If your using the backblaze data for your source, it's totally irrelevant. The bonehead who put consumer drives in a server application you would think should be fired. My guess is they got them so cheap, it's more cost effective to use 5 consumer drives than buy one enterprise drive.
Consumer drives have a feature called head parking which moves the heads away from the spinning platter to protect them from vibration and an accidental desk bump. Each drive is rated for a certain number of parking cycles ..... server drives are not subject to desk bumps and are vibration isolated if designed correctly so the "consumer protection feature" actually decreases reliability in a server as they many see 50,000 cycles in a month.
So lets look at some "real data" indicating drives returned 6 - 12 months into the warranty period.
http://www.hardware.fr/articles/927-6/disques-durs.html
- Seagate 0,69% (contre 0,86%)
- Western 0,93 (contre 1,13%)
- HGST 1,01% (contre 1,08%)
- Toshiba 1,29% (contre 1,02%)
Top 5 failure rates
- 4,76% WD Black WD4001FAEX
- 4,24% WD Black WD3001FAEX
- 3,83% WD SE WD3000F9YZ
- 2,56% HGST Travelstar 7K1000
- 2,39% Toshiba DT01ACA300
and for the next reporting period
http://www.hardware.fr/articles/934-6/disques-durs.html
- Seagate 0,68% (contre 0,69%)
- Western 1,09% (contre 0,93%)
- HGST 1,16% (contre 1,01%)
- Toshiba 1,34% (contre 1,29%)
Top 5 failure rates
- 4,58% WD Red WD60EFRX
- 3,40% Toshiba 3 To DT01ACA300
- 2,93% WD Green 4 To WD40EZRX
- 2,78% WD SE 3 To WD3000F9YZ
- 2,14% Hitachi Ultrastar A7K2000 1 To
For enterprise drives
- 0,00% Seagate Enterprise Value ST2000NC001
- 0,00% Seagate Enterprise Capacity ST2000NM0033
- 0,00% Seagate Enterprise Value ST3000NC002
- 0,00% Seagate Constellation ES ST4000NM0033