Thanks Martin for the reply. So, should I worry and should I consider for drive replacement?This value is reported via ATA Drive Statistics standard, which is a different interface than usual SMART. AFAIK only very few other tools support this standard and CrystalDiskInfo is not among them. So that's why you don't see it reported anywhere else. Drive Statistics is a fully standardized feature and should report correct information, unlike SMART which is only partially standardized (attribute values have never been fully standardized).