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Last active April 10, 2019 02:55
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Repair TimeMachine Backup
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repair_timemachine_backup.md

Repair TimeMachine Backup

  1. Mount TimeMachine volume from Finder.

  2. Unlock Target Machine's Backup sparsebundle.

    sudo chflags -R nouchg /Volumes/{TimeMachine Volume Name}/{Target Machine's Name}.sparsebundle

  3. Attach sparsebundle then Listing Backup Volume.

    hdiutil attach -nomount -noverify -noautofsck /Volumes/{TimeMachine Volume Name}/{Target Machine's Name}.sparsebundle

  4. Repair backup volume.

    fsck_hfs -drfy /dev/disk2s2
    • Note: (Mojave~)
      Before running this command, you need to add /sbin/fsck_hfs to System Preferences -> Security & Privacy -> Full Disk Access.

  5. Detach backup sparsebundle.

    hdiutil detach /dev/disk2s2

  6. Fix TimeMachine state flag in following file.

    /Volumes/{TimeMachine Volume Name}/{Target Machine's Name}.sparsebundle/com.apple.TimeMachine.MachineID.plist

    • Delete following lines.

      <key>RecoveryBackupDeclinedDate</key>
<date>{Date}</date>

    • Replace following lines.

      <key>VerificationState</key>
<integer>2</integer>

      to

      <key>VerificationState</key>
<integer>0</integer>

  7. That's all!

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