Which characters are allowed and safe for ZFS file system name? Are this characters only ASCII or UTF-8 is supported?'@' is not allowed because it is reserved for snapshots.PS: I play with FreeBSD 8.2, 9-RC1 and CURRENT+
Allowed and safe characters for ZFS filesystem in FreeBSD
freebsd;mount;zfs
Only alphanumeric characters, space*, -, _, . and : are accepted for file systems names (and other datasets) under ZFS. The maximum file system name length is 255 characters.Note that this limitation can easily be workarounded by setting a valid directory name as a mount point. The latter can be an unlimited sequence of any character from any Unicode character set and is including @. Of course, / is still forbidden being the path delimiter and null is excluded as being the string termination character.Note that space is not documented as allowed but is accepted anyway. I wouldn't recommend using it anyway as it would possibly break tools. 