Video playback test As video is being written to storage, video is simultaneously recalled or reviewed at a rate equal to percent of the write rate. The review did not affect the write rate, video quality, or result in dropped video frames. Disk failure test A single disk failure is the most common failure affecting storage systems today. When a disk fails, that disk is removed and replaced. The replacement disk is then reconstructed. The disk rebuild operation did not affect the write rate, video quality, or result in dropped video. Node reboot test