Hi,

Why not try to do the p570 mksysb on a filesystem and then transfer it
down to the p520 tape drive ?

For instance:
1- make sure you have a large enough FS to hold the p570 mksysb on the
p520,
2- NFS-export it RW for the p570
3- NFS-mount it on the p570
4- do your p570 mksysb on that NFS share (might eat some network
bandwith)
5- on the p520 side, dump (dd) the mksysb file to the tape

Hubert.