2.5. Private I/O on Cray T3E systems

Private I/O consists of the READ, WRITE, OPEN, CLOSE, REWIND, ENDFILE, BACKSPACE, and INQUIRE statements. A private READ or WRITE statement is executed by the processing element (PE) that encounters it with no communication or coordination with other PEs.

At program start, unit numbers 0, 5, 6, and 100 through 102 are associated with stdin, stdout, and stderr. If stdin or stdout is not associated with a terminal, it is buffered. Results are unpredictable if more than one PE tries to read from units 5 or 100, or tries to write to units 6 or 101.