Date: Sun, 12 Nov 2000 22:16:34 +0100 From: "lango" <lango@home.se> To: <freebsd-questions@FreeBSD.ORG> Subject: Disable DMA in kernel? Message-ID: <000a01c04ced$d6b5e960$0100a8c0@lango>
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[-- Attachment #1 --] Yeah I am a freeBSD newbie and I have a lame disk that doesn't work very well with DMA although it says it does. I know how to disable dma with the command sysctl -w hw.atamode=dma,--,pio,pio. ( I have a 19 Gb disk on ata0 and a 8 Gb disk and a Atapi cdrom on ata1, Win2000 on disk0ata0 and freebsd on disk0ata1, I have the bootstrap on disk1ata1). I cant't get it to work automatically in the boot process when i use sysctl.conf in /etc. It say's in the man that sysctl should read in this file but it doenst change the settings. my sysctl.conf look like this hw.atamode=dma,---,pio,pio I can't use DMA since it produces a lot of write errors so I want a way to disabel DMA in the kernel/bootprocess so you dont have to type it in every time. The ideal thing would be to disable it when i compile a new kernel since it produces write errors early in the boot process... [-- Attachment #2 --] <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 5.50.4522.1800" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#c0c0c0> <DIV><FONT face=Arial size=2>Yeah I am a freeBSD newbie and I have a lame disk that doesn't work very well with DMA although it says it does. I know how to disable dma with the command sysctl -w hw.atamode=dma,--,pio,pio. ( I have a 19 Gb disk on ata0 and a 8 Gb disk and a Atapi cdrom on ata1, Win2000 on disk0ata0 </FONT><FONT face=Arial size=2>and freebsd on disk0ata1, I have the bootstrap on disk1ata1</FONT><FONT face=Arial size=2>). I cant't get it to work automatically in the boot process when i use sysctl.conf in /etc. It say's in the man that sysctl should read in this file but it doenst change the settings. my sysctl.conf look like this</FONT></DIV> <DIV><FONT face=Arial size=2>hw.atamode=dma,---,pio,pio</FONT></DIV> <DIV><FONT face=Arial size=2>I can't use DMA since it produces a lot of write errors so I want a way to disabel DMA in the kernel/bootprocess so you dont have to type it in every time. The ideal thing would be to disable it when i compile a new kernel since it produces write errors early in the boot process...</FONT></DIV></BODY></HTML>
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