Data Storage Device and Method for Speculation-Driven Partial Shutdown

A method comprising:

• performing in a data storage device:
• receiving, from a host, a speculation weight indicative of an impending ungraceful shutdown of the data storage device;
• determining whether the speculation weight is above a first threshold;
• and
• in response to determining that the speculation weight is above the first threshold, performing a partial shutdown of the data storage device;
• wherein:
• in response to a number of pending host input/output commands in the data storage device being below a second threshold, the speculation weight is below the first threshold, irrespective of a power state of the host;
• and
• a type of procedure performed as part of the partial shutdown depends on a value of the speculation weight, which depends on the power state of the host.

A data storage device comprising:

• a memory;
• and
• means for:
• receiving, from a host, a speculation weight indicative of an impending ungraceful shutdown of the data storage device;
• determining whether the speculation weight is above a first threshold;
• and
• in response to determining that the speculation weight is above the first threshold, performing a partial shutdown of the data storage device;
• wherein:
• in response to a number of pending host input/output commands in the data storage device being below a second threshold, the speculation weight is below the first threshold, irrespective of a power state of the host;
• and
• a type of procedure performed as part of the partial shutdown depends on a value of the speculation weight, which depends on the power state of the host.