Failure rates and MTBFs calculated on 2400 hours usage annually
“AFR and MTBF specifications are based on the following assumptions for desktop personal computer environments: .. 2400 power-on-hours per year” , so reads this screenshot is from the Seagate Barracuda 7200.11 product manual. So while this does not mean your disk drives in computers that run 24×7 need to be turned off on April 10th or you void the warranty and/or the disk crashes, it is something to consider when deciding if that $100 consumer-class disk drive is really such a good deal after all. (P.S. Not to leave Western Digital out of the discussion .. their consumer (desktop) class drives do NOT post annual usage rates for consumer disks. They do, however, make it a point to write that their RAID and enterprise class disks are designed for 24×7 operation. Draw your own conclusions).
I’ll shortly post something about consumer-class, nearline and enterprise class disks. (So much for my stint as a honorary member of Seagate’s marketing department).