Am 15.12.2014, 17:28 Uhr, Diego Roversi <[email protected]> wrote:
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.
The partitions are perfectly aligned, otherwise the high reading speed
could not be obtained.
The governor could only be the culprit when for writing it would not step
up or not use both cpu. I will check that again, but imho there must be
some deeply hidden cause.
In your case when you get reading speeds of only 60 MB/s there must be
some other bottleneck and this most probably hides the slowdown of writing
speed.
Any other hints?
I am pretty sure that everybody using BananaPI with fast enough 3.5" disk
is suffering from that!
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