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Validating a backup shows the backup as being corrupted

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I just remade my backups and for good measure I thought I would validate it to check out everything is OK. To my surprise True Image reported immediately that the backup was corrupted. The warning went away when I closed the notification though and the drive icon got the green checkmark back.

Then I tried booting into my rescue USB stick and the validation went through OK.

Now, which report can/should I trust? Or is there some additional thing I'm missing here?

I'm using Windows 8 and I'm doing the backup on an external e-SATA drive.

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If the image validates from the bootable Rescue Media, and that validation is repeatable, then I wouldn't worry too much.

"Corrupted" is, unfortunately, a rather non-specific error message, in spite of its rather specific sounding term. It really just means that ATI can't validate the archive, which can be caused by disk errors or connection errors, rather than any problems with the .tib file itself.

I guess there's just some process or whatever messing with the disk or the software on the OS side so it can't validate it in Windows? But yeah the rescue software works so I guess I'm good to go. Thanks.

To be sure, restore a couple of files from the backup. That's a good test.

I can't restore anything through Windows. The restore fails. I'll have to test the rescue media again.

I could however mount the image and the files showed up and worked.