Oliver Joa wrote: > Hi, > > Gabriel C wrote: >> Oliver Joa wrote: >>> Hi, >> Hi Oliver , >> >>> how can I tell the kernel not to probe DMA for a specific harddisk (e.g. >>> hda). My first Drive (hda) is a Compact-Flash Card which can not do DMA. >>> The kernel tries at boot to switch to DMA but fails. If I use ide=nodma, >>> the kernel boots about 2 minutes faster, but then I can not switch on >>> DMA for the second Drive (hdc) which is a normal Harddisk. Do I have to >>> live with this 2 minutes waiting time or is there another solution? I >>> did not find any kernel-parameter for this purpose. >>> >>> Sorry if I ask here, but I can not find any solution, and I asked >>> already in other groups. >>> >>> Thank you very much >> Should work with hda=nodma or ideX=nodma ( where X is your HDD nr , in your case is 0 ) > > I tried this already, it does not work. > >> Also have a look at Documentation/ide.txt. > > I read this already. Searching for "nodma" in this document gives only > one line: > > "ide=nodma" : disable DMA globally for the IDE subsystem. > > If the documentation is correct hda=nodma and ideX=nodma should not > work. I use kernel 2.6.23.1 at the moment. grep nodma Documentation/ide.txt "hdx=nodma" : disallow DMA ide=foo_option is for the whole ide sub-system where ideX|hdX=foo_option is just for that HDD. Anyway I've CC'ed linux-ide. > > Thanks > > Olli > Gabriel - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
