New Backblaze HDD Reliability Report https://www.backblaze.com/blog/hard-drive-failure-rates-q1-2017/ My summary: HGST = Good, except the 8TB versions w/ over 2% failures. WDC EFRX 3T and 6T disks = Bad. Seagate = Mixed bag. Some terrible (4T), some not bad. Toshiba = not good.