RE: RAID5

  • From: "Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx>
  • To: Fergal Taheny <ftaheny@xxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
  • Date: Thu, 17 Nov 2011 22:43:34 +0000

Hi Fergal, that would only be true if you created your RAID10 array with twice 
as many disks as your RAID5 array, but in this case he said he had 5 disks 
configured as RAID5 and 4 disks configured as RAID10 so that means the RAID10 
array can only read from 4 disks at a time, but the RAID5 can read from 5 disks 
at a time and should be faster if everything else is kept the same.
Regards,
Brandon


From: Fergal Taheny [mailto:ftaheny@xxxxxxxxx]

My understanding and experience is that raid 10 will be much faster for reads 
too because the data is mirrored and so reads can be done from both sides of 
the mirror and so read throughput is double that of a non mirrored stripe.


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