Date: Mon, 31 Jan 2000 02:33:19 -0200 From: =?iso-8859-1?Q?Jo=E3o?= Carlos Mendes =?iso-8859-1?Q?Lu=EDs?= <jonny@coe.ufrj.br> To: hardware@freebsd.org Subject: Disable DMA in only one disk, with ata driver Message-ID: <3895108E.4355268B@coe.ufrj.br>
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Hi, I have a setup with FreeBSD current and 3 IDE drives (Western Digital). One of them does not work well with DMA, and I'd like to disable DMA for it, but keep it enabled for the others. How can I do that, using the new ata driver? Would it be interesting to have flag options disk by disk specifying which PIO/DMA mode to run? Is it difficult to implement? Something like: 0x0007 - Mask for the higher mode 0x0008 - PIO/DMA 0x0010 - Limit mode Example: flags 0x0012 -> limit to PIO mode 2 flags 0x0019 -> limit to DMA mode 1 Thanks in advance, Jonny PS: Is this the best list for this discussion? -- João Carlos Mendes Luís jonny@jonny.eng.br Networking Engineer jcml@ieee.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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