phase0 = idle phase1 = Big files, USB => HDD phase2 = Small files, USB => HDD phase3 = Big files, HDD => USB phase4 = Small files, HDD => USB exp1 - irq => 4, task => 4, no stress exp2 - irq => 4, task => 4, stress exp3 - irq => 4, task => 3, no stress exp4 - irq => 4, task => 3, stress Tasks completed:- exp1 - phase0, phase1 exp2 - exp3 - phase0, phase1 exp4 -