SANtricity 11 Manuals (CA08872-010)

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SSD Cache restrictions

Learn about the restrictions when using SSD Cache on your storage system.

Restrictions

  • Any volume assigned to use a controller’s SSD Cache is not eligible for an automatic load balance transfer.

  • Currently, only one SSD Cache is supported per storage system.

  • The maximum usable SSD Cache capacity on a storage system is 8 TB.

  • SSD Cache is not supported on snapshot images.

  • SANtricity 11.80 or later, this feature is supported on ETERNUS AB3100 and ETERNUS AB6100 controllers using HDDs with SAS extensions. Either NVMe SSD or SAS SSD can be used as SSD Read cache. However, they cannot be mixed.

  • If you import or export volumes that are SSD Cache enabled or disabled, the cached data is not imported or exported.

  • You cannot remove the last drive in an SSD Cache without first deleting the SSD Cache.

Restrictions with Drive Security

  • You can enable security on SSD Cache only when you create the SSD Cache. You cannot enable security later as you can on a volume.

  • If you mix drives that are secure-capable with drives that are not secure-capable in SSD Cache, you cannot enable Drive Security for these drives.

  • Secure-enabled volumes must have an SSD Cache that is secure enabled.

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