2 Comments on “What is the minimum number of disks in a non-root aggregate with RAID-DP”

1. Marius says:

   April 17, 2015 at 1:06 pm

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2. Pawan says:

   April 20, 2015 at 9:20 am

   The minimum number of disks in a RAID-DP group is three: at least one data disk, one regular parity disk, and one double-parity (dParity) disk. However, for non-root aggregates with only one RAID group, you must have at least 5 disks (three data disks and two parity disks).

   If there is a data-disk failure or parity-disk failure in a RAID-DP group, Data ONTAP replaces the failed disk in the RAID group with a spare disk and uses the parity data to reconstruct the data of the failed disk on the replacement disk. If there is a double-disk failure, Data ONTAP replaces the failed disks in the RAID group with two spare disks and uses the double-parity data to reconstruct the data of the failed disks on the replacement disks.

   RAID-DP is the default RAID type for all aggregates.

   
   
   
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