iB::Topic::Skipping UDMA on boot command line?

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Topic: Skipping UDMA on boot command line?

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dallas7

Group: Members
Posts: 36
Joined: Sep. 2003

Posted: Nov. 26 2004,12:47

I'm not running off the Live CD.
I've got DSL installed on my hard drive.
I see in my original post I didn't make that clear.
Sorry.
Thanks!

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Your Jedi mind tricks won't work on me, Skywalker.

cbagger01

Group: Members
Posts: 4264
Joined: Oct. 2003

Posted: Nov. 26 2004,20:24

OK,

Then edit the "append" line in your lilo configuration file.

Save it, and then run lilo -v

dallas7

Group: Members
Posts: 36
Joined: Sep. 2003

Posted: Dec. 02 2004,00:22

Quote (ico2 @ Nov. 25 2004,08:31)

dma is turned off by default, do you really need it?

With dma off Firefox takes 18 seconds to load.

With dma on, 3 seconds.

This behavior is consistently demonstratable and repeatable.

Do I need it? No.

Do I want it? Yep.

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Your Jedi mind tricks won't work on me, Skywalker.

cbagger01

Group: Members
Posts: 4264
Joined: Oct. 2003

Posted: Dec. 02 2004,03:00

dma is used by default whenever possible for most operating systems.

The only downside for dma is that it causes problem with a small number of IDE disk controllers, especially for IDE/ATAPI CD drives.

Chances are, if you have a modern computer it will work just fine for your hard drives and will also work for many CD drives. If you start to get a bunch of "cloop errors" at boot time then it can mean that your CD drive is not working properly with your IDE controller with DMA turned ON.

In this situation, it is better to start DSL without the "dma" boot command and then pick and choose the individual drives to be enabled with the hdparm command line utility.