Although it’s unusual even in cheap cables, it’s possible 1 or more pairs (most likely pins 4,5,7, or 8) were bad.
Autodetection can detect this and will fall back to 100 meg (which only needs pins 1,2,3 and 6.)
Slower WRITES aren’t unusual if you have the media server(s) enabled. ~30 MB/sec is not unsual in that case; in fact, that’s pretty close to what I see when writing with Twonky enabled.
As soon as the MBL detects that a file has been opened for writing, it launches the media indexer and media crawler, as well as Twonky Server processes, which will slow it down.
My recommendation, if you’re going to be doing a lot of writing, is disable those servers and then re-enable them when you’re done.
