Messages in this thread | | | From | Bartlomiej Zolnierkiewicz <> | Subject | Re: How to Switch DMA off for only one Harddisk at Kernelboot | Date | Mon, 17 Dec 2007 12:58:59 +0100 |
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On Monday 17 December 2007, Oliver Joa wrote: > Hi, > > Alan Cox wrote: > > [...] > > > For the current kernel and libata you can use libata.dma=3, and it will > > select DMA for disk (1) + CD (2) but not CF cards. With the older IDE it > > should be sufficient to use hda=nodma > > Thanks a lot, but it does not work: > > If I use libata.dma=3 I get the following: > [ 0.000000] Unknown boot option `libata.dma=3': ignoring > > And if I use hda=nodma: > [ 0.000000] ide_setup: hda=nodma -- BAD OPTION > > I use kernel 2.6.21.5. > > Any Idea?
"hdx=nodma" was added in 2.6.24-rc1, older kernels have only "ide=nodma"
Also "ide=nodma" may not work in older kernel with some buggy host drivers (they were fixed in 2.6.24-rc1).
Bart
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