As root, just untar the file to /tmp or other suitable location using the s option, move it to the desired location and (re)set its permissions.
From the Tru64 UNIX manpage for tar:
s [Tru64 UNIX] Tells tar to strip off any leading slashes from pathnames
during extraction. This is useful when restoring a tape that was
created on a system with a different file system structure.
tried with option 's' ,but getting the same error.
in root mount point we are not having enough space.
i gave this command
tar -xvf /dev/tape/tape14c IN_CDRP_46_1-17_CT_SEP2007.dmp.gz s /backup4
If you have not got enough space on the root filesystem, then you have to find
another filesystem with enough space before you can untar the file you want.