Backup & Restore
There are 3 types of backup commands
ufsdump -- used to back up a full file system.
tar -- does not backup zero size files and devices files, overwrites the dir when the absolute path us used so always use relative path
if you want a slice called /oracle to be backed up
# cd /oracle
# pwd -- should return the present working directory /oracle
# tar -cvf /dev/rmt/0 .