Update:
OK so the WHS console and the Windows drive manager now report the same amount of free space - it took over 4 hours for that to happen and the numbers this morning in drive manager haven't changed since 11:30pm last night so I'm now comfortable that the free space reporting disparity is sorted.
According to the console, load balancing is still going on and file transfer speed from the storage pool is still a miserable 1.5MB/s whilst the same file between the mirror and any other PC on the network is hitting 60MB/s, so clearly there's a problem with serving from the WHS storage pool.
I can now only assume that it's a disk fragmentation issue, perhaps aggravated by turning off folder duplication, but that now poses the question - what is load balancing all about if it doesn't include some kind of de-frag process?
Once I'm able to copy my all my data across to the mirror (probably about 6 months at currently available speed

), I'll apply PP1 and attempt to manually de-frag the storage pool, once done I'll report back with what I find.
Have to say that all this has disappointed me, I think I read somewhere some time ago that WHS was not an optimal product for media streaming, if that's correct, I'm starting to see why.
Mike
