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Unisphere and Unisphere Central 2020 R1 Administrator's Guide

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Redundancy Requirements

Drive size is used to determine the redundancy level to apply to a tier of drives. If any drive in a tier surpasses a threshold size, a specific redundancy level can be applied to the tier containing that drive. If a redundancy level is required, the Storage Center operating system sets the level and it cannot be changed.

Table 1. HDD Redundancy Recommendations and RequirementsHDD redundancy requirements
Disk Size Level of Redundancy Recommended or Enforced
Up to 3 TB Dual redundant is the recommended level
NOTE Non-redundant storage is not an option for SCv2000 Series storage systems.
3 TB and higher Dual redundant is required and enforced
Table 2. SSD Redundancy Recommendations and RequirementsSSD redundancy requirements
Disk Size Level of Redundancy Recommended or Enforced
Up to 18 TB Dual redundant is the recommended level
NOTE Non-redundant storage is not an option for SCv2000 Series storage systems.
18 TB and higher Dual redundant is required and enforced

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