SeaTools is Seagate's own hard drive diagnostic tool, that will quickly check the condition of USB, 1394, ATA (PATA/IDE), SATA and SCSI drives.
Tests available include a S.M.A.R.T. check, the option to call the drive's own internal self-tests, a quick scan of key drive areas, or a full check of every drive sector (with the option to repair any that are faulty).
The program works best with Seagate and Maxtor drives. Seagate say it also works with other drive types, but we found these weren't always detected.
Still, it could be a useful diagnostic tool to have around. SeaTools isn't supported on Windows 7, unfortunately, but there is a bootable alternative you can use, and this can also be used to check PCs with no operating system at all.
http://www.seagate.com/www/en-us/support/downloads/seatools/