Recently, bit patterned media (BPM) have been projected as one of the promising media for high density magnetic storage devices. In this work, we have studied the magnetic properties of Co/Ni multilayers-based BPM. Thin films of [Co(0.3 nm)/Ni(0.6 nm)]4, 10, 20 multilayers (MLs) were deposited on the barrier layer of an ordered array of nano-bump of anodic alumina (AAO) template using dc magnetron sputtering. From the measurement of room temperature magnetization hysteresis (M − H) curves, it is observed that [Co(0.3nm/Ni(0.6 nm)] nano bumps with N = 4 and 10 bi-layers exhibit magnetic isotropy behavior but, nanobumps with N = 20 bi-layers is found to display perpendicular magnetic anisotropy with an anisotropy constant (Ku) of 1.90 × 105 erg/cm3. The value of coercivity (HC) and squareness increases up to N = 10 bi-layers and then it further decreases for N = 20 bi-layer. The value of HC is found to be in the range of 100–200 Oe. The post-annealing of the nano-bumps enhances the coercivity but it destroys the perpendicular magnetic anisotropy. The obtained magnetic properties parameters on nano-bumps are compared with the properties of the same multilayers deposited on a flat Si substrate. It is observed that the values of HC for Co/Ni nanobumps was found to be higher in comparison to the films deposited on flat Si substrates, but squareness (MR/MS) and Ku were found to be lower.