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Error code 3266

Error code
3266
Type
Description
The backup data in is incorrectly formatted. Backups cannot be appended, but existing backup sets may still be usable.

Comments

EventID.Net
As per Microsoft, the backup data on the indicated media is incorrectly formatted. The likely cause is that a backup was interrupted, leaving the end of a disk backup file in an improperly terminated condition. The specific meaning of this error depends on the context in which it is returned:

- When returned in response to a backup statement, this error indicates that the operation failed and the backup was not created. Pre-existing backup sets on the media may be damaged and unusable.

- When logged in the error log, the message may be in response to a backup operation or to a restore operation. In response to a backup operation, this error may be a warning, as when you try to append a backup, or the error may indicate that the application failed. When this message appears in the error log for a restore operation, it is a warning message; the operation succeeded, but, other backup sets on the media may be damaged and unusable.

See the link to Troubleshooting Error 3266 for additional information.

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