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How to Repair HDD Bad Sectors! Compatible with Windows 11 / 10 / 8 / 7

Is there any error 0x8078012D or 0x8007045D in bad sectors of HDD?

If it is Windows, it can be repaired with "sfc / scannow"!

With the free tool Partition Assistant, you can easily check and repair bad sectors with a click.

Check now and protect your data!

# HDD # bad sectors # repair # windows Computer Repair

2025/9/11 Edited to

... Read more私が「バックアップに失敗しました(0x8007045D / 0x8078012D)」に当たったとき、結論から言うと“いきなり修復”より先に「データ退避」と「状態確認」を優先した方が安全でした。不良セクタ(バッドセクタ)は、HDDの初期不良・ヘッド破損・磁性体の劣化・突然の電源断・衝撃などで起きやすく、放置すると読み書きエラーが増えていきます。 まずやったのは、可能な範囲で重要データを別ドライブにコピーすること。エラーでコピーが止まる場合は、無理に何度も再試行せず、優先順位の高いフォルダから小分けに退避しました。ここで重要なのが「CHKDSKのリスクと対策」です。/r などの強い修復オプションはセクタの検査・再配置を行うため、劣化が進んだHDDだと処理中に状態が悪化する可能性があります。対策としては、(1)先に退避、(2)ノートPCはAC接続、(3)可能なら別PC/外付けケースで実行、(4)途中で止まっても電源断しない、を意識しました。 不良セクタ修復コマンドとして試す順番は、個人的に次の流れが安心でした。 1) 管理者でコマンドプロンプトを開き、まずは軽めに「chkdsk C: /f」 2) システム側の整合性確認として「sfc /scannow」 3) それでも読み取りエラーが続く、またはイベントビューアにディスクエラーが出る場合は「chkdsk C: /r」(実行時間が長いので、時間とリスクを見て判断) 「Windows11でchkdskできない」ケースもあり、私の環境では“使用中のボリュームなので次回起動時に実行しますか?”が出ました。Yで予約して再起動すれば動くことが多いです。それでも進まないときは、Windows回復環境(詳細オプション→コマンドプロンプト)から実行すると通る場合がありました。 また、パーティション管理ソフト(例:Partition Assistant)の「パーティションをチェック」機能は、GUIで状況把握しやすく、どの領域でエラーが出やすいかの切り分けに便利でした。クリック操作でチェックできるので、コマンドが不安な人ほど助かると思います。 最後に、HDDの不良セクタは“完全に元通り”というより「隔離してこれ以上使わないようにする」イメージに近いです。修復後もエラーが再発する、異音がする、SMARTで警告が出る場合は、早めにクローン作成→交換まで含めて検討するのが安全でした。SSDの不良セクタ疑いでも、まずはバックアップ優先で、無理に書き込みを増やさないのがポイントです。

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