Vps encrypted root partition

[Marco Vittorini Orgeas]

Hello,
I'd like to encrypt sensible data on a VPS linux instance (emails, 
etc...) and I would proceed with a dm-crypt encrypted root tree (apart 
from /boot).
Now the only downside I see is that in case of unexpected reboot I have 
to insert the pass-phrase
to have the system booted.
Any hints/recommendation/warnings about this configuration ?
It's my first try at it.

Thanks

         Marco