Using the SAV command can be a tricky one for the long time System i Admin. It's more or less like backing up something out of UNIX.

I refer to this URL a good bit: LINK TO The Four Hundred

SAMPLE: SAV DEV('QSYS.LIB/ADMIN.LIB/TFHSAVE.FILE') OBJ(('/tfh*' *INCLUDE))

It's always going to be QSYS.LIB as the IFS lives in the QSYS library.

Here is a sample if you would like to include it in your CL

 
 IFS:        SAV        DEV('/QSYS.LIB/TAP01.DEVD') OBJ(('/*') +
                           ('/QSYS.LIB' *OMIT) ('/QDLS' *OMIT)) +
                           VOL(*MOUNTED) LABEL(*GEN) SEQNBR(*END) +
                           ENDOPT(*UNLOAD) PRECHK(*NO) UPDHST(*YES) +
                           CLEAR(*ALL) DTACPR(*YES)