Red Hat Enterprise Linux ES release 4 (Nahant Update 1)

[KC]

Hi all

I am using the "Red Hat Enterprise Linux ES release 4 (Nahant Update 1)"
kernel  2.6.9-11.ELsmp in the machine 
2 x AMD Dual Core AMD Opteron(tm) Processor 275

When we reboot machine, sometimes it is hanging on 
"Enabling swap space"

after reset, booting is successful. but got an error message
/etc/rc3.d/S00microcode_ctl: microcode device /dev/cpu/microcode doesn't
exist?

do you know what is the exacting problem?

Can we diable microcode?

Thank you