On Sat, 16 Jun 2007, David Greaves wrote:
> Neil Brown wrote:
> > On Friday June 15, [email protected] wrote:
> >
> > > As I understand the way
> > > raid works, when you write a block to the array, it will have to read all
> > > the other blocks in the stripe and recalculate the parity and write it
> > > out.
> >
> > Your understanding is incomplete.
>
> Does this help?
> [for future reference so you can paste a url and save the typing for code :) ]
>
> http://linux-raid.osdl.org/index.php/Initial_Array_Creation
i fixed a typo and added one more note which i think is quite fair:
It is also safe to use --assume-clean if you are performing
performance measurements of different raid configurations. Just
be sure to rebuild your array without --assume-clean when you
decide on your final configuration.
-dean
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