Using a 4.7 GB 4x DVD+RW I did: (Fedora 19, x86_64, 4GB RAM) mkudffs /dev/sr0 mount /dev/sr0 /dvd0 dd if=some-4gb-file of=/dvd0/bigfile.bin
After a few seconds ls -l /dvd0/bigfile.bin displayed 600 MB which means that more than 30 seconds are kept in RAM. Is it possible to limit the write cache to a sane value for this specific device? (perhaps a few seconds at 2..3 MB/sec write speed) Thanks in advance for anything helpful, Karl PS: dd oflag=direct helps of course but I would like to have a tuning knob to play with to get optimal performance in my situation. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/