Read about using Solaris Volume Manager software to transfer the data of a file system across to another partition so that the data can be backed up at any time. When backing up in Solaris, the file system must be inactive; otherwise, the output may be inconsistent. A file system is inactive when it is unmounted or it is write locked by OS. Although fssnap utility in Solaris can do online backup, it will fail if the file system could not be write locked.