Does Intel support disabling Hardware prefetcher through MSR for core i7?

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http://stackoverflow.com – Does Intel support modification of MSR bit via msr tools ? I got the error message while trying to change bit 9 to disable hardware prefetcher in Intel i7 . [root@ ./wrmsr -p 0 0x1a0 0x850289 wrmsr:pwrite: Input/output error Also there is no option in Bios. So my question is does Intel stopped supporting Disabling Hardware prefetching or modification MSR bit ? ANy help or link in this matter will be highly appreciated. Thanks in advance. (HowTos)