In a brief teshuva, Rav Moshe Feinstein tackles two unrelated issues. The first is the question of what bracha to make on chocolate covered raisins, insofar as both components are independently desirable and delicious. As such, Rav Moshe rules that one should make both a שהכל and a בורא פרי העץ. Since it is generally not possible to eat the raisin part independent of the chocolate, a person should have in mind not to include the raisin when he makes the bracha on the chocolate, or should make a בורא פרי העץ on some other fruit first.
The second issue dealt with is whether there is a problem of erasing Hashem's name when one erases a tape recoding that mentions the name. Since the name of Hashem is not actually written on the tape, there is no actual prohibition, but Rav Moshe cautions that others may think that we are taking a cavalier attitude towards God's name. However, if one can erase it in a more indirect manner [perhaps by taping over it?] then that would be preferable.