India A powered to a mammoth total of 582/9 during the second day of the first unofficial Test against South Africa A, who now trail by 562 runs finishing the day at 20/1.
Rohit Sharma and Suresh Raina got their own centuries adding to captain Cheteshwar Pujara's ton on the first day.
For South Africa A, Duminy took three wickets.
Before the close of play, Jaydev Unadkat struck for India, taking the wicket of Reeza Hendricks.
