On Sat, 13 Dec 2014 12:29:10 +0100
Irgendeiner <[email protected]> wrote:

> Hooked to a BananaPI board, reading speeds are above 100 MB/s and follow  
> the speeds limited by the disk drive. However, writing is about 4 times  
> slower and I could not yet find an authorative answer explaining it.

It can be a problem of partition not aligned to 4096 byte block? 

https://wiki.archlinux.org/index.php/Advanced_Format

On my hardware (olinuxino-a20-micro) writing is slighty slower, 45Mb/s vs 
60Mb/s.

Check also if you are using a frequency governor different from performance.

-- 
Diego Roversi <[email protected]>

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