Allocating data based on memory device performance in a dispersed storage network

A processing system of a computing device comprises:

• at least one processor;
• a memory that stores operational instructions, that when executed by the at least one processor cause the processing system to:
• receive first mapping parameter data from a first one of a plurality of storage units in a dispersed storage network (DSN);
• generate first namespace mapping data that indicates a mapping of a plurality of possible slice names to a first plurality of memory devices of the first one of the plurality of storage units by performing a first deterministic mapping function based on the first mapping parameter data;
• generate slice name subset data indicating a subset of the plurality of possible slice names based on a plurality of health status indicators corresponding to the first plurality of memory devices;
• select a first slice name corresponding to a first encoded slice of a first data object from the subset indicated by the slice name subset data;
• and
• generate a first write request for transmission via the network that includes the first encoded slice to the first one of the plurality of storage units.

A non-transitory computer readable storage medium comprises:

• at least one memory section that stores operational instructions that, when executed by a processing system of a dispersed storage network (DSN) that includes a processor and a memory, causes the processing system to:
• receive first mapping parameter data from a first one of a plurality of storage units in a dispersed storage network (DSN);
• generate first namespace mapping data that indicates a mapping of a plurality of possible slice names to a first plurality of memory devices of the first one of the plurality of storage units by performing a first deterministic mapping function based on the first mapping parameter data;
• generate slice name subset data indicating a subset of the plurality of possible slice names based on a plurality of health status indicators corresponding to the first plurality of memory devices;
• select a first slice name corresponding to a first encoded slice of a first data object from the subset indicated by the slice name subset data;
• and
• generate a first write request for transmission via the network that includes the first encoded slice to the first one of the plurality of storage units.