Hi, i use a SATA Harddisk (Seagate 120GB) with Fedora Core 4. Everything in the System is up to date (yum). When i do this: hdparm -tT /dev/sda I get the following error: /dev/sda: Timing cached reads: 1944 MB in 2.00 seconds = 971.94 MB/sec HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device Timing buffered disk reads: 170 MB in 3.01 seconds = 56.51 MB/sec HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device Its not very fast and the error message is not so good i think. What can i do to solve the Problem? I also tried FC 4 on different Mainboards with different SATA Harddisk. Same error every time. On FC3 with SATA there are no Problems! Downgrading is not possible. I hope someone can help me?! Thank you very much! regards Sebastian I first found this bug around kernel 2.6.6 or so. I believe it didn't go away until 2.6.13 for me. With the bug, my buffer disk reads went down 10 MB or so. I never actually noticed any difference in speed, it might have been just a bad benchmark. Advice I received was never use hdparm for testing if you want quality results. I don't really know much more about the topic. Stephen
