I have noticed a problem on my dell inspiron 13 series 2-in-1 7359.
The SSD is very slow when it has to copy files. It starts very fast (it does 30%-40% of the job) but after 5-6 second the speed drops at 10MB/s. Which I believe is ridiculous for a SSD.
Also the CPU goes up at 100% when I start copying files.
The problem is not only with Ubuntu 16.04 but also with windows 10.
I have a 256GB SSD (SAMSUNG PM871), and I partitioned it in 3 sections:
- one EXT4 with Ubuntu 16.04
- one NTFS with Windows 10
- one NTFS with no operative system
On Windows I installed a Samsung tester tool and it says my write speed is 300-400MB/s, so everything should be fine but of course it isn't.
I have read several pages that talk about similar problems but I can't figure out a solution.
Some link I visited:
- Ubuntu SSD - Was fast, is now extremely slow
- Ubuntu 16.04 slow performance
My CPU is: Intel® Core™ i7-6500U CPU @ 2.50GHz × 4.