Thursday 13 October 2011

RAID-DP

RAID-DP (Double Parity)

Raid DP is a Double Parity disk and this implementation that prevents data loss when two disk fail.

In Raid DP minimum 3 disks required to create one aggregate.

It will support multi disk failure.

In NetApp raid DP is default raid group.        

Example:

filer1> aggr create -r 5 aggr1 10


In this command "aggr create -r 5 aggr1 10"


aggr1 will randomly take 10 disk from spare disk and -r 5 which means each raid group should have 5 disks. 




So obviously here two raid group will create and each raid group should have 5 disks.






d1  d2  d3  P(d4)  DP (d5) => rg0 


d6  d7  d8   P(d 9)  DP (d10) => rg1










Note: 


d1 - d10 which means disk name


P for parity disk


DP for second parity disk


rg0 and rg1 are raid group 0 and 1
























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4 comments:








  1. Unknown1 December 2011 at 02:07
    this commands helped me out,,

    Thank you
    ReplyDelete
  2. Unknown10 September 2012 at 00:06
    Hi Santhosh,

    Thank you for your comments.
    ReplyDelete
  3. Unknown16 December 2013 at 00:28
    hi i really appreciate your effort and this is blog is simply awesome and userfriendly.
    I thank u so much suresh .

    ReplyDelete
  4. Unknown7 July 2014 at 11:46
    thank u so much this Blog is really awesome Bro
    ReplyDelete



































        

      









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