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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/linux/burn-image-partition-table.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">分区表描述</h1><div class="date inPage">25 Dec 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><p class="- topic/p p" id="concept_mtx_tk3_pzb__p_hlr_sr2_f1c" data-ofbid="concept_mtx_tk3_pzb__p_hlr_sr2_f1c"><span class="+ topic/ph sw-d/filepath ph filepath">image_cfg.json</span> 文件的开头描述的是当前要烧录的目标存储设备，以及在设备上的分区配置，以
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<span class="+ topic/keyword pr-d/parmname keyword parmname">spi-nand</span> 为例：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_mtx_tk3_pzb__codeblock_fvp_3r2_f1c" data-ofbid="concept_mtx_tk3_pzb__codeblock_fvp_3r2_f1c"><span class="hl-string">"spi-nand"</span>: { <em class="hl-comment">// Device, The name should be the same with string in image:info:media:type</em>
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<span class="hl-string">"size"</span>: <span class="hl-string">"128m"</span>, <em class="hl-comment">// Size of SPI NAND</em>
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<span class="hl-string">"partitions"</span>: {
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<span class="hl-string">"spl"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"1m"</span> },
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<span class="hl-string">"os"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"2m"</span> },
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<span class="hl-string">"rodata"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"4m"</span> },
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<span class="hl-string">"data"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"28m"</span> },
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},
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},</pre><p class="- topic/p p" data-ofbid="d183352e32__20250121171625">该示例中各字段具体描述如下表所示：</p><div class="table-container"><table class="- topic/table table frame-all" id="concept_mtx_tk3_pzb__table_p1q_b2c_jzb" data-ofbid="concept_mtx_tk3_pzb__table_p1q_b2c_jzb" data-cols="3"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">分区表描述</span></caption><colgroup><col style="width:18.76955161626695%"/><col style="width:10.427528675703858%"/><col style="width:70.8029197080292%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__1">字段</th><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__2">值类型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__3">描述</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__1"><var class="+ topic/keyword sw-d/varname keyword varname">media type</var></td><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__2">String</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__3">
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<p class="- topic/p p" data-ofbid="d183352e58__20250121171625">存储设备类型</p>
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<p class="- topic/p p" data-ofbid="d183352e61__20250121171625">该字段名字仅可使用此列表所指定的名字。</p>
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<ul class="- topic/ul ul" id="concept_mtx_tk3_pzb__ul_vsx_cjc_jzb" data-ofbid="concept_mtx_tk3_pzb__ul_vsx_cjc_jzb"><li class="- topic/li li" data-ofbid="d183352e65__20250121171625"><span class="+ topic/keyword pr-d/parmname keyword parmname">mmc</span>：eMMC 和 SD Card 设备</li><li class="- topic/li li" data-ofbid="d183352e69__20250121171625"><span class="+ topic/keyword pr-d/parmname keyword parmname">spi-nand</span>：SPI NAND 存储设备</li><li class="- topic/li li" data-ofbid="d183352e73__20250121171625"><span class="+ topic/keyword pr-d/parmname keyword parmname">spi-nor</span>：SPI NOR 存储设备</li></ul>
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</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__1"><span class="+ topic/keyword pr-d/parmname keyword parmname">size</span></td><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__2">String</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__3"><span class="+ topic/keyword pr-d/parmname keyword parmname">存储设备</span>的存储大小 (byte)，可设置。设备的存储大小 (Byte)，单位可为 K、M 或 G
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，例如，8G。</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__1"><span class="+ topic/keyword pr-d/parmname keyword parmname">partitions</span></td><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__2">Object</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__3"><span class="+ topic/keyword pr-d/parmname keyword parmname">分区表</span>对象。包含该存储设备的详细分区列表，每一个子对象为一个分区。</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__1"><span class="+ topic/keyword pr-d/parmname keyword parmname">offset</span></td><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__2">String</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__3">16 进制字符串。表示该分区 的开始位置离存储设备
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的开始位置的偏移（字节）。如果此字段未出现，表示当前分区紧接上一个分区。</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__1"><span class="+ topic/keyword pr-d/parmname keyword parmname">size</span></td><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__2">String</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__3"><span class="+ topic/keyword pr-d/parmname keyword parmname">size</span>：设备的存储大小 (Byte)，单位可为 K、M 或 G
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，例如，2m。<p class="- topic/p p" data-ofbid="d183352e116__20250121171625">最后一个分区可以使用 “-” 表示使用剩下所有的空间。</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__1"><span class="+ topic/keyword pr-d/parmname keyword parmname">ubi</span></td><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__2">Object</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_mtx_tk3_pzb__table_p1q_b2c_jzb__entry__3"><span class="+ topic/keyword pr-d/parmname keyword parmname">UBI Volume</span> 对象。当存储设备为
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<kbd class="+ topic/ph sw-d/userinput ph userinput">spi-nand</kbd> 时出现，表示当前 MTD 分区是一个 UBI 设备。该对象描述 UBI
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设备中的 Volume 表。每一个子对象为一个 <span class="+ topic/keyword pr-d/parmname keyword parmname">UBI Volume</span>
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。<div class="- topic/p p" data-ofbid="d183352e134__20250121171625"><span class="+ topic/keyword pr-d/parmname keyword parmname">UBI Volume</span>对象：<ul class="- topic/ul ul" id="concept_mtx_tk3_pzb__ul_axq_pfc_jzb" data-ofbid="concept_mtx_tk3_pzb__ul_axq_pfc_jzb"><li class="- topic/li li" data-ofbid="d183352e139__20250121171625"><span class="+ topic/ph ui-d/uicontrol ph uicontrol">offset</span>：值为 16 进制字符串。表示该
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<span class="+ topic/keyword pr-d/parmname keyword parmname">Volume</span> 的开始位置离
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<span class="+ topic/keyword pr-d/parmname keyword parmname">MTD</span> 分区的开始位置的偏移（字节）。如果
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<span class="+ topic/keyword pr-d/parmname keyword parmname">offset</span>不出现，表示当前 Volume 紧接上一个
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Volume。</li><li class="- topic/li li" data-ofbid="d183352e152__20250121171625"><span class="+ topic/keyword pr-d/parmname keyword parmname">size</span>：设备的存储大小 (byte)，单位为 K、M 或 G
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，例如，2m。<p class="- topic/p p" data-ofbid="d183352e156__20250121171625">最后一个分区可以使用 “-” 表示使用剩下所有的空间。</p></li></ul></div></td></tr></tbody></table></div></div></article></main></div>
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