I'm trying to simulate a FTL(Flash Translation Layer) algorithm and evaluate its performance. What I need is a trace file of a flash access(containing information about block and page access). I'm trying to capture the flash access pattern from an embedded board that has a 4GB eMMC flash on it. A friend suggested me to use blktrace tool. but there is no /dev/sda file on this system.how should I use blktrace to capture flash access on this system?