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Newbie
Posts: 2
Registered: ‎05-09-2017

Drop in read performance during benchmark

[ Edited ]

Hi everyone,

 

Could anyone point me to the direction, explaining the sudden drop in read performance during standard Ubuntu Disk benchmark after a certain time?

 

Is it the USB drive fault? Why the write performance doesn't suffer then? Is it the system? What part exactly? Is it the benchmark itself? What is the correct one then?

 

 

Screenshot from 2017-05-09 19-40-05.png

 

 

Screenshot from 2017-05-09 20-18-22.png

 

Thanks!

 

EDIT: Forgot the details, that is SanDisk Extreme Go 64GB, Lenovo T450s and Ubuntu 17.04

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Newbie
Posts: 2
Registered: ‎05-09-2017

Re: Drop in read performance during benchmark

Here is the result from another Lenovo laptop running Windows, using HD Tach 2.55 with 1Mb samples:

SanDisk-1Mb.png

 

So apparently, the key to this behaviour in the USB Flash Drive itself, although the chart looks different, but similar way too much.

 

The main question now is whether it's a defect, or can anything be done to fix it?