nodma for cdrom, dma for hdd?

subatomic · 2005-08-04 21:29:19

I need dma off for the cdrom but would like to have it on for my hdds.
there was something like USE_DMA=0
where do I put this in arch?
is this all I need to do? can I then omit the line ide=nodma in grub?

phrakture · 2005-08-04 21:34:56

append "ide0=dma ide1=nodma" to your kernel params

scarecrow · 2005-08-04 21:59:35

Did you try changing that using "hdparm" as root?
(phracture's suggestion should also work, unless your BIOS settings are restrictive).

subatomic · 2005-08-04 22:34:21

I already changed it!

it's quite a bit quicker. thanx.

subatomic · 2005-08-05 07:52:37

could I have spoken too soon?
system freeze when mounting /dev/hdc. K3b would hang as well.
how is ide0 defined? I mean is this always cdrom?

T-Dawg · 2005-08-05 09:19:06

subatomic wrote:

how is ide0 defined? I mean is this always cdrom?

I would think the 0 would refer to the entire primary eide/ide channel (normally hard drives) and 1 would be the secondary.....

Have you tried the hdparm way?

phrakture · 2005-08-05 15:34:39

subatomic wrote:

could I have spoken too soon?
system freeze when mounting /dev/hdc. K3b would hang as well.
how is ide0 defined? I mean is this always cdrom?

IDE0 is your first ribbon cable... it contains hda and hdb
IDE1 is your second ribbon calbe - hdc and hdd

If that didn't work, I'd suggest using hdparm to set it in rc.local or something

scarecrow · 2005-08-05 18:46:02

Could you check your BIOS settings and see if DMA is enabled for both your IDE channels, and a setting like "PnP OS" is not enabled?

subatomic · 2005-08-09 20:35:57

that was it!
I toggled the BIOS settings and now she purrs

Thanks to EVERYONE

I've just got one other question...

I've got a second HDD (hdb) and when I move files from one folder to another - still residing on hdb - it actually moves it like if I move or copy it from another disc.
how can I get it to act like hda and just change the path?

Arch Linux

#1 2005-08-04 21:29:19

nodma for cdrom, dma for hdd?

#2 2005-08-04 21:34:56

Re: nodma for cdrom, dma for hdd?

#3 2005-08-04 21:59:35

Re: nodma for cdrom, dma for hdd?

#4 2005-08-04 22:34:21

Re: nodma for cdrom, dma for hdd?

#5 2005-08-05 07:52:37

Re: nodma for cdrom, dma for hdd?

#6 2005-08-05 09:19:06

Re: nodma for cdrom, dma for hdd?

#7 2005-08-05 15:34:39

Re: nodma for cdrom, dma for hdd?

#8 2005-08-05 18:46:02

Re: nodma for cdrom, dma for hdd?

#9 2005-08-09 20:35:57

Re: nodma for cdrom, dma for hdd?

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