fastest SD write Fat lib ?

there have been a few iterations of the SD libs & i was wondering if anyone has done write benchmarks on the Due ?--

forgive me if this has been asked / been away getting my FPGA peripheral up & running.. nearly there - need a sustain write to SD card greater than 4megbytes/sec (preferably 10MB/s ... ) with no latency greater than 1 sec (can handle 3sec ...)

i was wondering if anyone has done write benchmarks on the Due ?

Yes. I write a port of FatFs for Arduino (mainly for Due) and I make some benchmark. SdFat is faster, mainly if you can set SD_SPI_CONFIGURATION to 0 , in case there is no other devices attached to SPI bus. Have a look at that topic: Functions to wrap FatFs on Arduino

Very timely
thank you