On Tuesday 30 November 2004 16:13, Curtis Sloan wrote: > On Fri November 26 2004 22:31, Kevin Anderson wrote: > > A couple of days ago there was some discussion about the amount of Power > > that people's PCs are using. Linux users seem to rarely take advantage > > of the power saving features in newer monitors in particular. I came > > across an article tonight that's both brief, and easy to read, so I > > thought I'd pass it along. Apologies in advance to anyone with a slow > > connection. > > > > > > It's also worth noting that hdparm can be used to set the spindown times > > on your HDD/CD/DVDs. It's a bit confusing, but I'll show it below, since > > we really never did discuss the details of it all in the last thread. > > > > hdparm -S180 /dev/hda > > I have a couple of questions... > > 1) Does the -S option imply you need APM in the kernel? All the > references I could see in the man page referred to APM. I have ACPI > compiled in but not APM.
I've only compiled in ACPI, and it's working for me. So I'd say no. > 2) Has anyone played/experimented with the -p option (sets PIO modes). I > have my DMA/UDMA modes tweaked; I'm just wondering if the -p option has any > effect (including fallback), but I'm too scared to practice on my only > machine. <grin> I never worry about it. If you type hdparm -I /dev/hda, it will show you a significant about of information about your drive, including all the various modes it does support. There will be an astrix beside the mode the device is currently operating in. You can basically pick either PIO or UDMA mode. I can't think of any reason at all to go with PIO on a device that supports DMA. It's much slower, and will drastically increase your CPU utilization during IO activity. Kev. _______________________________________________ clug-talk mailing list [EMAIL PROTECTED] http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
