MiSTer HDF Images with Arculator and RPCEmu

[andriodious]

I am transferring files to HDF images via a hostfs feature in Arculator. When testing a MiSTer HDF in Arculator 2.0 or RPCEmu 0.9.3a both have issues reading the HDF.

I could not get RPCEmu to recognise the HDF -- that could have just been me!
http://www.marutan.net/rpcemu/index.php

Arculator has a recoverable exception on configuration, allows the drive to be used but corrupts the drive image on exit.
http://b-em.bbcmicro.com/arculator/index.html

on pressing [No] button there are no more alterts and the drive is usable for that session (but gets corrupted on exit as above):

I don't know if this issue is related but when the drives are recognised after No/cancel to the alert, sometimes the drive reports random corruption e.g. when creating Spark images to transfer to the host machine. Sometimes the drive images don't report any corruption whilst in use. I have tried this on A3020 and A5000 machine configurations with 4MB RAM.