Hi, all: I want to use the ram disk as my cryption target disk. This is my command: # dd if=/dev/zero of=dmf count=4096 bs=4096 # sudo dmsetup create dmf 2.6.24-16-generic, Library version: 1.02.20 (2007-06-15) Driver version: 4.12.0 but it will be blocked here. But I don't kown what wrong with it. Do you some idea on it or do you some idea learning dm-crypt? Thanks all! Best Regards! Bai Shuwei -- Love other people, as same as love yourself! Don't think all the time, do it by your hands! Personal URL: http://dslab.lzu.edu.cn:8080/members/baishw/ E-Mail: baishuwei@xxxxxxxxx or baishuwei@xxxxxxxxxxxxxxxx