{"id":25238,"date":"2024-06-02T16:35:22","date_gmt":"2024-06-02T07:35:22","guid":{"rendered":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/?p=25238"},"modified":"2024-06-02T16:35:22","modified_gmt":"2024-06-02T07:35:22","slug":"%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%83%88%e3%83%a9%e3%83%96%e3%83%ab","status":"publish","type":"post","link":"https:\/\/je1sgh.mydns.jp\/je1sghblog\/?p=25238","title":{"rendered":"\u30b5\u30fc\u30d0\u30fc\u4e0d\u5b89\u5b9a"},"content":{"rendered":"\n

下記のようにUSB HUBの故障かと思いましたが，予備用のHUBを使っても起動後しばらくしてシステムがハングアップしてしまいます．トラブルの原因の特定にはもう少し時間がかかりそうです．<\/p>\n\n\n\n

USB HUBの故障と推定（たぶん誤り）<\/h2>\n\n\n\n

某サーバーですが，本日電力系統への落雷が原因と思われる停電があり，数分後に復電しましたが，ブートしなくなりました．<\/p>\n\n\n\n

BIOS1<\/a><\/sup>本当はBIOSではないのですが，一般的なPCならBIOSなので，説明の省略も兼ねてそう記します．<\/span>のメッセージからブート用のメディアが見つからないようです．メインのSSDは，\/bootとROOTとの2パーティションなので，たぶん\/bootがファイル的に壊れたものと思い，他のLinuxマシン（以下 “作業用マシン” ）でfsckをかけました．致命的ではない軽微な修復がなされましたが，サーバーに繋いでも症状は変わりません．<\/p>\n\n\n\n

もう一度作業用マシンに繋いで\/bootとROOTもfsckをかけました．ext4のROOTは頑強で何の問題もありませんでした．念の為\/bootはフォーマットしたうえで今朝のバックアップをコピーしました．<\/p>\n\n\n\n

それでも症状は変わりません．これは本体かなと思い，サーバー機とほぼ同じスペックの予備機と入れ替えましたが，やはりブート用のメディアが見つかりません．<\/p>\n\n\n\n

これはひょっとしてと思い，USB3.0のHUBをとばしてSSDをサーバー本体に繋いだらブートしました．<\/p>\n\n\n\n

これは間違いなくUSB3.0HUBの故障です．予備用のUSB3.0HUBを使って従前と同じマスストレージの接続形態に戻したら，サーバーは無事にブートしました．<\/p>\n\n\n\n

当面はこの予備用のHUBを使いますが，安くて良さそうなUSB3.0HUBを探して注文することにします．<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e0b\u8a18\u306e\u3088\u3046\u306bUSB HUB\u306e\u6545\u969c\u304b\u3068\u601d\u3044\u307e\u3057\u305f\u304c\uff0c\u4e88\u5099\u7528\u306eHUB\u3092\u4f7f\u3063\u3066\u3082\u8d77\u52d5\u5f8c\u3057\u3070\u3089\u304f\u3057\u3066\u30b7\u30b9\u30c6\u30e0\u304c\u30cf\u30f3\u30b0\u30a2\u30c3\u30d7\u3057\u3066\u3057\u307e\u3044\u307e\u3059\uff0e\u30c8\u30e9\u30d6\u30eb\u306e\u539f\u56e0\u306e\u7279\u5b9a\u306b\u306f\u3082\u3046\u5c11\u3057\u6642\u9593\u304c\u304b\u304b\u308a\u305d\u3046\u3067\u3059\uff0e USB HUB\u306e\u6545\u969c\u3068\u63a8\u5b9a\uff08\u305f\u3076\u3093\u8aa4\u308a\uff09 \u67d0\u30b5\u30fc\u30d0\u30fc\u3067\u3059\u304c\uff0c\u672c\u65e5\u96fb\u529b\u7cfb\u7d71\u3078\u306e\u843d\u96f7\u304c\u539f\u56e0\u3068\u601d\u308f\u308c\u308b\u505c\u96fb\u304c\u3042\u308a\uff0c\u6570\u5206\u5f8c\u306b\u5fa9\u96fb\u3057\u307e\u3057\u305f\u304c\uff0c\u30d6\u30fc\u30c8\u3057\u306a\u304f\u306a\u308a\u307e\u3057\u305f\uff0e BIOS\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304b\u3089\u30d6\u30fc\u30c8\u7528\u306e\u30e1\u30c7\u30a3\u30a2\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u3088\u3046\u3067\u3059\uff0e\u30e1\u30a4\u30f3\u306eSSD\u306f\uff0c\/boot\u3068ROOT\u3068\u306e2\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306a\u306e\u3067\uff0c\u305f\u3076\u3093\/boot\u304c\u30d5\u30a1\u30a4\u30eb\u7684\u306b\u58ca\u308c\u305f\u3082\u306e\u3068\u601d\u3044\uff0c\u4ed6\u306eLinux\u30de\u30b7\u30f3\uff08\u4ee5\u4e0b “\u4f5c\u696d\u7528\u30de\u30b7\u30f3” \uff09\u3067fsck\u3092\u304b\u3051\u307e\u3057\u305f\uff0e\u81f4\u547d\u7684\u3067\u306f\u306a\u3044\u8efd\u5fae\u306a\u4fee\u5fa9\u304c\u306a\u3055\u308c\u307e\u3057\u305f\u304c\uff0c\u30b5\u30fc\u30d0\u30fc\u306b\u7e4b\u3044\u3067\u3082\u75c7\u72b6\u306f\u5909\u308f\u308a\u307e\u305b\u3093\uff0e \u3082\u3046\u4e00\u5ea6\u4f5c\u696d\u7528\u30de\u30b7\u30f3\u306b\u7e4b\u3044\u3067\/boot\u3068ROOT\u3082fsck\u3092\u304b\u3051\u307e\u3057\u305f\uff0eext4\u306eROOT\u306f\u9811\u5f37\u3067\u4f55\u306e\u554f\u984c\u3082\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\uff0e\u5ff5\u306e\u70ba\/boot\u306f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3057\u305f\u3046\u3048\u3067\u4eca\u671d\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u30b3\u30d4\u30fc\u3057\u307e\u3057\u305f\uff0e \u305d\u308c\u3067\u3082\u75c7\u72b6\u306f\u5909\u308f\u308a\u307e\u305b\u3093\uff0e\u3053\u308c\u306f\u672c\u4f53\u304b\u306a\u3068\u601d\u3044\uff0c\u30b5\u30fc\u30d0\u30fc\u6a5f\u3068\u307b\u307c\u540c\u3058\u30b9\u30da\u30c3\u30af\u306e\u4e88\u5099\u6a5f\u3068\u5165\u308c\u66ff\u3048\u307e\u3057\u305f\u304c\uff0c\u3084\u306f\u308a\u30d6\u30fc\u30c8\u7528\u306e\u30e1\u30c7\u30a3\u30a2\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\uff0e \u3053\u308c\u306f\u3072\u3087\u3063\u3068\u3057\u3066\u3068\u601d\u3044\uff0cUSB3.0\u306eHUB\u3092\u3068\u3070\u3057\u3066SSD\u3092\u30b5\u30fc\u30d0\u30fc\u672c\u4f53\u306b\u7e4b\u3044\u3060\u3089\u30d6\u30fc\u30c8\u3057\u307e\u3057\u305f\uff0e \u3053\u308c\u306f\u9593\u9055\u3044\u306a\u304fUSB3.0HUB\u306e\u6545\u969c\u3067\u3059\uff0e\u4e88\u5099\u7528\u306eUSB3.0HUB\u3092\u4f7f\u3063\u3066\u5f93\u524d\u3068\u540c\u3058\u30de\u30b9\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u63a5\u7d9a\u5f62\u614b\u306b\u623b\u3057\u305f\u3089\uff0c\u30b5\u30fc\u30d0\u30fc\u306f\u7121\u4e8b\u306b\u30d6\u30fc\u30c8\u3057\u307e\u3057\u305f\uff0e \u5f53\u9762\u306f\u3053\u306e\u4e88\u5099\u7528\u306eHUB\u3092\u4f7f\u3044\u307e\u3059\u304c\uff0c\u5b89\u304f\u3066\u826f\u3055\u305d\u3046\u306aUSB3.0HUB\u3092\u63a2\u3057\u3066\u6ce8\u6587\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3059\uff0e<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_daextam_enable_autolinks":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-25238","post","type-post","status-publish","format-standard","hentry","category-linux"],"publishpress_future_action":{"enabled":false,"date":"2026-05-04 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