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raid recomendation



hi, i have a new dell r720 server with 5 600gb disks.
his function will be a postgresql server (the size of the databases is really small with 600gb we should be fine for a long time).

which raid configuration would you recommend?
i was thinking in raid 5 with all five disks but i am not a expert.

i prefer redundandcy against size (i mean, i can sacrifice space). and i dont want performance degradation for doing raid with an incorrect number of disks.

thanks in advance!

--
Roberto Scattini


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