On Friday, 2006-12-15 at 02:25:54 -0500, Erick Perez wrote:

> Just wondering about the ide=nodma parameter.....what is the specific purpose?

Many Compact Flash cards do not support DMA.

> In my epia motherboard my timings are this:

> booting with ide=nodma from powerup to login prompt  2minutes 45secs.
> same but without ide=nodma......... 38 seconds.

> why?

Because DMA is faster.

> well evertime astlinux boots it checks my fresh 2.5 inch 40gig disk.
> It takes about 2 minutes and 10 seconds to check it with ide=nodma.
> the remaining of the time is the booting process.

> but without ide=nodma, it takes 21 seconds to check the disk and the
> remaining time to boot.

> Comments?

Remove ide=nodma for systems that support DMA...

It would be a Good Thing(tm) if the Linux kernel auto-detected the DMA
capability and used DMA if it is available. AFAIK no such thing is in
the pipeline because few hardware options do not support DMA these days.

Lupe Christoph
-- 
| You know we're sitting on four million pounds of fuel, one nuclear     |
| weapon and a thing that has 270,000 moving parts built by the lowest   |
| bidder. Makes you feel good, doesn't it?                               |
| Rockhound in "Armageddon", 1998, about the Space Shuttle               |
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