Backblaze hard drive reliability 2017 download#

The average age of all the other drive models is less than 4 years, with nearly 80% of all of the drives being less than 3 years old. Only the 4 TB HGST drives (model: HDS5C4040ALE630) have an average age over 4 years - 51.3 months to be precise. There are several factors that contribute to this, but one that stands out is the average age of the hard drives in use. The hard drive failure rate for the quarter was 1.84%, our lowest quarterly rate ever.The chart below is for activity that occurred just in Q3 2017. Let’s look at the Q3 statistics that include our first look at the 10 TB and 12 TB hard drives we added in Q3. These numbers are for those hard drives of which we have 45 or more drives - with one exception that we’ll get to in a minute. Since our Q2 2017 report, we added 9,599 new hard drives and retired 6,221 hard drives, for a net add of 3,378 drives and a total of 86,529.

Backblaze hard drive reliability 2017 download#

Along the way, we’ll share our observations and insights, and as always, you can download the hard drive statistics data we use to create these reports. We’ll also check in on our 8 TB enterprise versus consumer hard drive comparison, and look at the storage density changes in our data centers over the past couple of years. In this update, we’ll review the Q3 2017 and lifetime hard drive failure rates for all our drive models in use at the end of Q3. In Q3 2017, Backblaze introduced both 10 TB and 12 TB hard drives into our data centers, we continued to retire 3 TB and 4 TB hard drives to increase storage density, and we added over 59 petabytes of data storage to bring our total storage capacity to 400 petabytes. For the most recent Hard Drive Reliability Statistics, as well as the raw hard drive test data, visit Hard Drive Data and Stats.