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BitRot or Data Rot is when file or object sits un-disturb on the disk or unaccess from day by day or month by month or year by year and when you go to your pen drive, hard disk or take out your DVD and you see that you can't access that data because bit have flipped called as BitRot or DataRot. BitRot detection is a technique used to identify certain “insidious” type of disk errors where data is silently corrupted with no indication from the disk to the storage software layer that an error has occurred. With GlusterFS 3.7, its possible to detect corruption caused due to bitrot and take steps to rectify them. When bitrot detection is enabled on a Gluster volume, files are signed after they have been written. A periodic filesystem scrubber verifies the integrity of signed files are flags (or marks) files which have mismatching signature. Corrupted files are typically denied access to clients unless it's a replicated volume where it's still possible to access the "good" copy and repair the corrupted file.Read less