当试图卸除encryption分区我得到醇' Error: device-mapper: remove ioctl failed: Device or resource busy 。 来自interwebz的推荐解决scheme似乎是将某些truecrypt设置更改为不使用内核encryption服务。
如果不是因为系统没有安装窗口pipe理器，这很容易尝试。
有没有办法从terminal上更改truecrypt设置“不要使用内核encryption服务”？
根据truecrypt -h ：
-m, --mount-options=OPTION1[,OPTION2,OPTION3,...] Specifies comma-separated mount options for a TrueCrypt volume: headerbak: Use backup headers when mounting a volume. nokernelcrypto: Do not use kernel cryptographic services. readonly|ro: Mount volume as read-only. system: Mount partition using system encryption. timestamp|ts: Do not restore host-file modification timestamp when a volume is dismounted (note that the operating system under certain circumstances does not alter host-file timestamps, which may be mistakenly interpreted to mean that this option does not work). See also option --fs-options.
所以，试试这个：
truecrypt -t -m=nokernelcrypto volume mountpoint