Backblaze released first drive stats report12/10/2023 The overall failure rate of 1.84% is the lowest we have 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, we compute their reliability starting from when they were first installed. Below 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. While the quarterly chart presented earlier gets a lot of interest, the real test of any drive model is over time. Lifetime Hard Drive Reliability Statistics We hope to have a better look at the Toshiba 8 TB drives in our Q2 report - stay tuned. Next up is the “pod test” where we fill a Storage Pod with Toshiba drives and integrate it into a Backblaze Vault comprised of like-sized drives. So far the Toshiba drive is performing fine, but they have been in place for only 20 days. Then we monitored the performance of the vault and its member tomes to see if, in this case, the Toshiba drives performed as expected. ![]() In this test, we created a Backblaze Vault of 8 TB drives, with 59 of the tomes being Seagate 8 TB drives and 1 tome being the Toshiba drives. A tome is the same drive model in the same logical position in each of the 20 Storage Pods that make up a Backblaze Vault. Why do we have only 20 drives? When we test out a new drive model we start with the “tome test” and it takes 20 drives to fill one tome. What gives? We only had 20 of the Toshiba 8 TB drives in operation in Q1, so they were excluded from the chart. We mentioned Toshiba 8 TB drives in the first paragraph, but they don’t show up in the Q1 Stats chart. We use 45 drives of the same model as the minimum number when we report quarterly, yearly, and lifetime drive statistics. There were 142 drives (98,188 minus 98,046) that were not included in the list above because we did not have at least 45 of a given drive model. Remember that quarterly failure rates can be volatile, especially for models that have a small number of drives and/or a small number of Drive Days. The overall Annualized Failure Rate (AFR) for Q1 is just 1.2%, well below the Q4 2017 AFR of 1.65%. If a drive model has a failure rate of 0%, it only means there were no drive failures of that model during Q1 2018. For our evaluation below we remove from consideration those drives which were used for testing purposes and those drive models for which we did not have at least 45 drives. Hard Drive Reliability Statistics for Q1 2018Īt the end of Q1 2018 Backblaze was monitoring 98,188 hard drives used to store data. Currently there are about 97 million entries totaling 26 GB of data. ![]() ![]() Each entry consists of the date, manufacturer, model, serial number, status (operational or failed), and all of the SMART attributes reported by that drive. Since April 2013, Backblaze has recorded and saved daily hard drive statistics from the drives in our data centers. ![]() We’ll also take a look at why we are collecting and reporting 10 new SMART attributes and take a sneak peek at some 8 TB Toshiba drives. This review looks at the quarterly and lifetime statistics for the data drive models in operation in their data centers. Of that number, there were 1,922 boot drives and 98,188 data drives. It is always fun to check this list out, as of March 31, 2018 they had 100,110 spinning hard drives.
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