Red Hat Bugzilla – Bug 24113
IDE drive not running at full ATA-100
Last modified: 2007-04-18 12:30:43 EDT
Florence Beta 2
This unit has an ATA-100 capable drive and controller, but the kernel is
not enabling mode udma5. Verified by running hdparm -i
Enable udma5 manually using hdparm.
Do not ever use hdparm to enable udma5. Use the "ide1=ata" on the lilo
command-line, but only if you have the proper (80 ribbon) cable.
The reason that the parameter is needed is that linux is not quite capable
of detecting the presence of this cable, and assumes the safe default of not
having the cable.
make that "ide1=ata66"
Closing as not a bug, as this isn't one.