On Thu, 2004-11-04 at 09:28 -0700, Kim Lux wrote: > Could I ask some people to run hdparm on their cdroms and report their > findings to the list ? > > ie: $/sbin/hdparm /dev/hdc (typically, some CDROMs might mount > elsewhere.) > > We've found some CDROMs are not optimized to use 32 bit access and with > the irq still masked. This might result in poor performance when using > them as CD Burners or as a ripping source. > Mine have the problem. First drive is a LiteOn 16X Dual Layer DVD+-RW: /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 The Second is a Sony 52X CD-RW: /dev/hdd: 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 These are the default settings on my system wrt these drives. HTH... Cheers, Chris -- ====================== When the solution is simple, God is answering. -- Albert Einstein