Late last year, BlackBlaze, a online backup hosting provider published a comprehensive study on hard drive failure rates based on the 25,000 units it has in service. While no manufacturer names were published, the study stated that failure rates were highest in the first 18 months of service or as well as after the first three years.
Today the company released the second part of its report and has officially gone on record and listed out which brands are associated with the study. Unfortunately, Seagate appears to be the worst with an annual failure rate of about 14-percent on its 1.5TB model while its 3TB and 4TB models are likely to see 10-percent and 4-percent fail within the first 12 months.
Western Digital's 1TB and 3TB models fare better in the survey with annual failure rates between two and three percent respectively. Surprisingly Hitachi branded hard drives are the most reliable with the 2TB, 3TB and 4TB models all experiencing less than a 2-percent annual failure rate. The study even goes as far as to note that Seagate's Barracuda LP 2TB and Western Digital's Green 3TB both begin accumulating errors as soon as they are spun up for the first time.