Slow network write speeds

[Chutneybadger]

Can anybody shed any light on this please.

Reading from SSD Shared folder on PC1 and writing to SSD on PC2 gives a read speed of around 108/110 MBps (gigabit network) which is perfect as it's near enough maxing the line.

However writing back to PC1 SSD Share from PC2 only nets between 50MBps and 67MBps write speed.

The SSD on PC1 is capable of write speeds in excess of 400MBps when tested locally.

If the adapters are 1GB it will read from an SSD share at around 110MBps and write back to the same share at around 50-60MBps, if the adapters are 2.5GB it will read at around 250MBps and write back to the same share at 110MBps.

Tested from Windows to Windows, and Linux to Windows.

Thanks in advance!