SSD u 100 128GB problem , can not read the"power on hours count "correctly .

hi , guys

i really need your professional help , i just bougt a laptop , it is samsung notebook but with sandisk u100 128G ssd inside .
I tired the software HDtune and Sandisk ssd  toolkit  both , they all read the "power on hours count "  value as 125 , which means this laptop already run for 125 hours afer i used 1 week , right ?

but the thing is that i cant find this value changed anymore even i used for several hours afeter i checked in Hdtune . 

like last night , the value was 125 around 9Pm ,then i went to bed around 12PM , and recheck it agian but it was still 125 .  then i closed the cover and reopned it this morning , it is still 125 … … I set my laptop mode as "alwasy sleep ", so whenever i pressed the power button or just close the cover directly , it always keep in sleeping mode ,which means it  is always in power on mode.

this is my first time to use notebook with ssd , i checked my pc hard disk and the value changed correctly with time passed . so i really wonder how to get the correct the power on hour coun t from sandisk u 100 samrt attribute . cos I need this information to know if my laptop is a used or new .

wish you reply me …thanks a lot ~

you ahve an OEM SSD. I am not sure if it is supported by the retail tools. 

that said sleep is not a power on for the drive. If the computer is in sleep it cuts power to the drive so it would not be counted in the power on hours. 

See Sandisk SATA SSD Plus 240GB Smart values - #5 by ProtopiaUK

I have the same problem with my new Sandisk Plus 240GB SSD - after 3 weeks of almost continuous power on, it was showing 22 hours power-on time.

Assuming that your drive accumulates power-on-hours at the same rate mine did, it sounds like your SSD wasn’t new when you bought it and at a guess might have been previously used for c. 4 months.