Extract the archive and open the "AppleIntelPIIXATA.pbproj" file in XCode and hit Command-B to build it. If you have XCode installed, you can build it yourself it's included with the Darwin sources. Assuming you have an Intel system, you need to get the AppleIntelPIIXATA driver installed. What it comes down to is, as you suspected, you're not running Ultra-DMA but rather PIO because you don't have a proper driver for your ATA chipset. Ok, this was pissing me off immensely so I dug into it and have a fix (for Intel chipsets anyway). If you have any problems, delete the kexts that you added, and rename the originals back to their original filenames.) (Remember that your original kext files have been renamed with a ".disabled" extension. (Don't worry, Tiger will rebuild these files on startup.) Sudo chown -R root:wheel IOATAFamily.kextĦ) Just to be on the safe side, delete the following files (not sure if this is necessary): Sudo chown -R root:wheel AppleIntelPIIXATA.kextĤ) If, after a SECOND reboot, the speed boost has disappeared, download IOATAFamily.kext from here: (This comes off of the Darwin 8.01 install CD.) Sudo mv AppleIntelPIIXATA.kext (Just in case you already have this kext installed. If you're getting speeds around 2-3 Megs/Sec, then the following steps should hopefully fix the problem for you.ġ) Download AppleIntelPIIXATA.kext from here: (Thank you, madcowsb!)Ī (Double-click it to extract it.) To check your hard drive speed, download Xbench from here:Īnd do the disk test. NOTE: This fix only seems to work for Intel chipsets.
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