AIUI, Truecrypt is actually very clever about this. Until decrypted, every TrueCrypt partition consists of nothing more than random data. This, combined with th

AIUI, Truecrypt is actually very clever about this. Until decrypted, every TrueCrypt partition consists of nothing more than random data. This, combined with the fact that hidden volumes are actually stored within your first / outer partition it should make it impossible to analyze whether other volumes / partitions exist. See here for more information: http://www.truecrypt.org/docs/?s=hidden-volume http://www.truecrypt.org/docs/?s=hidden-volume