i am looking for a disk benchmark for my ssd and i found a free software called crystal disk mark. I feel insecure downloading software from foreign country because it can contain viruses. I know that crystal disk mark is from Japan.
http://crystalmark.info/software/CrystalDiskMark/index-e.html
http://crystalmark.info/software/CrystalDiskMark/index-e.html