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https://apple.stackexchange.com/questions/333201/what-is-the-unit-of-power-on-hours-in-smartctl
A fault in your drive reporting firmware; Or that your drive was only active for six hours during that period. Drives will power up and down whenever they can to save energy. Six hours of storage access may not be unrealistic but it all depends on how the computer is used. Try using the -v flag to customise the output. You can specify times in minutes or other units.
https://forums.macrumors.com/threads/apple-ssd-power-on-hours.1172250/
"Power On Hours" is apparently a standard counter that most new SSDs have that basically counts the total number of hours the SSD has been running during its entire lifetime, according to Google....
https://www.mac-forums.com/threads/program-to-see-how-many-hours-a-hard-drive-has-on-it.352752/
It shows over 57000 hours of power on time and 281 power cycle counts but no red bars anywhere and green everywhere macgig Joined Mar 15, 2006 Messages 1,216 Reaction score 24 Points 38 Your Mac's Specs 2015 Retina 4K iMac. Catalina. 8GB RAM. Crucial 500GB external SSD Oct 5, 2019 #8 I put the red bars there krs Joined
https://www.ghacks.net/2008/06/29/how-many-hours-have-your-hard-disks-been-running/
SSD : 14801 hours (616 days) Power On Count: 1810 /; Kingston SH10S3120G-NV 120 GB / Good (95%) 24 *C. HHD1 : 37491 hours (1562 days) Power On Count: 1133 /; WDC WD2500JS-55NCB1 250 GB / Good 46 *C. HHD2 : 29891 hours (1245 days) Power On Count: 3014 /; ST31500341AS 1500 GB / Caution 38 *C. This is my daily used computer.
https://kb.acronis.com/content/9109
Attribute ID: 9 (0x09) Hard drives, supporting this attribute Samsung, Seagate, IBM (Hitachi), Fujitsu, Maxtor, Western Digital Description Power-On Hours (POH) S.M.A.R.T. parameter indicates a count of hours in power-on state. The value of this attribute shows total count of hours (or minutes, or seconds, depending on manufacturer) in power-on state.
https://en.wikipedia.org/wiki/Power-On_Hours
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" or 43,800 hours of constant use. Once a drive has surpassed the 43,800 hour mark, it may no longer be classed as in "perfect condition".
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