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    Resolve a Missing or Duplicate .bzvol Error
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      Resolve a Missing or Duplicate .bzvol Error

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        Article Summary

        Backblaze Computer Backup creates a unique file called .bzvol at the root of each hard drive that you back up. This file helps identify the drives that are included in the backup. If this file is damaged or missing, it can cause errors.

        Cloning a drive that is selected for backup can also cause the .bzvol file to be cloned. Having two different drives with the same .bzvol ID confuses the Backblaze client. If you do clone your drives, you should exclude the .bzvol file from your cloning software and also remove the .bzvol file from the cloned drive. 

        Remove a .bzvol File on a Mac

        1. Open Finder.
        2. Press Shift + Command + . to reveal hidden files.
        3. Open the root of the drive in Finder.
        4. Select any instances of .bzvol, and move them to the trash.

        Resolve a Drive that Appears Twice

        1. Ensure that all of the external drives that are selected for backup are connected to your computer.
        2. Restart your computer.
        3. Within five minutes of starting your computer, open Backblaze system preferences.
        4. Click Settings.
        5. In the list of hard drives to back up, select the drive in question (even if that drive is listed as "unplugged"). If there are duplicate entries for the same drive, select all of them.
        6. If Backblaze alerts you that one drive will replace the other, click OK.
        7. Click OK to accept the changes.
        8. Restart your computer and allow it to run for at least four hours.
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