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defined as space that is not directly or indirectly referenced by any of the nonimplementation use descriptors defined in ECMA 167. NOTE: Any allocated extent for which the only reference resides within an implementation use field is considered orphan space. 5.3 Boot Descriptor T.B.D. 5.4 Clarification of Unrecorded Sectors ECMA 167 section 3/8.1.2.2 states Any unrecorded constituent sector of a logical sector shall be interpreted as containing all #00 bytes. Within the sector containing the last byte of a logical sector, the interpretation of any bytes after that last byte is not specified by this Part. A logical sector is unrecorded if the standard for recording allows detection that a sector has been unrecorded and all of the logical sector’s constituent sectors are unrecorded. A logical sector should either be completely recorded or unrecorded. For the purposes of interchange, UDF must clarify the correct interpretation of this section. This part specifies that an unrecorded sector logically contains #00 bytes. However, the converse argument that a sector containing only #00 bytes is unrecorded is not implied, and such a sector is not an “unrecorded” sector for the purposes of ECMA. Only the standard governing the recording of sectors on the media can provide the rule for determining if a sector is unrecorded. For example, a blank check condition would provide correct determination for a WORM device. The following additional ECMA 167 sections reference the rule defined 3/8.1.2.2: 3/8.4.2, 3/8.8.2, 4/3.1, 4/8.3.1 and 4/8.10. By derivation, UDF 6.6paragraph 6.6 (strategy 4096) is also affected. Since unrecorded sectors/blocks are terminating conditions for sequences of descriptors, an implementation must be careful to know that the underlying storage media provides a notion of unrecorded sectors before assuming that not writing to a sector is detectable. Otherwise, reliance on the incorrect converse argument mentioned above may result. Explicit termination descriptors must be used when an appropriate unrecorded sector would be undetectable. UDF 2.01 109 March50 April
5.5 Technical Contacts Technical questions regarding this document may be emailed to the OSTA File Interchange Committee at info@osta.org. Also technical questions may be faxed to the attention of the OSTA File Interchange Committee at 1-805-962-1542. OSTA may also be contacted through the following address: File Interchange Committee Chairman OSTA 311 East Carrillo Street Santa Barbara, CA 93101 (805) 963-3853 Also monitor the OSTA web site at www.osta.org for additional information. UDF 2.01 110 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 {
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 116 and 117: If there is a file extension then t
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
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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