Hi all, first, excuse me for boring the entire list with this question that has (I think so) already been solved.
I've got a 'little' problem with DMA feature... I use a motherboard with a SIS5513 IDE chipset and two UDMA hard disk. I run a 2.2.17 home build kernel. Here come an extract of the dmesg output : ... SIS5513: IDE controller on PCI bus 00 dev 09 SIS5513: not 100% native mode: will probe irqs later SIS5513: simplex device: DMA disabled ide0: SIS5513 Bus-Master DMA disabled (BIOS) SIS5513: simplex device: DMA disabled ide1: SIS5513 Bus-Master DMA disabled (BIOS) hda: QUANTUM FIREBALL CR8.4A, ATA DISK drive hdb: QUANTUM FIREBALL ST4.3A, ATA DISK drive ... I use the UDMA feature under M$ and it works fine. So, I made a little search on the net and found information about my problem. The informations that I have collected mention Andre's IDE patches avalaible at http://www.kernel.org/pub/linux/kernel/people/hedrick/ Then, I took a look at thoses patches and found in the README.IDE.BACKPORT.FINAL file (http://www.kernel.org/pub/linux/kernel/people/hedrick/README.IDE.BACKPORT.F INAL) the following note : README.IDE This directory will have stable and test patch code that are solely related to various IDE-Block devices and chipset specific code. README.IDE.BACKPORT.FINAL These are the last backport patchs. ide.2.2.17.all.20000904.patch ide.2.2.18-3.all.20000904.patch I do not have any more time to back port. Only dead critical issues will be addressed. Sorry. Andre Hedrick The Linux ATA/IDE guy He come my question : what are BACKPORT patches ? Andea Hedrick talks about last patches from 2000/09/04. However, I found version from the 2000/11/20. Are the patches from the latest release the right one to apply ? Does anybody have already applied succesfully this patch ? Is there any thing to take care of ? Thank for your experience -- Pascal Thivent