The following are I/O function operation code values.
Value
Name
0x00000020
MM_RANDOM_READ
0x00000021
MM_RANDOM_WRITE
0x00000022
MM_RANDOM_WRITE_ONCE
0x00000023
MM_SEQUENTIAL_READ
0x00000024
MM_SEQUENTIAL_WRITE
0x00000025
MM_RESET_END_OF_TAPE
0x00000026
MM_SINGLE_FILE_MARKS
0x00000027
MM_MULTIPLE_FILE_MARKS
0x00000028
MM_SINGLE_SET_MARKS
0x00000029
MM_MULTIPLE_SET_MARKS
0x0000002A
MM_SPACE_DATA_BLOCKS
0x0000002B
MM_LOCATE_DATA_BLOCKS
0x0000002C
MM_PARTITION_SUPPORT
0x0000002D
MM_SEQUENTIAL_SUPPORT