The 3033 was a large IBM mainframe, not DASD. See:
http://www-03.ibm.com/ibm/history/exhibits/3033/3033_intro.html
Also, 3031 mainframes used semiconductor memory, not "core" memory.
System/360 used core memories in the 1960s. By the 1970s, when the
System/370 family was introduced, solid-state memory replaced core
memory. See:
http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3145.html
Note that this memory likely would have been housed in a cabinet with
dimensions similar to what was described. Just not core memory. (Sorry,
no more donuts.)
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