Windows 7 Backup error 0x8078012D when about two thirds through a complete backup to a USB connected external hard drive
I recently purchased a Win 7 64 bit HP laptop and upon initial setup the native Backup was working fine for both complete and file backups to a USB connected external hard drive. As I was running out of space on the external 1 TB hard drive while transitioning files from my old system I ran a quick format on the external hard drive thinking that Windows Backups would just re create it's structures as required. I used to do this regularly on Vista. I now get errors when running any backup (files or complete) to the external hard drive. It makes it quite a ways (2/3rds or more) through the backup and then gives the error: "The operation failed due to a device error encountered with either the source or the destination. If the soruce or destination volume is on a dsik, run CHKDSK /R on the source or destination volume, and then retry the operation. Details: The request could not be performed because of an I/O device error." Error Code: 0x8078012D I now know that you can manage backup setups in Win 7 via the Backup interface and probably should have removed the backups that way. The system still thinks the backups are there in my opinion. I have tried re-running several times, reformatted the drive, tried a different USB connected drive, etc... to no avail. I'm thinking I need to somehow reset Windows Backup to think it has no indexes and re-create them but don't know how. CHKDSK on the C drive and external drive run fine. I am using Norton's backup utility now to ensure I atleast get a file backup to the external drive and it works fine. I don't think it's a hardware problem, rather Windows being confused given that I formatted the drive and it still thinks via indexes there are backups there. Windows Update patches are current and I have experience no other issues transferring files to this external drive. Norton 360 is installed but was also installed originally while the backups were working and no config changes have been made to it since. Any thoughts or suggestions would definitely be appreciated.
December 26th, 2010 9:25pm

Please have a look to the resolution mentioned in this thread about the 0x8078012D error. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration
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December 27th, 2010 11:37am

Tried it all. Nothing fixed the problem. - Both Volume Shadow Copy and Backup services were already set to manual. - chkdsk /r on both the source and target drives did not help. - Renaming or removing the WindowsImageBackup directory did not work. - Disabling Norton 360 did not work Any other ideas?
December 29th, 2010 6:26pm

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