CrystalDiskInfo is a free HDD health monitoring software for Windows. It displays fundamental HDD information, monitors S. M. A. R. T. values, and disk heat. Crystal Disk Info is full offline setup installer for PC, check away now! An HDD/SSD utility free software that supports a part of USB connection and Intel RAID. Features and Highlights Helps a part of external USB disks Monitoring health status and temperature Alarm Mail Graph of S. M. A. R. T. information Control AAM/APM settings Controller Information General Information S. Meters. A. R. T. Information Result of DETERMINE DEVICE command Result of SMART GO THROUGH DATA command Result of SMART GO THROUGH THRESHOLD command FAQ Unknown “Buffer Size” The field of buffer size supports a maximum of 32 MB and this filed is obsolete. Unknown “Rotation Rate” The filed of rotation rate will be defined by ATA8-ACS. So , almost disks do not report rotation rate. No disks CrystalDiskInfo supports only IDE (Parallel ATA) and Serial ATA disks connected internal ATA controller (Chipset included). Amazingly Disk Info supports a part of USB-HDD. CrystalDiskInfo does not support RAID disks and IDE (Parallel ATA) and Serial ATA disks connected external ATA controller. Also Available: Download CrystalDiskInfo Portable Download CrystalDiskInfo Latest Version