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Why does capacity remain unchanged when converting from RAID-DP to RAID-TEC?

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Applies to

  • NetApp AFF-C250
  • Advanced Drive Partitioning (ADP)
  • RAID-DP (Double Parity)
  • RAID-TEC (Triple Parity)
  • Existing RAID-DP with 5 data disks + 2 parity disks + 1 spare disk

Answer

  • The existing aggregate capacity remains unchanged because the spare partitions in RAID-DP are added to the RAID groups during conversion to RAID-TEC.
  • RAID-DP: 7 partitions (5 data + 2 parity) + 1 spare
  • RAID-TEC: 8 partitions (5 data + 3 parity)
  • Data partitions remain the same (5), so usable capacity does not change.
  • Check details with the command:
::> run -node * -command sysconfig -r

Additional Information

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.