I used Samsung's Firmware Liveupdate to update the firmware of my SW232B to version R301 from the initial version R300. Before updating, the drive was running fine in DMA mode (I use Windows 2000). After the update, even though "DMA if Available" is still selected for the drive, it will only run in PIO mode. I've noticed that this is leading to extremely low buffer levels during recording at 32x, causing the buffer underrun protection to be invoked frequently. I've not been able to find any information about this on Samsung's websites, and their technical support staff has not answered my queries. Did Samsung purposefully discontinue support of DMA mode for this drive for some reason? Can I flash the firmware back to version R300 safely to recover the DMA functionality?