Can't create disks for oracle ASM

Sorry for duplicating my post, I posted it in linux group, but don't know if I also can get help here.
Hi, all advanced,
I am installing oracle 10gR2 in Fedora core 4, and I prefer to use oracle Automatic Storage Management feature. Since oracle doesn't support FC4, I have to set up rRHEL4 kernel core to install ASM driver and configure it. The things went well until I want to create disks for ASM, for example:
# /etc/init.d/oracleasm createdisk DISK1 /dev/hda5
Marking disk "/dev/hda5" as an ASM disk: asmtool: Unable to clear device "/dev/hda5": Input/Output error
When I install the FC4, /dev/hda5 is only one of the partitions in the physical disk, not a full independent physical disk. Same to other disks that I want to put into ASM disks. I google the net but didn't find any similar problem happened to other players. So I need your help!
wand

Hi Rafael,
What version are you using? I have had similar problems in the past. Worst case I had to recreate the widget and copy the coding across.
Can you send me the project file, I will understand also if you do not want to, I will try it on my machine.
Regards
John

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