The air inside adds an appreciable amount of drag on the platters that in turn requires an appreciable amount of additional energy to spin the platters. Inside of an air-filled hard drive there are rapidly spinning disk platters that rotate at a given speed, 7200 rpm for example. Fast forward a little over 4 years later and 12 TB helium-filled drives are readily available, 14 TB drives can be found, and 16 TB helium-filled drives are arriving soon.īackblaze has been purchasing and deploying helium-filled hard drives over the past year and has started looking at their failure rates compared to traditional air-filled drives. The 6 TB drive was not only unique in being helium-filled, it was for the moment, the highest capacity hard drive available. In November 2013, the first commercially available helium-filled hard drive was introduced by HGST, a Western Digital subsidiary. Helium makes a difference in drive failure rates? The overall failure rate of 1.84% is the lowest Backblaze has ever achieved, besting the previous low of 2.00% from the end of 2017. Many of these drives were deployed in the last year, so there is some volatility in the data, but you can use the Confidence Interval to get a sense of the failure percentage range. The failure rates of all of the larger drives (8-, 10- and 12 TB) are very good, 1.2% AFR (Annualized Failure Rate) or less. For each model, Backblaze computes their reliability starting from when they were first installed. If a drive model has a failure rate of 0%, it only means there were no drive failures of that model during Q1 2018.Īs you can see, the overall Annualized Failure Rate (AFR) for Q1 was just 1.2%, well below the Q4 2017 AFR of 1.65%.īelow is the lifetime failure rate chart for all the hard drive models which have 45 or more drives in operation as of March 31st, 2018. This leaves the report with 98,046 hard drives. Backblaze's review looks at the quarterly and lifetime statistics for the data drive models in operation in the company's data centers.įor the evaluation below the company removed from consideration those drives which were used for testing purposes and those drive models for which the company did not have at least 45 drives. Of that number, there were 1,922 boot drives and 98,188 data drives. Backblaze has released its latest hard drive reliability report, based on the company's enormous storage pool, and the results this quarter seems to be better than previously.Īs of March 31, 2018, Backblaze had 100,110 spinning hard drives.
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