On Sun, 8 Aug 2004, Andrew Walrond wrote: > I've got two 120Gb ide drives which I want to raid0 for performance, and > my m/b has two IDE buses built in. > > The linux-raid howto suggests putting one drive on each bus, because > slave disks spoil performance. > > Thats fine, I've got the usual two buses, but my question is: > > Where should I put the CDROM drive? Just make it a slave on one of the buses. > Is the very existence of a slave device the source of the performance > degredation, or just that the bandwidth has to be shared between the devices > (so not a problem unless the cdrom is being accessed)? It won't be a problem uless you access it, and even then, as it's so slow compared to the IDE drive (assumimng everything is DMA then it'll be just fine) > Also, I remember from years ago that the cdrom could pull the whole bus > down to some lower performance level (even if still using and 80wire > cable?). Is this still the case? (The hardware in question is recent). It shouldn't be a problem with modern hardware. Gordon Ps. Familiar name ... - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
