[CentOS] question about software Raid 1

John R Pierce pierce at hogranch.com
Sun Sep 21 19:06:37 UTC 2008

Nataraj wrote:
> Thank you John.  I'm pretty sure that raid 5 or 6 would be safe, since
> there is parity checking, however it sounds like this may not be the
> case for raid 1.

the parity on raid5/6 is only checked if you run some sort of scrub, and 
its used to regenerate a failed drive onto a spare or replacement...   
in normal operation, reads will be distributed to the individual drives 
that contain the blocks in question.

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