[ale] Really slow copy

[David Tomaschik]

Tim Watts wrote:
> I don't understand where the bottleneck is. Why is it getting so little CPU 
> time? Why has its share dropped so much and never resumed? I don't think 
> there's a lot of local network noise but I don't know how to measure that. I 
> seem to get good responsiveness from the laptop.
>
> Would I be better off killing the current process and starting over with just 
> plain old cp? I've already invested about 18 hours in this thing and don't 
> have much to show.
>
> Open to suggestions.
>
> Thanks.
>   

CPU time probably has very little to do with this.  I've never seen a
CPU-limited straight up copy.  Rsync perhaps, but never a plain old
copy.  My guess is some sort of slowness in the file manager, but even
that may be a stretch.  What were the initial transfer rates like?  How
long were they sustained?  My guess is maybe a drive is slower than you
thought.  Have you tried benchmarking both the source and destination
with hdparm?

David

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