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Deciding on RAID for a server which has four hard drives.

I understand that one of the major advantages of RAID 5 is that you lose less hard drives space than with RAID 1.

But with RAID 1, if one of the hard drives fail, doesn't the server continue functioning by running off the second drive?
 

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defencegrid1 said:
But with RAID 1, if one of the hard drives fail, doesn't the server continue functioning by running off the second drive?
Yes, But the same holds true with a RAID 5. The advantage of a RAID 5 is you can replace the failed disk and have it rebuild the array all while not bringing down the server.
If you implement a RAID array, make sure it is a hardware RAID and not a software RAID.
 
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