Access request management using sub-commands

A system, comprising:

• a group of memory devices;
• and
• a controller configured to manage the group of memory devices, the controller configured to:
• receive access requests including a first access request and a second access request to access one or more memory devices of the group;
• simultaneously issue a first set of sub-commands corresponding to the first access request to cause the first set of sub-commands to be executed on a respective one of the group of memory devices;
• simultaneously issue a second set of sub-commands corresponding to the second access request to cause the second set of sub-commands to be executed on a respective one of the group of memory devices, while an error recovery operation is being performed;
• and
• transmit a respective response corresponding to the first or the second access requests based at least in part on respective statuses of one or more sub-commands corresponding to the first or the second access request.

A method, comprising:

• receiving an access request to access one or more memory devices of a group of memory devices;
• issuing a set of sub-commands corresponding to the access request to one or more memory devices of the group;
• responsive to receiving respective sub-responses for the set of sub-commands indicating completed performance of respective operations corresponding to the respective sub-responses, updating respective statuses of the set of sub-commands to indicate the completed performance;
• responsive to at least one of the respective sub-responses indicating one or more errors on data stored in the group of memory devices:
• performing an error recovery operation to recover the data stored in the group of memory devices;
• and
• updating the respective statuses of the set of sub-commands to indicate the completed performance subsequent to performing the error recovery operation;
• and
• subsequent to updating the respective statuses of the set of sub-commands, transmitting a response corresponding to the access request.

A method, comprising:

• receiving, from a host, an access request to write first data to a first memory device of a group of memory devices;
• simultaneously issuing a first set of sub-commands corresponding to the write request to:
• the first memory device to cause the first memory device to retrieve second data stored in the first memory device to a controller;
• and
• a second memory device of the group of memory devices to cause the second memory device to retrieve error recovery data to the controller;
• updating, responsive to receiving the second data and the error recovery data, the error recovery data based on a comparison among the first data, the second data, and the error recovery data;
• simultaneously issuing a second set of sub-commands to:
• the first memory device to cause the first memory device to write the first data to a particular location of the first memory device;
• and
• the second memory device to cause the second memory device to write the updated error recovery data to a particular location of the second memory device;
• and
• transmitting a response corresponding to the access request based on a status of a respective one of the first set and the second set of sub-commands.