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If t<strong>here</strong> is a file extension then the new FileIdentifier shall be composed of up to the first (255 – (length of (new file extension) + 1 (for the ‘.’)) – 5 (for the #CRC)) characters constituting the file name at this step in the process, followed by the separator “#” (#0023); followed by a 4 digit CS0 Hex representation of the 16 –bit CRC of the original CS0 FileIdentifier, followed by “.” (#002E) and the file extension at this step in the process. Otherwise if t<strong>here</strong> is no file extension the new FileIdentifier shall be composed of up to the first (255 – 5 (for the new #CRC)) characters constituting the file name at this step in the process. Followed by the separator “#” (#0023); followed by a 4 digit CS0 hex representation of the 16-bit CRC of the original CS0 FileIdentifier. NoteNOTE: Invalid characters for OS/400 are only the forward slash “/” (#002F) character. Non-displayable characters for OS/400 are any characters that do not translate to code page 500 (EBCDIC Multilingual). UDF 2.01 107 March50 April
5. Informative 5.1 Descriptor Lengths The following table summarizes the UDF limitations on the lengths of the Descriptors described in ECMA 167. Descriptor Length in bytes Anchor Volume Descriptor Pointer 512 Volume Descriptor Pointer 512 Implementation Use Volume Descriptor 512 Primary Volume Descriptor 512 Partition Descriptor 512 Logical Volume Descriptor no max Unallocated Space Descriptor no max Terminating Descriptor 512 Logical Volume Integrity Descriptor no max File Set Descriptor 512 File Identifier Descriptor Maximum of a Logical Block Size Allocation Extent Descriptor 24 Indirect Entry 52 Terminal Entry 36 File Entry Maximum of a Logical Block Size Extended File Entry Maximum of a Logical Block Size Extended Attribute Header Descriptor 24 Unallocated Space Entry Maximum of a Logical Block Size Space Bit Map Descriptor no max Partition Integrity Entry N/A 5.2 Using Implementation Use Areas 5.2.1 Entity Identifiers Refer to section 2.1.5 on Entity Identifiers defined earlier in this document. 5.2.2 Orphan Space Orphan space may exist within a logical volume, but it is not recommended since some type of logical volume repair facility may reallocate it. Orphan space is UDF 2.01 108 March50 April
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Universal Disk Format ® Specificat
Page 3 and 4:
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
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 {
Page 82 and 83: would be considered writable if the
Page 84 and 85: 3.3.3.5 byte Extended Attributes Se
Page 86 and 87: ignored and the file creation time
Page 88 and 89: 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
Page 104 and 105: Vendor ID - The Vendor ID reported
Page 106 and 107: 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 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 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
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6.126.15 UDF Media Format Revision
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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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