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<h2 id="数据恢复基本常识">数据恢复基本常识<a aria-hidden="true" tabindex="-1" href="#数据恢复基本常识" class="internal"> §</a></h2>
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<p>首先对于电子文件的损坏，无外乎以下两种损坏的方式。</p>
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<h3 id="物理损毁">物理损毁<a aria-hidden="true" tabindex="-1" href="#物理损毁" class="internal"> §</a></h3>
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<p>就是指存储电子文件的物理硬件：磁带、磁盘、光盘等损毁，因为物理元件的损毁导致文件修复难度极大，所及基本上 99% 的物理损毁很难被修复，同时文件的价值也可能不值得我们去修复（物理损毁修复价格及其昂贵）。</p>
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<h3 id="逻辑损坏">逻辑损坏<a aria-hidden="true" tabindex="-1" href="#逻辑损坏" class="internal"> §</a></h3>
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<p>逻辑损坏有很多种，常见的就是电子文件被删除，覆盖，格式化等。逻辑损坏修复的可能性较大，同时修复的价值相对物理损毁较低，所以大部分的逻辑损坏都是可以尝试修复的，这也是我觉得能恢复上述的原因。</p>
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<h3 id="恢复方式">恢复方式<a aria-hidden="true" tabindex="-1" href="#恢复方式" class="internal"> §</a></h3>
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<p>大多逻辑损坏可以通过市面上常见的数据恢复软件修复，例如 DiskGenius 就一款专业级的数据恢复软件，同时也不乏其他好用的软件，需要各位自行体验了。</p>
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<h2 id="文件修复过程">文件修复过程<a aria-hidden="true" tabindex="-1" href="#文件修复过程" class="internal"> §</a></h2>
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<ol>
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<li>执法记录仪是惠普的 DSJ 系列之一，拥有官方的桌面管理工具，通过阅读说明书发现连接记录仪需要禁用驱动程序签名强制，具体操作可以 Google。</li>
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<li>连接执法记录仪，登录软件，进入 U 盘模式。</li>
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<li>通过使用数据恢复软件，查找到近两年的视频文件。</li>
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<li>恢复视频文件，发现视频文件无法打开。</li>
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<li>猜测视频文件头可能损坏，使用视频修复工具修复。</li>
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<li>文件修复成功，但视频错乱，只修复了部分帧数。</li>
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</ol>
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<p>首先在成功连接执法记录仪后，便先用了 DiskGenius，但发现恢复的是一些无用文件。便找到了另外一款，该软件成功恢复了视频文件的目录，所以我觉得还是挺有希望的。26G 的视频恢复了一个多小时，但是恢复之后只有几个视频文件可以打开。</p>
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<p>这个时候心凉了一半，觉得可能要出糗了。但是根据我多年的行业经验和直觉，我觉的还有救。使用十六进制编辑工具打开视频，果不其然有救。至于为什么有救，因为我之前逆向研究过 GIF 的文件格式，所以我猜测，文件头可能是损坏的，但是视频的部分帧数可能还没有被覆盖。但是现在去哪里找一个这样的工具，总不能现成写一个吧。</p>
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<p>不过还真就找到了这样的一个工具：Video Repair Tool，通过它我成功的修复了部分未覆盖的视频帧数 。后来还是没能帮上忙，执法视频文件在 1 月 17 日，我只找回来到 1 月 31 日的部分视频文件。</p>
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<h2 id="杂谈">杂谈<a aria-hidden="true" tabindex="-1" href="#杂谈" class="internal"> §</a></h2>
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<p>简单的描述了一下这次的文件恢复，其实我没有这项技能的。只是凭借多年的行业经验和直觉，我才揽下这个小 case 的。</p>
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<p>后来 Google 了一下，看到了挺多对数据恢复和销毁的观点。这里我也简单谈一下自己的看法，欢迎各位交流。</p>
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<p>对于销毁文件，因为电子文件是被人为的创造出来的，所以它不存在销毁的决无踪迹。但是你可以销毁它存在的记录，使其恢复的成本提高。为什么要这样说，因为毕竟猴子算法都存在可能性，所以任何文件都有被修复或创造范本的可能性存在。</p>
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<p>但是如何提高文件的恢复成本，网上有很多种说法：全覆盖 35 次，0 填充一次，扔进火堆哈哈。我认为在不损害物理硬件的前提下，理论上三次全覆盖擦写，找回的可能性就如同猴子算法的平均时间复杂度一样 O(n × n!)。</p>
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<p>希望大家多了解一下相关的知识，务必不要让自己的文件损毁。我之前一块 2T 移动硬盘坏掉了给我心疼的，心疼着心疼着我还是没想起来里面到底存了啥哈哈哈。</p>
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<blockquote>
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<p>硬盘有价、数据无价！</p>
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s-2-0.897-2-2s0.897-2,2-2S47,39.897,47,41z M49,10c-2.206,0-4-1.794-4-4s1.794-4,4-4s4,1.794,4,4S51.206,10,49,10z"></path></svg></div><div id="global-graph-outer"><div id="global-graph-container" data-cfg="{"drag":true,"zoom":true,"depth":-1,"scale":0.9,"repelForce":0.5,"centerForce":0.3,"linkDistance":30,"fontSize":0.6,"opacityScale":1,"showTags":true,"removeTags":[]}"></div></div></div><div class="toc desktop-only"><button type="button" id="toc" class><h3>Table of Contents</h3><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="fold"><polyline points="6 9 12 15 18 9"></polyline></svg></button><div id="toc-content"><ul class="overflow"><li class="depth-0"><a href="#数据恢复基本常识" data-for="数据恢复基本常识">数据恢复基本常识</a></li><li class="depth-1"><a href="#物理损毁" data-for="物理损毁">物理损毁</a></li><li class="depth-1"><a href="#逻辑损坏" data-for="逻辑损坏">逻辑损坏</a></li><li class="depth-1"><a href="#恢复方式" data-for="恢复方式">恢复方式</a></li><li class="depth-0"><a href="#文件修复过程" data-for="文件修复过程">文件修复过程</a></li><li class="depth-0"><a href="#杂谈" data-for="杂谈">杂谈</a></li></ul></div></div><div class="backlinks "><h3>Backlinks</h3><ul class="overflow"><li>No backlinks found</li></ul></div><div class="explorer mobile-only"><button type="button" id="explorer" data-behavior="collapse" data-collapsed="collapsed" data-savestate="true" data-tree="[{"path":"Basics","collapsed":true},{"path":"Basics/english","collapsed":true},{"path":"Blog","collapsed":true},{"path":"Book","collapsed":true},{"path":"Book/个人成长","collapsed":true},{"path":"Book/医学健康","collapsed":true},{"path":"Book/历史","collapsed":true},{"path":"Book/哲学宗教","collapsed":true},{"path":"Book/心理","collapsed":true},{"path":"Book/政治军事","collapsed":true},{"path":"Book/教育学习","collapsed":true},{"path":"Book/文学","collapsed":true},{"path":"Book/生活百科","collapsed":true},{"path":"Book/社会文化","collapsed":true},{"path":"Book/科学技术","collapsed":true},{"path":"Book/经济理财","collapsed":true},{"path":"Book/艺术","collapsed":true},{"path":"Book/计算机","collapsed":true},{"path":"Company","collapsed":true},{"path":"Company/信息化","collapsed":true},{"path":"Company/信息化/规范","collapsed":true},{"path":"Culture","collapsed":true},{"path":"Government","collapsed":true},{"path":"Government/中国","collapsed":true},{"path":"Government/中国/标准","collapsed":true},{"path":"Government/中国/法律","collapsed":true},{"path":"Journal","collapsed":true},{"path":"Journal/2022","collapsed":true},{"path":"Journal/2022/W34","collapsed":true},{"path":"Journal/2022/W35","collapsed":true},{"path":"Journal/2022/W36","collapsed":true},{"path":"Journal/2022/W37","collapsed":true},{"path":&qu
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|
|
const collapsed2 = parent.classList.contains(`is-collapsed`);
|
|||
|
|
const height2 = collapsed2 ? parent.scrollHeight : parent.scrollHeight + current.scrollHeight;
|
|||
|
|
parent.style.maxHeight = height2 + `px`;
|
|||
|
|
current = parent;
|
|||
|
|
parent = parent.parentElement;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
function setupCallout() {
|
|||
|
|
const collapsible = document.getElementsByClassName(
|
|||
|
|
`callout is-collapsible`
|
|||
|
|
);
|
|||
|
|
for (const div of collapsible) {
|
|||
|
|
const title = div.firstElementChild;
|
|||
|
|
if (title) {
|
|||
|
|
title.removeEventListener(`click`, toggleCallout);
|
|||
|
|
title.addEventListener(`click`, toggleCallout);
|
|||
|
|
const collapsed = div.classList.contains(`is-collapsed`);
|
|||
|
|
const height = collapsed ? title.scrollHeight : div.scrollHeight;
|
|||
|
|
div.style.maxHeight = height + `px`;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
document.addEventListener(`nav`, setupCallout);
|
|||
|
|
window.addEventListener(`resize`, setupCallout);
|
|||
|
|
</script><script type="module">
|
|||
|
|
import mermaid from 'https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.esm.min.mjs';
|
|||
|
|
const darkMode = document.documentElement.getAttribute('saved-theme') === 'dark'
|
|||
|
|
mermaid.initialize({
|
|||
|
|
startOnLoad: false,
|
|||
|
|
securityLevel: 'loose',
|
|||
|
|
theme: darkMode ? 'dark' : 'default'
|
|||
|
|
});
|
|||
|
|
document.addEventListener('nav', async () => {
|
|||
|
|
await mermaid.run({
|
|||
|
|
querySelector: '.mermaid'
|
|||
|
|
})
|
|||
|
|
});
|
|||
|
|
</script><script src="https://cdn.jsdelivr.net/npm/katex@0.16.7/dist/contrib/copy-tex.min.js" type="application/javascript"></script><script src="../postscript.js" type="module"></script></html>
|