One can only catalog Amiga disks properly inserted in drive DF1. One should probably not attempt to pipe output of MenuCat to a disk inserted in DF1. It may cause a lot of disk swapping. MenuCat cannot catalog 5.25" disk nor can it catalog RAM disks or Hard disks. An attempt to catalog the disk receiving the catfile would probably necessitate quite a few disk swaps. One should never swap disks in DF1 while the drive light is lit.