Answer: initialize

AnswerCrossword Clue
INITIALIZEErase old data from a disk
INITIALIZEPrepare for use, as a disk
INITIALIZEPrepare for use, as a disk drive
INITIALIZEFormat, as a disk
initializeto set (as a computer program counter) to a starting position, value, or configuration
initializeFormat (a computer disk)
initializeSet to the value or put in the condition appropriate to the start of an operation