Endurance Test of Samsung 850 Pro Comes To an End after 9100TB of writes

#5446776 Posted on: 06/27/2017 03:51 AM

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"A normal office system writes between 10 and 35 GB per day. ""

What is a normal office, that somehow writes that much data per day?

Do not underestimate the web cache of the everday procrastinator who has access to business class internet speeds.

#5446798 Posted on: 06/27/2017 06:23 AM

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Pretty sure hat you can remember back to when a consumer would have had a hard time wraping their head around a terabyte. Now a peta byte is-a-coming, to be an everyday phrase to toss around. Glad you found the article.
Its always interesting to get hard data from what is still a relatively new technology. I can add this to another -online- test that showed additional impressive life reserves. More than stated, by a significant margin.

Possibly you can help me get my head around what "bytes" written means. I understand the concept. But if I install a game, lets say a terabyte in size, how many "bytes" were written? Better question, using the knowledge that you have about how games are made: textures vs engine vs executables, of the 1Tb game, how many "bytes" would you feel would be written on the loading and playing of said game for an hour?

Info to better get my head around what affects the longevity of an ssd even though its a much more comfortable place since all of the longevity data has come out.

Any time data is written to, moved around, temporarily cached on an SSD, it counts towards "total bytes written" TBW of the SSD.

NAND flash cells can only be written a finite(but obviously overly pessimistic based on the demonstrated endurance) number of times.

You also have to take into account write amplification, which has to do with how data is written. You could actually end up writing a lot more data to the drive than the file size indicates. Keep in mind that an OS will usually be doing small amounts of reads and writes in the background at all times, and playing a game does a bunch of reads and possibly writes depending on the game and what it decides to page to the SSD.

Heres a good place to start

https://en.m.wikipedia.org/wiki/Write-amplification

http://www.seagate.com/tech-insights/ssd-over-provisioning-benefits-master-ti/

http://www.thessdreview.com/ssd-guides/beginners-guide/

I have a Crucial SSD that supports their Momentum Cache, which essentially lets me use 4GB of my system RAM as a cache to prevent a lot of unnecessary random writes, and i also enabled 10% overprovisioning beyond the SSDs 12GB standard setting since i have a 1TB drive and can use the OP to increase theoretical endurance.

#5446806 Posted on: 06/27/2017 07:06 AM

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"A normal office system writes between 10 and 35 GB per day. ""

What is a normal office, that somehow writes that much data per day?

take a look on task manager -> performance -> drive activity
there many things writing in background
windows/apps/program, browser, stream (youtube/netflix) cache
do u think a drive only writing when u saving some data/files to it ?

#5446838 Posted on: 06/27/2017 09:37 AM

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Sammy 950 PRO. Looking good?

#5446842 Posted on: 06/27/2017 10:02 AM

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I just paid 296 Euro for an 8TB HDD...
Choosing 4x 2TB Samsung 850 EVO's (as cheap as possible without sacrificing too much on quality), that would cost from the same seller: 2636 Euro

I don't see them covering the NINE times price difference in the next 3-5 years. HDD's of similar capacity will drop in price as well during that time.

There are other technologies in development as well, although they are likely the potential successors to NAND. In the meantime, mechanical HDD's still have potential in much larger sizes using HAMR (Heat Assisted Magnetic Recording) for example.