I am using debian 7.4  cd.When I set a partition as '/' during manual partition.It is fine.However when I then try to use it as 'physical volume for encryption'...everything works fine it erases and writes random data BUT THEN mount point '/' disappears!.And when I try to proceed with installation,it saysNO root file system is defined.Please correct this from partitioning menuAnd when I try to make '/', I cant modify the partition to be used as '/' because it says-No modification can be made.In use as physical volume for encrypted volume I am following these instructions:http://www.debianuserforums.org/viewtopic.php?f=9&t=460
Cant create encrypted partitions during Debian installation
debian;system installation;encryption