DRAM-less SSD with recovery from HMB loss

A data storage device, comprising:

• a memory device;
• and
• a controller coupled to the memory device, wherein the data storage device is DRAM-less, and wherein the controller is configured to:
• determine that a connection between the controller and a host memory buffer (HMB) of a host device has been restored, wherein the connection between the host device and the data storage device is rebooted in response to a re-try limit of a command being reached, wherein re-trying the command comprises resending the command to the data storage device from the host device in response to a re-try suggestion sent by the controller to the host device;
• copy a flash translation layer (FTL) table from the memory device to the HMB, wherein the copying occurs after the connection between the controller and the HMB has been restored;
• and
• execute one or more commands stored in a command database.

A data storage device, comprising:

• memory means;
• and
• a controller coupled to the memory means, wherein the data storage device is DRAM-less, and wherein the controller is configured to:
• receive a command from a host device for a first time;
• send an error indication with a re-try suggestion for the command to the host device, wherein a connection between the host device and the data storage device is rebooted responsive to a re-try limit of a command being reached;
• receive, after the connection is rebooted, the command from the host device for a second time in response to the sending the re-try suggestion;
• and
• execute the command, wherein between sending the error indication and executing the command, the controller is configured to load a flash translation layer (FTL) table from the memory means.