MHDD - MHDD is the most popular freeware program for low-level HDD diagnostics.
hdparm - hdparm - get/set ATA/SATA drive parameters under Linux
Pc-Check - Pc-Check will scan for errors in all hardware components on the computer it is being deployed on...
sdparm - The sdparm utility accesses SCSI device parameters.
Seagate File Recovery - Seagate File Recovery is software that can be used to recover files that were deleted from your computer S.S.D.
CrystalMark - CrystalMark is a full included benchmark application that can be utilized for surveying the execution and capacities of a PC.