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Question Samsung 840 write-speed is only 100mb/s ?

May 3, 2021
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I bought my Samsung 840 SSD on eBay and for some reason, it is writing much slower than I thought it should. The read-speeds are at 400-500mb/s but the write-speed is lower than I thought. CrystalDiskInfo says the drive health is at 89% so does anybody have any ideas on why it's running slower ?
 

USAFRet

Titan
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Mar 16, 2013
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I bought my Samsung 840 SSD on eBay and for some reason, it is writing much slower than I thought it should. The read-speeds are at 400-500mb/s but the write-speed is lower than I thought. CrystalDiskInfo says the drive health is at 89% so does anybody have any ideas on why it's running slower ?
What firmware version?
The current for that drive is EXT0DB6Q.

One of my 840 EVOs:

Samsung Magician


CrystalDiskMark
 
May 3, 2021
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Write cache enabled?
It is On by default, but check.

An 840 EVO is ~7 years old. I have 2x at 250GB.
Hopefully, you didn't pay more than about $10 for this.
Yes write cache is enabled in device manager. Well I paid 20 dollars on eBay and it still works. Don't feel like I got scammed as I mainly bought it for the bootup times.
 

USAFRet

Titan
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Mar 16, 2013
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I did not realize there were 3 levels of the 840.

840
840 EVO
840 PRO

If you have an actual 840, seems like what you see is about as good as it will get.


Later Samsungs only had 2 levels, EVO and PRO.
 

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