I'm trying to dump files to tape and im just wondering can i dump from /tmp swap partition?

ufsdump 0ubf 126 /dev/rmt/1 swap/tmp/blah.tar

DUMP: Cannot open dump device `swap/tmp/blah.tar': No such file or directory

ufsdump 0ubf 126 /dev/rmt/1 /tmp/NotificationServer_1.bku
DUMP: `/tmp/NotificationServer_1.bku' is not on a locally mounted filesystem
DUMP: The ENTIRE dump is aborted.

Doh ufsdump is for partitions....anyone know how to do files? or directories?

Ok, so cpio seems to be what I need but now with me playing around on my test machine i seemed to have used up the remaining last gig of free harddrive space and i think its some tape temp file someplace i can't find... is there a command to find directories that are taking up a lot of disk space? My partition backup failed and I found a link someplace stating that if it fails it will fill up the drive is this true? if so how do i free that gig back up?

cpio: cannot fseek on tmpfile /var/tmp/cpiospaqNb, errno 28, No space left on device
1 errors

Filesystem Size Used Avail Use% Mounted on
/dev/dsk/c0t0d0s0 4.9G 4.9G 0 100% /
swap 1.1G 48K 1.1G 1% /var/run
swap 1.1G 32K 1.1G 1% /tmp
/dev/dsk/c0t0d0s7 11G 8.5G 2.3G 79% /export/home