This method of backup is done when the i flag is not specified. A file system backup allows incremental backups to be performed easily. An incremental backup will back up all files that have been modified since a specified previous backup. The compress and pack commands enable you to compress files for storage, and the uncompress and unpack commands unpack the files once they have been restored. The process of packing and unpacking files takes time, but once packed the data uses less space on the backup medium.
Several commands create backups and archives.
Can usually read data archived on another platform provided it is in cpio format. Commonly used to convert and copy data to and from non-AIX systems, for example, mainframes. No single backup policy can meet the needs of all users. A policy that works well for a system with one user, for example, could be inadequate for a system that serves five or ten different users. Likewise, a policy developed for a system on which many files are changed daily would be inefficient for a system on which data changes infrequently.