[CentOS] pen drive, hard disk, cd not being detected

Wed Jan 26 16:34:37 UTC 2011
Ritika Garg <ritikagarg25 at gmail.com>

Among many messages that 'dmesg' displays, the following seems to indicate
that something might be wrong:
mtrr:type mismatch for c1fe0000,10000 old:write-back new:write-combining

I can't understand what does the above mean?
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