A disk drive includes a disk and a head stack assembly for reading and writing to the disk. A profile as used herein broadly refers to a file containing various parameters of a computing system, such as kernel parameters, usable to configure the computing system. Also provided is a composition of microfloral propagules for supporting the soil crust formation, which composition is in the form of suspension or powder. Circuitry is configured to apply an electrical signal to the word line in order to generate current that programs phase change material of the MC load elements into one of a high or low resistive state according to state of the current path of the MCs for non-volatile backup purposes.