A preparation process of a particulate rare earth activated alkaline earth metal fluorohalide stimulable phosphor represented by formula is disclosed, wherein precursor particles of the stimulable phosphor, prepared in the liquid phase process are covered with fine particles of at least two kinds of metal oxides and then subjected to calcination. The method includes writing a plurality of repeating pulse-waveforms on a data track of a magnetic-recording disk at a write element of a magnetic-recording head. In some embodiments the link resources are LTE resource blocks.