attributes (originally known as IntelliSafe, before its introduction to the public domain on 12 May 1995, by the computer hardware and software company Compaq),[2] It is used to predict drive failure, supported from almost all Hard Drives and SSds.
Power-on hours is intended to indicate a remaining lifetime prediction for hard drives and solid state drives, generally, "the total expected life-time of a hard disk is 5 years" [3] or 43,800 hours of constant use.
[4][5] Typically, after a disk reaches 5 years or 43,800 of power-on time, it is no longer in perfect condition and therefore is more likely to fail.
Some devices have even reached more than 10 years of power-on time without showing any problems or errors!
[6] Google tested over 100,000 consumer grade serial and parallel ATA hard disks, finding evidence that S.M.A.R.T.