
It was as easy to buy Kindle stuff in europe as it was to get the dead trees shipped....
I've never heard of any HPC computer using disk encryption. Though compute intensive work need not be I/O intensive, it might very well be. If there is a real need to keep your data secure in your HPC environment, other measures that encryption are just as effective.
Frankly, encrypting everything is just not the best solution. Especially since encryption doesn't prevent legitimate users of making copies on non-encrypted media and loosing those. I guess your IT staff just found a cool new toy, but well, I don't see any traces of procedures to help safeguard the data.
My word of advice: get a security-officer to define proper procedures for data classification and data handling, really, all you need is procedure and well then maybe, pgp whole disk will play part in implementing a proper data handling procedure for data classified as C=extremely high.
Perfection is acheived only on the point of collapse. - C. N. Parkinson