Difference between TAR and UFSDUMP ?

UFSDUMP can be used either mounted or umounted Filesystem.
UFSDUMP will take complete file system backup which is including Block device and Spl Characters files

TAR can be used only when the FS is mounted status.
TAR Used for single and multiple file backup
TAR will not backup Block device and Special Charecters files.

Regards

Gurudatta N.R