Initialize - HP 1652B Programming Reference Manual

command
The INITialize command formats the disk.
Once executed, the initialize command formats the specitied disk,
Note d
permanently erasing all existing information from the disk. After that,
there is no way to retrieve the original information.
Command Syntax:
OUTPUT XXX;":MMEMORY:INITIALIZE"
Example:
HP 18828/1883B
7-8 Programming Reference