If you have a machine with Intel 6300ESB ICH5 IDE/SATA controller:
The Linux IDE PIIX driver really sucks on it for some reason. No DMA,
about 2MB/s + lots of CPU load.
If running a kernel which has IDE built-in, and libata provided as
mkinitrd --with=ata_piix /boot/initrd-<version>.img <version>
to the kernel command line arguments (eg by editing
/boot/grub/grub.conf). Reboot and hey presto you should find that
Linux IDE does /not/ claim ownership of your ICH5 IDE/SATA
controllers and hence allows libata's ata_piix to drive it instead
with full DMA goodness and 50MB/s without CPU being eaten alive doing
NB: If your distribution didn't set up /etc/fstab to mount
filesystems by fs label, you will need to adjust /etc/fstab. Fedora
has always setup fstab to mount by label iirc.
Paul Jakma paul at clubi.iepaul at jakma.org Key ID: 64A2FF6A
How many surrealists does it take to screw in a lightbulb?
One to hold the giraffe and one to fill the bathtub with brightly colored
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