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		It's possible your ICH10 is not the R version and that could be a reason not to enter RAID mode.
3a05	82801JD/DO (ICH10 Family) SATA RAID Controller
3a06	82801JD/DO (ICH10 Family) 2-port SATA IDE Controller
3a14	82801JDO (ICH10DO) LPC Interface Controller
3a16	82801JIR (ICH10R) LPC Interface Controller
3a18	82801JIB (ICH10) LPC Interface Controller
3a1a	82801JD (ICH10D) LPC Interface Controller
3a20	82801JI (ICH10 Family) 4 port SATA IDE Controller #1
3a22	82801JI (ICH10 Family) SATA AHCI Controller
3a25	82801JIR (ICH10R) SATA RAID Controller
3a26	82801JI (ICH10 Family) 2 port SATA IDE Controller #2
3a30	82801JI (ICH10 Family) SMBus Controller
3a32	82801JI (ICH10 Family) Thermal Subsystem
3a34	82801JI (ICH10 Family) USB UHCI Controller #1
You should open the PC and look for exact name of the ICH10 chip. 82801JIR if good, 82801JI is not good.
	
	
	
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