Buffalo TeraStation Pro TS-HGL/R5 Raid 5
4 x Seagate (model) Raid 5
Unread sector count on disk 3/4 on the Raid 5. Enough to throw it offline
Short video to show the process of getting a nice clean image of a faulty drive prior to rebuilding. The lower the unread count the more perfect the image. You cannot do this with software.