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<div id="projectname">libaaruformat<span id="projectnumber"> 1.0</span>
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<div id="projectbrief">Aaru Data Preservation Suite - Format Library</div>
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<div class="headertitle"><div class="title">tape.h File Reference</div></div>
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<div class="contents">
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<p>Data structures for tape media support in Aaru disk images.
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<a href="#details">More...</a></p>
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<div class="textblock"><code>#include <stdint.h></code><br />
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<p><a href="tape_8h_source.html">Go to the source code of this file.</a></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-nested-classes" class="groupheader"><a id="nested-classes" name="nested-classes"></a>
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Data Structures</h2></td></tr>
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<tr class="memitem:TapeFileEntry" id="r_TapeFileEntry"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structTapeFileEntry.html">TapeFileEntry</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Describes a single logical file on a tape medium. <a href="structTapeFileEntry.html#details">More...</a><br /></td></tr>
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<tr class="memitem:TapeFileHeader" id="r_TapeFileHeader"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structTapeFileHeader.html">TapeFileHeader</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Header for a tape file metadata block containing file layout information. <a href="structTapeFileHeader.html#details">More...</a><br /></td></tr>
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<tr class="memitem:TapePartitionEntry" id="r_TapePartitionEntry"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structTapePartitionEntry.html">TapePartitionEntry</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Describes a single physical partition on a tape medium. <a href="structTapePartitionEntry.html#details">More...</a><br /></td></tr>
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<tr class="memitem:TapePartitionHeader" id="r_TapePartitionHeader"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structTapePartitionHeader.html">TapePartitionHeader</a></td></tr>
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<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Header for a tape partition metadata block containing partition layout information. <a href="structTapePartitionHeader.html#details">More...</a><br /></td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-typedef-members" class="groupheader"><a id="typedef-members" name="typedef-members"></a>
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Typedefs</h2></td></tr>
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<tr class="memitem:ade8125364d763d57d167c0b521beaf64" id="r_ade8125364d763d57d167c0b521beaf64"><td class="memItemLeft" align="right" valign="top">typedef struct TapeFileEntry </td><td class="memItemRight" valign="bottom"><a class="el" href="#ade8125364d763d57d167c0b521beaf64">TapeFileEntry</a></td></tr>
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<tr class="memitem:a0ce39d637f56346a0d859f94b8fc1f40" id="r_a0ce39d637f56346a0d859f94b8fc1f40"><td class="memItemLeft" align="right" valign="top">typedef struct TapeFileHeader </td><td class="memItemRight" valign="bottom"><a class="el" href="#a0ce39d637f56346a0d859f94b8fc1f40">TapeFileHeader</a></td></tr>
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<tr class="memitem:af947dbe92eb87a6bba23183f14686539" id="r_af947dbe92eb87a6bba23183f14686539"><td class="memItemLeft" align="right" valign="top">typedef struct TapePartitionEntry </td><td class="memItemRight" valign="bottom"><a class="el" href="#af947dbe92eb87a6bba23183f14686539">TapePartitionEntry</a></td></tr>
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<tr class="memitem:a4f28f93bd2166f390ec24f1c3525584f" id="r_a4f28f93bd2166f390ec24f1c3525584f"><td class="memItemLeft" align="right" valign="top">typedef struct TapePartitionHeader </td><td class="memItemRight" valign="bottom"><a class="el" href="#a4f28f93bd2166f390ec24f1c3525584f">TapePartitionHeader</a></td></tr>
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</table>
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<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Data structures for tape media support in Aaru disk images. </p>
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<p>This header defines structures used to represent tape-specific metadata in the Aaru image format. Tape media differs from disk media in several key ways:</p>
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<p><b>Tape Organization:</b></p><ul>
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<li>Tapes are organized into sequential blocks rather than random-access sectors</li>
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<li>Multiple logical files can exist on a single tape</li>
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<li>Tapes may be divided into multiple partitions</li>
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<li>Files are defined by contiguous ranges of blocks within a partition</li>
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</ul>
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<p><b>File Structure:</b> Tape files are logical groupings of blocks that represent discrete data units. Each file has:</p><ul>
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<li>A unique file number identifying it within its partition</li>
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<li>A partition number indicating which physical partition contains it</li>
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<li>A block range (FirstBlock to LastBlock, inclusive) defining its extent</li>
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</ul>
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<p><b>Partition Structure:</b> Tape partitions are physical divisions of the tape medium. Each partition:</p><ul>
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<li>Has a unique partition number</li>
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<li>Contains a contiguous range of blocks</li>
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<li>Can contain multiple files or none</li>
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<li>May have different formatting or characteristics</li>
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</ul>
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<p><b>Block Addressing:</b> Block numbers are sequential within a partition, starting from 0. The FirstBlock and LastBlock values are inclusive, meaning both boundary blocks are part of the file or partition. For example, a file with FirstBlock=100 and LastBlock=199 contains 100 blocks (blocks 100 through 199 inclusive).</p>
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<p><b>Use Cases:</b></p><ul>
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<li>Archiving legacy tape media (DAT, DLT, LTO, QIC, etc.)</li>
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<li>Preserving tape structure for restoration to physical media</li>
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<li>Forensic imaging of tape evidence</li>
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<li>Migration of tape archives to modern storage</li>
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<li>Documentation of tape organization for archival purposes</li>
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</ul>
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<p><b>Storage in Aaru Images:</b> The tape metadata blocks (<a class="el" href="structTapeFileHeader.html" title="Header for a tape file metadata block containing file layout information.">TapeFileHeader</a> and <a class="el" href="structTapePartitionHeader.html" title="Header for a tape partition metadata block containing partition layout information.">TapePartitionHeader</a>) are optional structural blocks written during image finalization. They allow readers to understand the logical organization of the tape without parsing the entire data stream.</p>
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<dl class="section note"><dt>Note</dt><dd>All structures in this file use packed alignment (#pragma pack(push, 1)) to ensure consistent on-disk layout across different compilers and platforms.</dd>
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<dd>
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Block addresses are 0-based and partition numbers typically start from 0 (though some tape formats may use 1-based numbering).</dd></dl>
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<dl class="section see"><dt>See also</dt><dd><a class="el" href="enums_8h.html#a54420623f26ab6bb61042b41cccf37a3" title="List of known block types contained in an Aaru image.">BlockType</a> for the identifier constants used in <a class="el" href="structTapeFileHeader.html" title="Header for a tape file metadata block containing file layout information.">TapeFileHeader</a> and <a class="el" href="structTapePartitionHeader.html" title="Header for a tape partition metadata block containing partition layout information.">TapePartitionHeader</a> </dd></dl>
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<p class="definition">Definition in file <a class="el" href="tape_8h_source.html">tape.h</a>.</p>
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</div><a name="doc-typedef-members" id="doc-typedef-members"></a><h2 id="header-doc-typedef-members" class="groupheader">Typedef Documentation</h2>
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<a id="ade8125364d763d57d167c0b521beaf64" name="ade8125364d763d57d167c0b521beaf64"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#ade8125364d763d57d167c0b521beaf64">◆ </a></span>TapeFileEntry</h2>
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<td class="memname">typedef struct TapeFileEntry TapeFileEntry</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a0ce39d637f56346a0d859f94b8fc1f40">◆ </a></span>TapeFileHeader</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#af947dbe92eb87a6bba23183f14686539">◆ </a></span>TapePartitionEntry</h2>
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<td class="memname">typedef struct TapePartitionEntry TapePartitionEntry</td>
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<h2 class="memtitle"><span class="permalink"><a href="#a4f28f93bd2166f390ec24f1c3525584f">◆ </a></span>TapePartitionHeader</h2>
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<td class="memname">typedef struct TapePartitionHeader TapePartitionHeader</td>
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<li class="navelem"><a href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a href="dir_aeff2545c9dfcfc842fe9d84b123cb31.html">aaruformat</a></li><li class="navelem"><a href="dir_6387aeb6e475a334d8dc12d69f21999e.html">structs</a></li><li class="navelem"><a href="tape_8h.html">tape.h</a></li>
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<li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.14.0 </li>
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