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ファイルシステムをアンマウントできない

Solution Verified - Updated -

Issue

  • umount コマンドを使用してファイルシステムをアンマウントしても機能せず、次のエラーが表示されます。

    # umount /path/to/mount/point
    umount: /path/to/mount/point: device is busy
    
    # umount /path/to/mount/point
    umount: /path/to/mount/point: target is busy.
            (In some cases useful info about processes that use
             the device is found by lsof(8) or fuser(1))
    

Environment

  • Red Hat Enterprise Linux (RHEL)

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