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How disks can be combined for the SAS disk connection type

You can combine SAS disk shelves and SATA disk shelves within the same stack, although this configuration is not recommended.

Each SAS-connected disk shelf can contain only one type of disk (SAS or SATA). The only exception to this rule is if the shelf is being used for a Flash Pool aggregate. In that case, for some SSD sizes and shelf models, you can combine SSDs and HDDs in the same shelf. For more information, see the Hardware Universe.