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I have a PC with 6 HDD (for data) and 1 SSD (for Centos 6.3) with on board intel RAID 5. I'm pretty aware that upon any hard disk failure the system will continue normally but more stress on the CPU to compute the parity, but how I can be aware that really a hard disk is corrupted and needs to be replaced?

Can the OS be aware of any hard disk failure? If not which part of the BIOS can notify me?

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migrated from stackoverflow.com Oct 13 '12 at 5:00

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You might get answers in serverfault.com –  madth3 Oct 13 '12 at 0:46
    
seriously, why all the hate! –  fawzib Oct 13 '12 at 1:00
    
Not really a question for this site but -3 is harsh –  R0MANARMY Oct 13 '12 at 1:11
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