Reminiscing aside, when we report quarterly, yearly, or lifetime drive statistics, those models with less than 60 drives are not included in the calculations or graphs. Observant readers might note the model number of those HGST drives and realize they were the last of the drives produced with Hitachi model numbers.
On the other end of the spectrum, we still have 25 HGST 4TB drives (model: HDS5C4040ALE630), putting in time in Storage Pods. For example, we have: 20 Toshiba 16TB drives (model: MG08ACA16TA) we are putting through our certification process. There were 192 drives (140,059 minus 139,867) that were not included in the list above because we did not have at least 60 drives of a given model. In comparing drive days with the Toshiba drive, the Seagate 6TB and HGST 8TB drives are just as impressive, having no failures in the quarter yet recording 80,626 and 91,000 drive days respectively in Q2 2020. While the Toshiba 4TB drives recorded less than 10,000 drive days, we have not had a drive failure for that model since Q4 2018, or 54,054 drive days. During this quarter, three drive models had 0 (zero) drive failures: the Toshiba 4TB (model: MD04ABA400V), the Seagate 6TB (model: ST6000DX000) and the HGST 8TB (model: HUH728080ALE600). One year ago (Q2 2019), the quarterly AFR was 1.8%. In addition, this is the first time the quarterly AFR has been under 1%. The Q2 AFR number is the lowest AFR for any quarter since we started keeping track in 2013. The Annualized Failure Rate (AFR) for Q2 2020 was 0.81% versus Q1 2020 which was 1.07%. The table below covers what happened in Q2 2020. This leaves us with 139,867 hard drives in our review. For our evaluation we remove from consideration those drive models for which we did not have at least 60 drives (see why below). Quarterly Hard Drive Failure Stats for Q2 2020Īt the end of Q2 2020, Backblaze was using 140,059 hard drives to store customer data. As always, we look forward to your comments. This review looks at the Q2 2020 and lifetime hard drive failure rates of the data drive models currently in operation in our data centers and provides a handful of insights and observations along the way. Of that number, there were 2,271 boot drives and 140,059 data drives. They’re also FAST, if more expensive per storage unit than spinners.As of June 30, 2020, Backblaze had 142,630 spinning hard drives in our cloud storage ecosystem spread across four data centers. Good stuff! As for me, I like SSDs not just because they’re less prone to failure. Thus their conclusion comes with the weight of evidence “…we can reasonably claim that SSDs are more reliable than HDDs, at least when used as boot drives in our environment.” The real news, of course, is that quarterly, annualized and lifetime failure rates for SSDs are significantly lower than for HDDs, based on Backblaze’s own long-running data collection. Models included come from the following vendors: Crucial, Dell, Micron, Seagate and WDC.įor any given drive model in this cohort of SSDs, we like to see at least 100 drives and 10,000 drive-days in a given quarter as a minimum before we begin to consider the calculated AFR to be “reasonable”. Failure rates for such devices show much lower numbers than for HDD (see the tables labeled Backblaze SSD Quarterly Failure Rates in the latest report for more detail).
The end-of-year 2021 SSD report encompassed 2,200 SSDs. Today, all new servers boot from SSDs older servers whose HDD boot drives fail get SSD replacements. The disparity in the number of years for which data is available comes from later adoption of SDDs as boot drives at BackBlaze. They store log and temprorary files they maintain storage holdings based on each day’s storage activities and volume. The afore-linked report explains that boot drives function in multiple roles on the company’s plethora of storage servers. Interesting! How Backblaze Data Confirms SSD Trumps HDD Reliability Whereas there’s a dramatic upward knee in the curve for HDDS between years 4 and 5 (from 1.83% to 3.55%), failures actually dipped for SDDs during that interval (from 1.05% to 0.95%).
#BACKBLAZE HARD DRIVE RELIABILITY 2020 DRIVERS#
8 years for HDDs for boot drivers in their thousands of datacenter based servers. The lead-in graphic shows 4 years’ worth of SSD data vs. As I read it, that Backblaze data confirms SSD trumps HDD reliability. And indeed, the latest 2022 Drive State report from online backup and storage provider Backblaze weighs in on this topic. Thus, it’s compelling to assert that SDDs should be more reliable, and less prone to failure than HDDS. SDDs are made entirely of circuitry: no moving parts. Hard Disk Drives (HDDs) include spinning platters, moving arms with read/write heads, motors to power things, and gears to control action. It’s always made sense on an intuitive basis.
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