Hi, yesterday I compiled a new kernel (2.6.23-rc3-git10) from Vanilla sources and it works! sudo hdparm -t /dev/scd0 now gives: Timing buffered disk reads: 14 MB in 3.22 seconds = 4.34 MB/sec So, after crawling the web for more than three weeks, this is the solution. :) Therefore other things stop working, but these are another road works. Thanks, Oli - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html