In this work the potential application of ferromagnetic nanowire arrays of nickel, cobalt and permalloy for perpendicular magnetic storage media with areal denities beyond the predicted superparamagnetic limit (>70 Gbit/in2) is analyzed. Highly ordered alumina pore channel arrays are used as templates for the fabrication of ferromagnetic nanowire arrays with a periodic interpore distance of 65 and 100 nm and nanowire diameters betweem 25 and 55 nm. Due to self-organization, the pore channels are hexagonally arranged in 2D-domains, which extend over more than ten interpore distances. For the first time, nearly 100% metal filling of alumina pore structures has been obtained by a novel pulsed electrodeposition technique. For the cobalt nanowires the magneto-crystalline anisotropy affects very strongly the total anisotropy of the nanowire array. Therefore, cobalt is not a suitable candidate for this type of perpendicular storage media. Whereas, the nickel nanowire exhibits a nearly single-domain behavior and the influence of the magneto-crystalline anisotropy can be neglected. For the nickel samples coercive fields of up to 1200 Oe and a squareness of ~100 % was detected in the direction of the nanowires axis. In detail, the Ni nanowire arrays have been measured by magnetic force microscopy (MFM) and the interactions of the dipolar field inside the magnetic arrays are discussed. Single magnetic wires have been locally switched by a strong MFM tip and a variable external magnetic field. The MFM results show a good agreement with the magnetic hysteresis loops and magnetic simulations.