>Check with "hdparm" that your DVD drive (/dev/hdc?) isusing DMA. thanks for you suggestion, it is. Do you recommend any other parameter changes? ~$ hdparm /dev/hdc /dev/hdc: HDIO_GET_MULTCOUNT failed: Invalid argument IO_support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) readonly = 0 (off) readahead = 256 (on) HDIO_GETGEO failed: Invalid argument