HDDScan is a freeware utility for storage devices diagnostics (HDD, RAID, Flash). The program can scan storage device for Bad-blocks, show S.M.A.R.T. attributes and change some HDD parameters such as AAM, APM, etc.

Capabilities and requirements:
Supported storage devises:
ATA/SATA HDD.
SCSI HDD.
USB HDD (see Appendix A).
FireWire or IEEE 1394 HDD (see Appendix A).
RAID volumes made of ATA/SATA/SCSI HDDs (surface tests only).
USB Flash (surface tests only).
Storage device tests:
Verification in linear mode.
Reading in linear mode.
Erasing in linear mode.
Reading in Butterfly mode (synthetic random read).
S.M.A.R.T.:
Reading and analyzing S.M.A.R.T. parameters from ATA/SATA/USB/FireWire HDD.
Reading and analyzing Log Pages from SCSI HDD.
S.M.A.R.T. tests running on ATA/SATA/USB/FireWire HDD.
Temperature monitor on ATA/SATA/USB/FireWire/SCSI HDD.
Additional features:
Reading and analyzing identity information from ATA/SATA/USB/FireWire/SCSI HDD.
Changing AAM, APM, PM parameters on ATA/SATA/USB/FireWire HDD.
Reporting defect information on SCSI HDD.
Spindle start/stop function on ATA/SATA/USB/FireWire/SCSI HDD.
Reports can be saved in MHT format.
Reports can be printed.
Skins support.
Command line support (NEW).