Storing data sequentially in zones in a dispersed storage network

A processing system of a storage unit in a dispersed storage network (DSN) 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:
• determine zone allocation parameters;
• select a first one of a plurality of storage zones of a memory device of the storage unit to be open for writes based on the zone allocation parameters;
• select a second one of the plurality of storage zones of the memory device of the storage unit to be closed for the writes based on the zone allocation parameters;
• designate the first one of the plurality of storage zones as open for the writes in response to selecting the first one of the plurality of storage zones to be open for the writes;
• designate the second one of the plurality of storage zones as closed for the writes in response to selecting the second one of the plurality of storage zones to be closed for the writes;
• receive, via a network, a first data slice for storage;
• and
• create a vault within the DSN and establish dispersed storage error encoding parameters for the vault.

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:
• determine zone allocation parameters;
• select a first one of a plurality of storage zones of a memory device of the storage unit to be open for writes based on the zone allocation parameters;
• select a second one of the plurality of storage zones of the memory device of the storage unit to be closed for the writes based on the zone allocation parameters;
• designate the first one of the plurality of storage zones as open for the writes in response to selecting the first one of the plurality of storage zones to be open for the writes;
• designate the second one of the plurality of storage zones as closed for the writes in response to selecting the second one of the plurality of storage zones to be closed for the writes;
• receive, via a network, a first data slice for storage;
• and
• create a vault comprising a virtual memory block associated with a portion of an overall namespace of the DSN.