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non-overlapping Partitions with 2 prevailing Partition Descriptors only if one has an access type of read onlyRead-Only and the other has an access type of Rewritable, Overwritable, or WORM. Write-Once. The Logical Volume for this volume would consist of the contents of both partitions. Logical Volume Descriptor There shall be exactly one prevailing Logical Volume Descriptor recorded per Volume Set. The LogicalVolumeIdentifier field shall not be null and should contain an identifier that aids in the identification of the logical volume. Specifically, software generating volumes conforming to this specification shall not set this field to a fixed or trivial value. Duplicate disks, which are intended to be identical, may contain the same value in this field. This field is extremely important in logical volume identification when multiple media are present within a jukebox. This name is typically what is displayed to the user. Logical Volume Integrity Descriptor Unallocated Space Descriptor File Set Descriptor ICB Tag File Identifier Descriptor File Entry Allocation Descriptors Allocation Extent Descriptors Unallocated Space Entry Space Bitmap Descriptor Partition Integrity Entry Volume Descriptor Sequence Extent The LogicalVolumeDescriptor recorded on the volume where the PrimaryVolumeDescriptor’s VolumeSequenceNumber field is equal to 1 (one) must have a NumberofPartitionMaps value and PartitionMaps structure(s) that represent the entire logical volume. For example, if a volume set is extended by adding partitions, then the updated LogicalVolumeDescriptor written to the last volume in the set must also be written (or rewritten) to the first volume of the set. Shall be recorded. The extent of LVIDs may be terminated by the extent length. A single prevailing Unallocated Space Descriptor shall be recorded per volume. There shall be exactly one File Set Descriptor recorded per Logical Volume on Rewritable/Overwritable media. For WORM media multiple File Set Descriptors may be recorded based upon certain restrictions defined in this document. The FSD extent may be terminated by the extent length. Only strategy types 4 or 4096 shall be recorded. The total length of a File Identifier Descriptor shall not exceed the size of one Logical Block. The total length of a File Entry shall not exceed the size of one Logical Block. Only Short and Long Allocation Descriptors shall be recorded. The length of any single extent of allocation descriptors shall not exceed the Logical Block Size. The total length of an Unallocated Space Entry shall not exceed the size of one Logical Block. CRC not required. Shall not be recorded. Both the main and reserve volume descriptor sequence UDF 2.01 9 March50 April
extents shall each have a minimum length of 16 logical sectors. The VDS Extent may be terminated by the extent length. Record Structure Record structure files, as defined in part 5 of ECMA 167, shall not be created. UDF 2.01 10 March50 April
Page 1 and 2: Universal Disk Format ® Specificat
Page 3 and 4: REVISION HISTORY 1.00 October 24, 1
Page 6 and 7: CONTENTS 1. INTRODUCTION ..........
Page 8 and 9: 6.4 OSTA Compressed Unicode Algorit
Page 10 and 11: 1. Introduction The OSTA Universal
Page 12 and 13: 1.2 Compliance This document requir
Page 14 and 15: Media Block Address NOTE 1: This is
Page 16 and 17: 1.3.3 Terms May Optional Shall Shou
Page 20 and 21: 2.1 Part 1 - General 2.1.1 Characte
Page 22 and 23: length of the field. The characters
Page 24 and 25: 2.1.5.2 char Identifier[23] Unless
Page 26 and 27: The Suffix Type column in the above
Page 28 and 29: For an Application Entity Identifie
Page 30 and 31: 2.2 Part 3 - Volume Structure 2.2.1
Page 32 and 33: NOTE: This field is used to determi
Page 34 and 35: 2.2.4 Logical Volume Descriptor str
Page 36 and 37: 2.2.5 Unallocated Space Descriptor
Page 38 and 39: EntityID. The scope of this EntityI
Page 40 and 41: 2.2.7.2.2 dstring LogicalVolumeIden
Page 42 and 43: Layout of Type 2 partition map for
Page 44 and 45: • Bits 1-7: Reserved. Shall be se
Page 46 and 47: Virtual Allocation Table structure
Page 48 and 49: the offset and length of a partitio
Page 50 and 51: The Metadata Partition Map (see2.2.
Page 52 and 53: 2.2.13.1 Metadata File (and Metadat
Page 54 and 55: 2.2.13.4 Procedure for de-allocatin
Page 56 and 57: } struct EntityID byte byte Impleme
Page 58 and 59: 2.3.2 File Set Descriptor struct Fi
Page 60 and 61: 2.3.2.7 struct EntityID DomainIdent
Page 62 and 63: In order to assist a UDF implementa
Page 64 and 65: 2.3.5.1 Uint16 StrategyType The co
Page 66 and 67: 2.3.6 File Entry struct FileEntry {
Page 68 and 69:
2.3.6.8 FileLinkCount Hard links to
Page 70 and 71:
Descriptors should be used. For exa
Page 72 and 73:
2.3.11.2 Uint32 PreviousAllocationE
Page 74 and 75:
3.2 Part 3 - Volume Structure 3.2.1
Page 76 and 77:
3.3 Part 4 - File System 3.3.1 File
Page 78 and 79:
3.3.2.1.2 Macintosh Bits 6 & 7 (Set
Page 80 and 81:
3.3.3 File Entry struct FileEntry {
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would be considered writable if the
Page 84 and 85:
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
Page 90 and 91:
MacVolumeInfo format RBP Length Nam
Page 92 and 93:
UDFFXInfo format (Volume IV, page 1
Page 94 and 95:
The ApplicationUse area for this ex
Page 96 and 97:
stream directory. If present, there
Page 98 and 99:
Since the streams listed above have
Page 100 and 101:
Object Logical Block Number is the
Page 102 and 103:
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
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Definitions: A FileIdentifier shall
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3. Invalid Characters: A FileIdenti
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4. Trailing Periods and Spaces: All
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If there is a file extension then t
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defined as space that is not direct
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UDF 2.01 111 March50 April
Page 122 and 123:
6.2 UDF Entity Identifier Values En
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8 0 BeOS - generic 9 0 Windows CE -
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} } returnValue = unicodeIndex; } r
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} return crc; #ifdef MAIN unsigned
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6.6 Algorithm for Strategy Type 409
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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) /*
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6.8 Extended Attribute Checksum Alg
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• The data of each file shall be
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Read the File Identifier Descriptor
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• An intermediate state is allowe
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• The host shall perform read/mod
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6.10.2.6.3 Level 3 No restrictions
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ISO 9660 converted to UDF 1 st sess
Page 158 and 159:
For File Structure: 5. Unallocated
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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