Hi, I noticed that elvtune does not work on FC3 with a 2.6.12.3 (self-compiled) kernel. I also tried it with RH pre-compiled kernels, such as vmlinuz-2.6.12-1.1372_FC3, vmlinuz-2.6.11-1.14_FC3smp, etc. elvtune /dev/sde ioctl get: Invalid argument In fact, I get the same message for all disks, either those on a 3ware controller, or SATA disks directly attached to the motherboard. The hw is a dual opteron mb with 4Gb RAM. I also tried it on another computer running FC3, with no success. Did this command become obsoleted? Is there alternativ? Cheers Gaspar