Hard disk drives – what’s most reliable?

If you are looking at buying a hard disk drive, it’s easy to compare speed of rotation, size of buffer, read & write speeds, but what isn’t usually available is good information on reliability.

Problem solved – Cloud backup provider, Backblaze, has recently published the results of its experience with over a billion hours of aggregate drive usage.


Credit: Backblaze/Ars Technica

http://arstechnica.com/information-technology/2016/05/one-billion-hours-on-and-hgst-still-rules-the-roost-for-hard-disk-reliability/
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“HGST, Inc. (formerly Hitachi Global Storage Technologies) is a wholly owned subsidiary of Western Digital that sells hard disk drives, solid-state drives, & external storage products & services.” – https://en.wikipedia.org/wiki/HGST / one billion hours HGST rules the roost hard disk reliability five-year-old disks still going strong Cloud backup provider Backblaze latest data accumulated reliability hard drives passed more than a billion hours of aggregate drive usage started tracking reliability in April 2013 HGST drives disc drive disk drive most reliable trend continues failure rate remarkably low three years in service 3TB and 4TB units annualized annualised failure rates 2TB units on average more than 5 years old small increase in failure rate extraordinary reliability bad experiences with certain models annualized annualised failure rates approaching 30 percent Seagate's performance Backblaze most common disk type 4TB Seagate unit nearly 35,000 of the drives in use demonstrating a failure rate of 2.90 percent Seagate 4TB units worse failure rates better pricing availability Backblaze typically orders disks 5,000 to 10,000 at a time suppliers of Seagate Western Digital-owned HGST Western Digital Toshiba disks 4TB 6TB 8TB units pricing cost-effective bulk availability uses a mixture of different disks Vaults individual Storage Pods older storage pods holding 45 drives standardizes standardises standardize standardise on a particular type Backblaze buy 1,200 disks deploy disks at scale /