Can I specify the capacity of RAID 10 DM and RAID 6-6 disk space in Tier 1 of SCv2020? - Compellent - Storage - Dell Community

Can I specify the capacity of RAID 10 DM and RAID 6-6 disk space in Tier 1 of SCv2020?

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Can I specify the capacity of RAID 10 DM and RAID 6-6 disk space in Tier 1 of SCv2020?

This question has been answered by Michael Tanenhaus

Dear all,

Can I specify the capacity of RAID 10 DM and RAID 6-6 disk space in Tier 1 of SCv2020?

For Example 20% using for RAId 10 DM and 80% using for RAID 6-6.

Thanks,Natthpahol.

Verified Answer
  • Short Answer - NO!

    Long answer - thats a good thing. Compellent optimizes (by default) the RAID level per block based on what provides the best performance. So in a default world writes are done in RAID10/DM and then those blocks are converted to RAID5/6 in a 24-48 hour period depending on snapshot schedule. From a read point of view there is no benefit of RAID10 - and so it should be minimized.

    You can override per volume this behavior if that default doesnt work.

  • www.dell.com/.../storage-profiles-for-scv2000-series-controllers

All Replies
  • Short Answer - NO!

    Long answer - thats a good thing. Compellent optimizes (by default) the RAID level per block based on what provides the best performance. So in a default world writes are done in RAID10/DM and then those blocks are converted to RAID5/6 in a 24-48 hour period depending on snapshot schedule. From a read point of view there is no benefit of RAID10 - and so it should be minimized.

    You can override per volume this behavior if that default doesnt work.

  • Dear Michel,

    Thank you for your advise. Could you please explain more what kind of option I can do to override per volume?

    Best regards,

    Natthaphol.

  • www.dell.com/.../storage-profiles-for-scv2000-series-controllers

  • Dear Michael,

    Thanks, Can I change the storage profile during the storage system in running? Is there online or I have to move data first?

    Best regards,

    Natthaphol.