If you ran it from Windows I believe it only checks the SMART data which can also be done at all times from desktop using a program like CrystalDiskInfo.
It can't scan sectors because it's running.
The DOS CD scan can check sector by sector and even do some repairs.
The surest way to test a HD is using the manufacturer's extended CD scan along with Disk Check.
How is your Windows 7 performance on that SSD?
I always wipe the old OS HD's to prevent boot sector code from sometimes interfering, even at POST. Clean - Diskpart Command.
If this is the old OS HD you can zero it using SeaTools CD.