MHDD - MHDD is the most popular freeware program for low-level HDD diagnostics.
Data Rescue - When Apple's system recovery fails, recover any and all files with Data Rescue 3. This data rescue software will even work if your Mac's hard drive fails to mount.
CrystalDiskInfo - CrystalDiskInfo. A HDD/SSD utility software which supports a part of USB connection and Intel RAID. >> Download. Intel RAID (IRST). IRST 11.
321Soft Data Recovery for Mac - The ultimate Mac Data Recovery software with RAID supported.
HDD Regenerator - HDD Regenerator is a unique program for regeneration of physically damaged hard disk drives.
DriveDx - DriveDx is advanced drive health diagnostic and monitoring utility.