Nam
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UDFFXInfo format (Volume IV, page 1
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The ApplicationUse area for this ex
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stream directory. If present, there
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Since the streams listed above have
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Object Logical Block Number is the
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mechanism for the host software to
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Vendor ID - The Vendor ID reported
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The OS2EA Stream contains a table o
Page 108 and 109: 4.2.2 File Identifier Descriptor st
Page 110 and 111: Definitions: A FileIdentifier shall
Page 112 and 113: 3. Invalid Characters: A FileIdenti
Page 114 and 115: 4. Trailing Periods and Spaces: All
Page 116 and 117: If there is a file extension then t
Page 118 and 119: defined as space that is not direct
Page 120 and 121: UDF 2.01 111 March50 April
Page 122 and 123: 6.2 UDF Entity Identifier Values En
Page 124 and 125: 8 0 BeOS - generic 9 0 Windows CE -
Page 126 and 127: } } returnValue = unicodeIndex; } r
Page 128 and 129: } return crc; #ifdef MAIN unsigned
Page 130 and 131: 6.6 Algorithm for Strategy Type 409
Page 132 and 133: nameLen = udfNameLen; } else { /* A
Page 134 and 135: } needsCRC = TRUE; /* Append the CR
Page 136 and 137: if (index < udfLabelLen || index ==
Page 138 and 139: UDF 2.01 129 March50 April
Page 140 and 141: unicode_t *udfName, /* (Input) Name
Page 142 and 143: } #ifdef (OS2 | WIN_95 | WIN_NT) /*
Page 144 and 145: 6.8 Extended Attribute Checksum Alg
Page 146 and 147: • The data of each file shall be
Page 148 and 149: Read the File Identifier Descriptor
Page 150 and 151: • An intermediate state is allowe
Page 152 and 153: • The host shall perform read/mod
Page 154 and 155: 6.10.2.6.3 Level 3 No restrictions
Page 156 and 157: ISO 9660 converted to UDF 1 st sess
Page 160 and 161: 6.13 Recommendations for DVD+R and
Page 162 and 163: 6.13.1.4.2 Anchor Volume Descriptor
Page 164 and 165: 6.13.2.1 Requirements • The packe
Page 166 and 167: 6.126.15 UDF Media Format Revision
Page 168 and 169: Description DCN Updated in UDF Revi
Page 170 and 171: Registration Form Disk Format Speci
Page 172 and 173: L Logical Block Size, 8, 9, 2425 Lo
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