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<h3><a href="/article/e7-ad-86-e8-a8-98-e7-b0-a1-e5-96-ae-e5-88-a9-e7-94-a8-e9-9b-99-e6-a7-bd-e7-a1-ac-e7-a2-9f-e5-a4-96-e6-8e-a5-e5-ba-95-e5-ba-a7-e9-85-8d-e5-90-88-e7-be-a4-e6-9a-89nas-e9-81-94-e5-88-b0-e7-95-b0/">[筆記] 簡單利用雙槽硬碟外接底座配合 群暉 NAS 達到異地備援</a></h3>
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<span class="date moment">2013-03-26</span>
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<a href="/categories/%E5%B7%A5%E4%BD%9C%E7%AD%86%E8%A8%98">工作筆記</a>
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</div>
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<p>前陣子的內湖機房大樓失火問題，又再次凸顯了「異地備援」的重要性。</p>
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<p>雖說那次的案件是頻寬方面的問題，不過也提醒我現在公司內資料備份還沒有真正異地備援的事實。</p>
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<p>以往作異地備援，最大的問題就是頻寬不足以及REMOTE端設備的投資費用。以現有資料量約1000G來看，即使是用中華電信的100M/100M的光纖線路，真的要sync完1000G，第一次也都要跑上好幾個小時甚至好幾天，而之後每次的sync則依照設備運算能力而定。</p>
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<p>一直以來，就因為這兩個問題卡著，讓異地備援在我公司內都只是個口號，毫無實際作為..<img src="http://www.cowbay.org/wp-content/plugins/ultimate-tinymce/addons/emotions/img/popobig/tired.png" alt="So Tired" title="So Tired" /></p>
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<p>不過，之前逛網站的時候，偶然發現一個東西</p>
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<p></p>
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<p>就是這個！(學小叮噹掏口袋..</p>
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<p>雙插槽的硬碟外接底座！</p>
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<p><a href="http://www.cowbay.org/wp-content/uploads/2013/03/cyberslim-dual-slot.png"><img src="http://www.cowbay.org/wp-content/uploads/2013/03/cyberslim-dual-slot.png" alt="cyberslim-dual slot" /></a></p>
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<p>簡單來說，這東西可以讓你直接由A硬碟複製到B硬碟，那我的想法是什麼呢？<img src="http://www.cowbay.org/wp-content/plugins/ultimate-tinymce/addons/emotions/img/popobig/boss.png" alt="Big Boss" title="Big Boss" /></p>
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<p>準備事項：</p>
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<ol>
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<li>值日人員兩枚</li>
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<li>備份用硬碟三枚</li>
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<li>機房備份紀錄表
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</li>
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</ol>
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<p>操作方法大概是這樣</p>
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<p>先把硬碟分為同步用(A硬碟) 、 B1(值日生一號)、B2(值日生二號)，把B1/B2分配給值日人員</p>
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<p>1.在群暉NAS上有個備份功能，可以將NAS資料都備份到外接硬碟，所以設定這樣一個備份工作，將NAS資料都備份到外接硬碟A</p>
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<p>2.每天來上班，當天值日人員先進機房，按下同步按鈕，讓底座把A硬碟的資料抄一份到 B硬碟去，時間依資料量而定，一般來說，速度大概在4Gb/min 左右。整個同步完大概兩個小時出頭吧(印象中</p>
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<p>3.每天下班時，每天值日人員進機房，把B硬碟拔走帶回家。</p>
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<p>4.隔天值日人員上班，操作步驟二</p>
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<p>當然，備份記錄記得要填..</p>
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<p>很簡單吧，果然不愧我號稱是金頭腦呢！<img src="http://www.cowbay.org/wp-content/plugins/ultimate-tinymce/addons/emotions/img/popobig/big_smile.png" alt="Big Smile" title="Big Smile" /></p>
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<p>不過，人算向來不如天算啊…</p>
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<p>東西買好了，計畫寫好了，開始測試，馬上就碰到問題了。</p>
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<p>這種底座的CLONE功能，只有在offline的時候，才能作同步，也就是說，複製的時候，底座不能和NAS連接，這樣才可以。我實在不懂這是哪門子的設計，原本的計畫，值日生只要抽換硬碟、按下同步鈕就好了，現在多了個抽拔線路的動作，抽插我會記得啦，抽拔…可能就超過我腦容量了<img src="http://www.cowbay.org/wp-content/plugins/ultimate-tinymce/addons/emotions/img/popobig/cry.png" alt="Crying" title="Crying" /></p>
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<p>所以計畫A失敗，要再找其他方式</p>
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<p> </p>
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<hr />
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<p>在測試A計畫時，意外發現如果兩顆硬碟都接在底座上時，在NAS的備份計畫，來源可以分別選擇外接硬碟A和外接硬碟B。既然硬碟對拷的作法失敗，那就改用同步來處理。</p>
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<p>1.兩顆硬碟都接在底座上，在NAS備份計畫中，設定兩組備份工作，每星期一三五備份到A硬碟，二四六備份到B硬碟。</p>
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<p>2.值日生一號，固定就是帶走A硬碟，值日生二號，就固定帶走B硬碟。</p>
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<p>3.每天進辦公室，就分別依照分配的順序，把硬碟插回去/拔走，同時順便檢查另一顆硬碟在不在，可以提醒同事沒有依照計畫實行。</p>
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<p>理論上來說，資料會同時存在三份，NAS、底座上的硬碟、值日生帶走的硬碟。這樣的資料備援應該是足夠的了。</p>
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<p>要注意的地方</p>
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<p>1.Backup windows ，晚上十點開始備份，隔天早上九點來換硬碟，九個小時內要能同步完</p>
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<p>2.同步狀況要有LOG</p>
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<p>3.硬碟要保管好…</p>
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<a href="/tags/nas">NAS</a>
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<a href="/tags/synology">synology</a>
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<a href="/tags/%E7%95%B0%E5%9C%B0%E5%82%99%E6%8F%B4">異地備援</a>
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<a href="/tags/%E7%BE%A4%E6%9A%89">群暉</a>
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<a href="/categories/%E7%AD%86%E8%A8%98">筆記 (30)</a>
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</li>
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<li>
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<a href="/categories/%E5%89%AA%E5%A0%B1">剪報 (18)</a>
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</li>
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<li>
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<a href="/categories/starting">Starting (5)</a>
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</li>
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<li>
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<a href="/categories/blog">Blog (4)</a>
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</li>
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<div class="right">
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<div class="external-profiles">
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<strong>Social media</strong>
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<a href="https://twitter.com/TheRealLednerb" target="_blank"><i class="fa fa-twitter-adblock-proof"></i></a>
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<a href="https://github.com/Lednerb" target="_blank"><i class="fa fa-github"></i></a>
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<div class="languages">
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<strong>Other languages</strong>
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<a href="/en" class="active">en</a>
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<a href="/de">de</a>
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</footer>
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<div class="credits">
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<div class="container">
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<div class="copyright">
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<a href="https://github.com/Lednerb" target="_blank">
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©
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2017
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by Lednerb
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</a>
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</div>
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<div class="author">
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<a href="https://github.com/Lednerb/bilberry-hugo-theme" target="_blank">Bilberry Hugo Theme</a>
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<script type="text/javascript" src="https://h.cowbay.org/js/externalDependencies.39c47e10e241eae2947b3fe21809c572.js" integrity="md5-OcR+EOJB6uKUez/iGAnFcg=="></script>
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<script type="text/javascript" src="https://h.cowbay.org/js/theme.ff50ae6dc1bfc220b23bf69dbb41b54e.js" integrity="md5-/1CubcG/wiCyO/adu0G1Tg=="></script>
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<script>
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$(".moment").each(function() {
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$(this).text(
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moment( $(this).text() )
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.locale( "en" )
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.format('LL')
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);
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$(".footnote-return sup").html("");
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</script>
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<script>
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var client = algoliasearch("Y2C4RWMPXW", "50ea7f8c41c0ad233926e0be2b769ed1");
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var index = client.initIndex("default-content");
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$('#search').autocomplete({ hint: false, autoselect: true, debug: false },
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[
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{
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source: $.fn.autocomplete.sources.hits(index, { hitsPerPage: 5, filters: 'language: en' }),
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displayKey: function(suggestion) {
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return suggestion.title || suggestion.author
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},
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templates: {
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suggestion: function(suggestion) {
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return "<span class='entry " + suggestion.type + "'>"
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+ "<span class='title'>" + suggestion.title + "</span>"
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+ "<span class='fa fa-fw " + suggestion.iconClass + "'></span>"
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+ "</span>"
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;
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},
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empty: function() {
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return "<span class='empty'>Nothing found.</span>"
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},
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footer: function() {
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return '<div class="branding">Powered by <img src="https:\/\/h.cowbay.org\/dist\/algolia-logo-light.svg" /></div>'
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}
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}
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])
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window.location = (suggestion.url);
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window.location = (suggestion.url);
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}
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