use/cause of ide=nodma boot parameter?
Pavel R
e97665728 at 013.net
Wed Sep 15 07:50:13 UTC 2004
John Best wrote:
>Through my difficult time trying to get started with FC2, I found that I
>needed to use the ide=nodma boot parameter to get things to work. Failure
>to do so resulted in a system hang while loading the appropriate disk/io
>drivers during boot/install. My question to the group is..
>
>Is this caused by a misconfiguration of the IDE environment or other HW
>problem? Or is this just something that happens? Does use of this
>parameter cause/create any other issues (disable functionality, increase
>risk, compatibility?)
>
>
I think that it just happens. Some drives do not work reliable with DMA.
This setting supposed to be harmless in terms of
compatibility/functionality.
>Computer is ASUS p4pe with 2.4Ghz, 512M
>
>IDE Setup
>IDE 1
>MASTER West Dig - 160 G (2 - 80 G partitions) for Windows C & D drives
>SLAVE Maxtor 40G for Fedora
>
>IDE2
>Master HP 9300i CDWRITER
>Slave Generic 50x CDRom
>
>Some thoughts included improper jumper settings (Master, slave, Cable
>Select) or improper devices as Master slave, or
>a hw compatibility issue (like with the generic 50x cdrom not supporting the
>correct spec)...
>
>
>Though I had no problem with Redhat 9 nor with windows...
>
>
IIRC, RH9 did not enable DMA by default, and windows does not enable it
either (at least for some disks).
>Thanks.
>
>John Best
>jbest at insightbb.com
>
>
>
Pavel.
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