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<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta name="description" content="升级过程中断电，如何继续升级 现象 主系统升级程序过程中断电，设备重启后未继续进行升级。Recovery 系统升级程序过程中断电，设备重启后能继续进行升级。 原因分析 Recovery 系统升级程序过程中断电，设备重启后能继续进行升级，这是因为当用户执行升级脚本命令后，升级过程信息会被更新保存在环境变量里。 Recovery 系统升级主系统程序过程中断电，程序默认执行 ..."/><meta name="DC.rights.owner" content="(C) 版权 2025"/><meta name="copyright" content="(C) 版权 2025"/><meta name="generator" content="DITA-OT"/><meta name="DC.type" content="topic"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-12-04"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="id"/><title>常见问题</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content=""/><meta name="wh-source-relpath" content="topics/sdk/ota/ota_faq.dita"/><meta name="wh-out-relpath" content="topics/sdk/ota/ota_faq.html"/>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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/ota/ota_faq.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">常见问题</h1><div class="date inPage">4 Dec 2024</div><div style="color: gray;"></div><div class="- topic/body body"><section class="- topic/section section" id="id__id2" data-ofbid="id__id2"><h2 class="- topic/title title sectiontitle">升级过程中断电，如何继续升级</h2>
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<div class="- topic/div div section" id="id__id3"><strong class="+ topic/ph hi-d/b ph b">现象</strong>
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<p class="- topic/p p" data-ofbid="d212808e26__20250121171640">主系统升级程序过程中断电，设备重启后未继续进行升级。Recovery 系统升级程序过程中断电，设备重启后能继续进行升级。</p></div><div class="- topic/div div section" id="id__id4"><strong class="+ topic/ph hi-d/b ph b">原因分析</strong>
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<ul class="- topic/ul ul" id="id__ul_qkc_rp5_4dc" data-ofbid="id__ul_qkc_rp5_4dc"><li class="- topic/li li" data-ofbid="d212808e33__20250121171640">
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<p class="- topic/p p" data-ofbid="d212808e35__20250121171640">Recovery
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系统升级程序过程中断电，设备重启后能继续进行升级，这是因为当用户执行升级脚本命令后，升级过程信息会被更新保存在环境变量里。</p>
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<p class="- topic/p p" data-ofbid="d212808e38__20250121171640">Recovery 系统升级主系统程序过程中断电，程序默认执行 <span class="+ topic/ph sw-d/filepath ph filepath">./usr/lib/swupdate/swupdate_cmd.sh
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</span> 命令，可以继续升级。</p>
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</li><li class="- topic/li li" data-ofbid="d212808e44__20250121171640">
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<p class="- topic/p p" data-ofbid="d212808e46__20250121171640">主系统升级程序过程中断电，设备重启没有继续进行升级，这是因为主系统升级 Recovery
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系统程序过程中断电，主系统重新启动，环境变量虽然存在，没有自动执行
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<span class="+ topic/ph sw-d/filepath ph filepath">./usr/lib/swupdate/swupdate_cmd.sh </span>
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命令，启动继续升级过程。</p>
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</li></ul></div><div class="- topic/div div section" id="id__id5"><strong class="+ topic/ph hi-d/b ph b">应对方法</strong>
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<p class="- topic/p p" data-ofbid="d212808e56__20250121171640">主系统升级程序过程中断电，执行 <span class="+ topic/ph sw-d/filepath ph filepath">./usr/lib/swupdate/swupdate_cmd.sh </span>
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命令，可以继续中断的升级过程。 </p></div>
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</section><section class="- topic/section section" id="id__mtd" data-ofbid="id__mtd"><h2 class="- topic/title title sectiontitle"> 使用流控方式升级镜像文件到 mtd 分区失败原因</h2>
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<div class="- topic/div div section" id="id__id6">
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<strong class="+ topic/ph hi-d/b ph b">现象</strong>
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<p class="- topic/p p" data-ofbid="d212808e72__20250121171640">使用流控方式升级镜像文件到 UBI 分区可以正常升级，使用流控方式升级镜像文件到 mtd 分区失败。</p>
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</div>
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<div class="- topic/div div section" id="id__id7"><strong class="+ topic/ph hi-d/b ph b">原因分析</strong>
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<p class="- topic/p p" data-ofbid="d212808e80__20250121171640">UBI 分区设备是字符设备，mtd 分区是块设备，不能使能流控方式。</p>
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</div>
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</section><section class="- topic/section section" id="id__webmtd" data-ofbid="id__webmtd"><h2 class="- topic/title title sectiontitle"> 使用 WEB 方式升级镜像文件到 mtd 分区失败原因</h2>
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<div class="- topic/div div section" id="id__id8">
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<strong class="+ topic/ph hi-d/b ph b">现象</strong>
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<p class="- topic/p p" data-ofbid="d212808e94__20250121171640">使用 WEB 方式升级镜像文件到 mtd 分区，之前升级正常，改变镜像大小后，升级失败了。</p>
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</div>
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<div class="- topic/div div section" id="id__id9">
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<strong class="+ topic/ph hi-d/b ph b">原因分析</strong>
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<p class="- topic/p p" data-ofbid="d212808e103__20250121171640">mtd 分区是块设备，不能使能流控方式，需要先下载对应的升级镜像到内存上，镜像大小改变后，如果内存空间不够用，升级会失败。</p>
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</div>
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<div class="- topic/div div section" id="id__id10">
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<strong class="+ topic/ph hi-d/b ph b">应对方法</strong>
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<p class="- topic/p p" data-ofbid="d212808e112__20250121171640">保证有足够的内存空间放置烧录镜像文件。</p>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#id__id2" data-tocid="id__id2">升级过程中断电，如何继续升级</a></div></li><li class="section-item"><div class="section-title"><a href="#id__mtd" data-tocid="id__mtd"> 使用流控方式升级镜像文件到 mtd 分区失败原因</a></div></li><li class="section-item"><div class="section-title"><a href="#id__webmtd" data-tocid="id__webmtd"> 使用 WEB 方式升级镜像文件到 mtd 分区失败原因</a></div></li></ul></div>
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