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Read Error or Metadata Corrupted - bad or just annoying?

Beginner
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True Image 2017 Mac   V 3.3.8035 

iMac iMac (27-inch, Mid 2011) running OS X Sierra v10.12.5

backing up to a nearly-new external hard drive

occasionally throws a "READ ERROR OR METADATA CONTENT IS CORRUPTED" message. 

One time I ran Disk Utility First Aid, and retried the backup successfully. 

This latest time that didn't work, so I used Disk Utility to unmount and remount the drive. Retry succeeded. 

Can I safely write these off as just one of life's little annoyances? Or should I worry that I can't rely on my backups?  

 

Forum Hero
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mvp

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How is the external drive connected to the computer?  If USB 3.0 and your drive does not have it own power source I would suspect that as the issue.

Most external drives connecting via USB 3.0 have power requirements that exceed that of a single cable connection.  True Image will have issue with that.

Beginner
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It's USB 2.0, direct to computer as recommended by various sources.

Does not have its own power source. 

Forum Hero
Posts: 29
Comments: 5567
mvp

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You might try a different USB port if one is available.  Many case mounted ports are under powered, it is therefore recommended that ports directly attached to the motherboard are used if possible.