SSD vs HDD run time

[Komplett]

So I have a Samsung 960 Evo 250GB NVME, and a Seagate 1TB 7200rpm. When I check CrystalDiskInfo my SSD which is the OS drive has 645 hours of run time, while the HDD which is video and game storage has 1456 hours of run time, I bought them and installed them at the same time so how can i be such a different number?

[userzero]

Are they new? Do new drives usually have any run time on them?!

[Komplett]

3 minutes ago, userzero said:

Are they new? Do new drives usually have any run time on them?!

Not new new, but the PC was built with all new parts in september 2017. In my head they should have the same run time since they were installed at the same time, not an 800 hour difference, but Im not sure how it works..

[userzero]

If they test up fine don't even worry.

[Cerus]

12 hours ago, Komplett said:

Not new new, but the PC was built with all new parts in september 2017. In my head they should have the same run time since they were installed at the same time, not an 800 hour difference, but Im not sure how it works..

 

You have your answer then. You say the drives were not new when installed. The run times are independent of when they were installed in a system. It wouldn’t be a useful indicator of drive health and age if it reset every time you rebuilt a system would it?

 

 

[Komplett]

5 hours ago, Cerus said:

 

You have your answer then. You say the drives were not new when installed. The run times are independent of when they were installed in a system. It wouldn’t be a useful indicator of drive health and age if it reset every time you rebuilt a system would it?

 

 

Read what I wrote again, he asked if they were new, but they arent fresh new anymore, but was when I built the system in september 2017.

[Cerus]

2 hours ago, Komplett said:

Read what I wrote again, he asked if they were new, but they arent fresh new anymore, but was when I built the system in september 2017.

You’re answer is still in your original comments. One drive is your OS the other has videos and games. 

 

 

[Komplett]

2 hours ago, Cerus said:

You’re answer is still in your original comments. One drive is your OS the other has videos and games. 

 

 

So youre saying an OS drive has less run time than a storage drive cause just that?

You are the most unclear person I've ever seen.

[gcubed]

Ok, a couple of things.

 

First a question: By "run time" do you mean Power-On Hours?

 

The SMART specification refers only to a messages passed between disk drive sensors and the computer . Basically to the motherboard it is a set of binary status indicators (Threshold Exceeded/Threshold Not Exceeded). What is actually in the SMART Attributes is vendor specific (and sometimes model specific). So comparing a Samsung SMART Power-On Hours Attribute to a Seagate SMART Power-On Hours Attribute is an apples to oranges comparison.

[Komplett]

1 hour ago, gcubed said:

Ok, a couple of things.

 

First a question: By "run time" do you mean Power-On Hours?

 

The SMART specification refers only to a messages passed between disk drive sensors and the computer . Basically to the motherboard it is a set of binary status indicators (Threshold Exceeded/Threshold Not Exceeded). What is actually in the SMART Attributes is vendor specific (and sometimes model specific). So comparing a Samsung SMART Power-On Hours Attribute to a Seagate SMART Power-On Hours Attribute is an apples to oranges comparison.

Run time as in run time and not on hours. 

So because of the different makes they might report differently?

[Cerus]

4 hours ago, Komplett said:

So youre saying an OS drive has less run time than a storage drive cause just that?

You are the most unclear person I've ever seen.

 

 

Sorry, I figured it would be self explanatory. My understanding of the hours statistic is that it’s when the drive is in use. Running a game from a second hard drive should cause more hours to rack up on that drive and few if any on the OS drive. Yeah your OS is loaded but it’s  not doing much. The game is running off the second drive so it is the most active drive. 

 

A drive that’s powered on but not active shouldn’t accumulate any hours. 

[gcubed]

23 hours ago, Komplett said:

Run time as in run time and not on hours. 

So because of the different makes they might report differently?

Look, there is no SMART attribute known as "run time". The closest to that I have seen is the Power-On Hours attribute. So whatever "run time" is, it is a function of the software that is reporting it and not of SMART. It may be Power-On Hours, it may be something different.

 

SMART is primarily a messaging protocol. Basically, data related to drive status is stored and when a certain threshold is reached, the drive signals a potential problem. As an example: With the Power-On Hours attribute, one drive manufacturer may be storing the amount of time that power is supplied to the drive, another manufacturer may be storing the amount of time that the drive is not in a sleep state and a third manufacturer may be storing the time that read/write operations are in progress. Each of these manufactures may also have assigned a threshold for Power-On Hours. That is to say, the manufacturer has determined a life expectancy for the attribute. One manufacture knows that after 15,000 hours (as they measure it) their drives may start failing. Another may set the threshold at 10,000 hours and another at 7,500 hours. What is important here is not what the Power-On Hours is, or even what the threshold is, but whether or not your drive has exceeded or is close to exceeding threshold. This is one reason why comparing "run time" between two different manufacturers is an apples to oranges comparison.

 

Another thing you have to consider is that you are dealing with two different technologies. With a HDD, when the drive is spinning there is wear on the drive. Even more wear occurs during read/write operations. With a SSD, almost all of the wear occurs on write operations. As such, the Power-On Hours attribute will most likely be measured differently and the threshold will be different. This is another reason why comparing "run time" is an apples to oranges comparison.

 

Finally, you are using both of your drives for entirely different purposes. Even with two identical drives, it is likely that the "run time" will be different simply because your work drive is being used more than your system drive. Again, an apples to oranges comparison.