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Incremental backup uses sector-by-sector mode

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Hello, I backup daily but I'm having some issues. It appears that after I do a full backup, the daily incremental backups are done in Sector-by-Sector mode. The initial full backup is not in Sector by Sector mode. If I run the CHDDSK /f on the volume the incremental is ok and completed for only the changes on the volume. CHKDSK does not report any "Dirty volume" issues on the drive.

Any suggestions on what the problem may be?

HP DEsktop, I7, 8GB RAM, 2TB drive, WIn 10

Thanks

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If there is some issue with the NTFS volume information, ATI might default to a sector by sector backup because it might determine that the information available doesn't tell which right sector to backup.

The remedy is typically to run chkdsk to repair the NTFS information.

If you do it once or twice in the lifetime of the disk, you are probably OK.

If you have to do it repeatedly, you might have on going corruption of the file system, which could be produced by software, or hardware issues.