Pete,
No problem, thank you for the answers - they're all good
On this last point I was thinking of being a bit tricky:
-- say I want to use a 500GB disk for the Acronis SecureZone,
-- partition it into, say, 250GB, 200GB and 50GB partitions,
-- as I understand it the third partition will use the inside tracks od the disk and be a little slower
-- select the third parition when Acronis asks which disk/partition to use for SecureZone.
This would keep the faster areas of the disk (i.e. quicker sample access) available for recordings, samples etc.
[Disclaimer: my disk access theory may be a little out of date.]