Atomic write command support in a solid state drive

A storage system comprising:

• a non-volatile memory;
• and
• a controller;
• wherein the controller is configured to:
• receive an atomic write command;
• store, based on the atomic write command, data in one or more logical pages (L-Pages), wherein each L-Page among the one or more L-Pages is associated with a logical address;
• generate a system journal (S-Journal) entry for each of the one or more L-Pages, wherein each S-Journal entry comprises a first sequence number associated with the atomic write command;
• determine, based on the S-Journal entries, whether all L-Pages are stored in a non-volatile memory;
• after a power loss event, when all L-Pages are not determined to be stored in the non-volatile memory,
• determine, based on the first sequence number, the minimum L-Page number and the maximum L-Page number, a range of L-Page numbers;
• for each L-Page number in the range of L-Page numbers, determine data in the L-Page associated with the L-Page prior to receiving the atomic write command;
• and
• generate a copy command to store the data, for the L-Pages associated with the range of L-Page numbers, in the non-volatile memory.

A system comprising:

• means for receiving an atomic write command;
• means for storing, based on the atomic write command, data in one or more logical pages (L-Pages), wherein each L-Page among the one or more L-Pages is associated with a logical address;
• means for generating a system journal (S-Journal) entry for each of the one or more L-Pages, wherein each S-Journal entry comprises a first sequence number associated with the atomic write command;
• means for determining, based on the S-Journal entries, whether all L-Pages are stored in a non-volatile memory;
• and
• after a power loss event, in response to determining that all L-Pages are not stored in the non-volatile memory:
• means for determining, based on the first sequence number, a minimum L-Page number, and a maximum L-Page number, a range of L-Page numbers;
• for each L-Page number in the range of L-Page numbers, means for determining data in the L-Page associated with the L-Page prior to receiving the atomic write command;
• and
• means for generating a copy command to store the data, for the L-Pages associated with the range of L-Page numbers, in the non-volatile memory.