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How to Safely Convert Dynamic Disk to Basic in Windows 11!

Accidentally converted to dynamic disk on Windows 11...

We will explain how to return to basic disk without erasing data.

We also introduce restrictions on disk management and safe conversion procedures using the convenient tool "Partition Assistant."

# Windows 11 Dynamic Disk Basic Disc Disk Management PC Trouble

2025/8/12 Edited to

... Read moreダイナミックディスクとは、複数の物理ディスクをひとつのプールとして扱える便利な機能ですが、Windows11の起動や一部ソフトの動作にはベーシックディスクが必須となるケースがあります。特にデュアルシステムを導入したい場合や、FATファイルシステムを使いたいときは注意が必要です。 筆者も以前、誤ってSSDをダイナミックディスクに変換してしまい、起動しなくなるトラブルを経験しました。そこで学んだのは、Windowsの標準の「ディスクの管理」ツールでは、空のダイナミックディスクのみ無料でベーシックへ変換可能という点ですが、データが入っているディスクは追加のツールが必要になるということです。 そこでおすすめしたいのが「Partition Assistant」という無料ツールです。このソフトはシステムディスクでもデータディスクでも、データを消さずにダイナミックからベーシックへ安全に変換できるのが特徴です。筆者もこのツールで問題を解決できましたので、信頼して使えます。 さらに、変換前には必ずバックアップを取ることが重要です。増分バックアップや差分バックアップの違いを理解し、必要に応じてSSDのクローン作成も検討すると安心です。また、Windows11のセキュリティ機能(TPM 2.0)やパーティションの管理設定もあらかじめ確認しておくと、トラブル回避につながります。 お使いのPC環境や目的に合わせて安全にダイナミックディスクの変換を行い、快適なWindows11ライフをサポートしましょう。

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