went through around 10 or XC 2016 s before finally giving up and taking their offer on the XC 2015 . Current disk speedThe disk speed issue is caused by a BIOS bug on the XC 2016 apparently they use a motherboard custom made for them and therefore their own BIOS which puts the drive in Sata II mode causing disk speed issues . Since the XC 2015 doesnt use the custom board it is free from the issues . Thought just to note , the disk wont be able to sustain a 1 Gbps 125 MBs random write to it since those are its sequential write speeds not its random write speed . Their support has stated the Sata II part in the past , makes no sense to me since Sata II should be more than fast enough 300 MBs to support a single rotating drive especially one as bad as the one in the XC 2016 .