You can set DMA using hdparm. Probe the drives first with hdparm to see what settings they support. Read the man too as I've read it is possible to hose your data and/or drives if you get it wrong (although I've never had any real problems). I eventually settled for the following (Thinkpad T23): hdparm -c 1 -d 1 -u 1 -m16 -X69 /dev/hda hdparm -c 1 -d 1 -u 1 -X34 /dev/hdc After a bit of testing to ensure these settings would cause no problems, I added them to my startup script. At 07:46 PM 6/13/2003 -0700, you wrote:
I'm running 8.1. I didn't have powertweak installed, so I downloaded
and
installed it, -extra, -gtk, and yast2- for 8.1. I now have
Bernd wrote: powertweak as
an option in Yast, yet I am not able to change any values. My ELEVATOR_READ_LATENCY default is set to 1024.
I also only have DMA setting available as IDE DMA mode, and only for hda.
Any suggestions?
Bernd
I might be mistaken, but isn't it so that there are no pull-down menues or boxes or anything like that in 8.1, you simply type the drives you want to enable DMA for: "hda, hdb, hdc"
I have DMA enabled for all drives and ELEVATOR_READ_LATENCY set to 32 for hdc (DVD) but it still doesn't work -- my guess is that it's due to the CD-R (hdd) on the same IDE channel which is slower than the DVD.
/Lars
On Friday 13 June 2003 11:02, Lars Norén wrote:
Bernd wrote:
Although I do have pulldown menus, I am unable to change anything. I can't alter the default settings at all. I can highlight the entry, but cannot delete the contents of the value box, or enter any new values. Having the powertweak feature in Yast is useless if I can't make any changes on any of the sections listed in powertweak. It just shows me the default info.
How do I set DMA for my drives? How can I change the read-latency?
Unfortunately I don't know anything about Powertveak in SuSE 8.1 and how you can change the read-latency, but when it comes to the DMA settings I think they can be found in the same place as in SuSE 8.2: YaST2 (Control Center) - Hardware - IDE DMA mode.
/Lars
Control Center - IDE DMA only allows me to change DMA on/off for hda!