Magnetic storage device having a buffer track and storage tracks, and method of operating the same

An information storage device comprising:

• a magnetic structure including a buffer track and a plurality of storage tracks connected to the buffer track, each of the buffer track and the plurality of storage tracks including a plurality of magnetic domains and magnetic domain walls between adjacent magnetic domains;
• a write/read unit disposed on the magnetic structure;
• a plurality of switching devices respectively connected to the buffer track, the plurality of storage tracks, and a first end of the write/read unit;
• and
• a circuit configured to control the plurality of switching devices and further configured to supply current to at least one of the magnetic structure and the write/read unit.