Well I'll be sure not to sign up as a reseller of BackBlaze...seeing they push (and use themselves) consumer grade HDDs. WD "Blue" drives....I swear sometimes it seems like 50% failure rate. I won't use them for our clients anymore. I've had to replace far too many of them. I've yet to have a WD RE4 drive fail..the best of the best of enterprise SATA HDDs. A month ago I replace an RE4...suspecting it of corrupting....it was in the fax server of a big insurance company. But further troubleshooting took away the fault of the HDD...so I replaced it without need. We rarely have to replace WD Black edition drives either...off the top of my head I can't recall the last time I've replaced one of those. We just got in our first deliver of WD "Red" drives....we are ordering a big Synology RS2212rp+ unit for our own office and will be populating it with Reds.