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Backup Runs 9 Hours Then Fails after 99% Complete- Unable To Locate Disc

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This has happened my last 3 weekly backups. I have run diagnostic software on the external hard drive, and it has passed. I replaced the last hard drive because of this, but I have the same unable to locate disc error with this drive too. It occurs after backup is 99% complete. Please see screen shot of my last backup log. After failing at this late stage I manually ordered Validation which succeeded.

The problem may be with my computer with the USB controller or something. Any suggestions shall be appreciated.

See attached file.

Anhang Größe
last_2_backups_details.jpg 377.29 KB
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Is this a "green" drive or drive with power-management features?

Have you assigned a permanent drive letter to that drive?

This Drive is (J) Drive. It is a Western Digital My Book 2TB USB 2.0 drive. It was NTFS formated via windows format before it was designated to Acronis to receive backups. It has been configured to have Acronis backup the internal drive (C) every Thursday at 2AM with an incremental method of full, incremental, incremental, full,... The WD Backup Software is not in use- thus, it is a plug and play drive. It has backed up 9 versions of the volume on (C) although the last 3 have failed 7 hours into the backup for failure to locate (J). I manually validated the failed volume at this point with success on the last 2 occasions. Please see the attached screenshots of the log and drive health.

Anhang Größe
173247-112384.jpg 341.99 KB
173247-112387.jpg 209.3 KB
173247-112390.jpg 362.68 KB

This Drive is (J) Drive. It is a Western Digital My Book 2TB USB 2.0 drive. It was NTFS formated via windows format before it was designated to Acronis to receive backups. It has been configured to have Acronis backup the internal drive (C) every Thursday at 2AM with an incremental method of full, incremental, incremental, full,... The WD Backup Software is not in use- thus, it is a plug and play drive. It has backed up 9 versions of the volume on (C) although the last 3 have failed 7 hours into the backup for failure to locate (J). I manually validated the failed volume at this point with success on the last 2 occasions. Please see the attached screenshots of the log and drive health.

Anhang Größe
173249-112393.jpg 341.99 KB
173249-112396.jpg 209.3 KB
173249-112399.jpg 362.68 KB

Please post a picture of your backup scheme. Is it set to use consolidation settings?