Is have RAID (1 + 0) so that Failgroups for all ASM ASM starts is a well-known best practice?

Dear Experts,

Is have RAID (1 + 0) so that Failgroups for all ASM ASM starts is a well-known best practice?

Having both is the best practice

  • RAID (1 + 0)
  • ASM Failgroups for all ASM starts

Thank you

IVW

You can create groups of ASM disks with normal or high redundancy or specify external redundancy. It depends on your reliability requirements and storage performance. Remember that ASM is not RAID and redundancy is the base file. ASM uses alternating devices. Oracle is generally recommended to have redundancy of storage. If you have RAID redundancy at the level of hardware controller or storage, Oracle recommends to configure ASM disks with external redundancy groups. Redundancy of the DSO is only between groups of disk failure and by default, each device's own failure group. Of course, you always want to make sure that you do not rely on redundancy of data between logical devices or partitions residing on a single physical unit. Compared to external RAID redundancy redundancy ASM using will give the DBA more control and transparency on the setting of the underlying.

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