PC hours powered on

I just bought a second hand laptop for a friend. It’s a Lenovo Thinkpad X60S from around 2006/2007. I have one nearly the same and they were built from very solid stuff.

Poking around in the hard drive SMART information I found an interesting thing:

sudo smartctl -a /dev/sda

The Power_On_Hours for the laptop was 4847 (hours). Assuming the laptop is 6 years old and there are about 8700 hours in a year, the laptop has only been switched on for about 10% of its life.

(Or possibly it had a replacement hard drive, but that seems unlikely given the spec of the hard drive matches what I’d expect for the machine).

I ran the same test on my current laptop: Power_On_Hours = 16361 (hours) and the laptop is around 2 years old, and stays on just about 100% of the time, so that number makes sense.



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6 responses to “PC hours powered on

  1. llg

    I don’t see the fuss about it. It’s a normal 6 year laptop usage. It wasn’t overused, nor it was underused. That is, normal people usually sleep during the night.
    On the other hand, unless you’re using your laptop for hosting, you’re just pointlessly wearing it out.

  2. So what is this reading? Does it represent amount of hours left or actual amount used?

  3. Ron

    From wikipedia page you linked

    Count of hours in power-on state. The raw value of this attribute shows total count of hours (or minutes, or seconds, depending on manufacturer) in power-on state.[18]

    On some pre-2005 drives, this raw value may advance erratically and/or “wrap around” (reset to zero periodically).[19]

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