Data storage with optimized boot files loading
A data storage device includes a memory device and a controller coupled to the memory device. When a boot operation of the data storage device is initiated, the controller retrieves a relevant boot file from the memory device to boot the data storage device with. The relevant boot file to be retrieved from a plurality of boot files may be determined by a write temperature corresponding to the temperature of when the boot file was programmed to the memory device and a read temperature of the boot file during the boot operation. Each boot file of the plurality of boot files is programmed using different programming parameters in order to cover a range of possible retention levels.
1. A data storage device, comprising:
a memory device; and
a controller coupled to the memory device, wherein the controller is configured to:
determine that a boot operation of the data storage device is occurring;
retrieve a boot file from the memory device, wherein:
a plurality of boot files are stored in the memory device;
each of the plurality of boot files corresponds with a different data retention level; and
retrieving the boot file comprises:
determining a data retention level based on environment conditions of the memory device during the boot operation; and
selecting the boot file of the plurality of boot files based on the determining; and
boot the data storage device using the retrieved boot file.
2. The data storage device of claim 1 , wherein a first boot file of the plurality of boot files is associated with a first number of program loop cycles (PLCs) and a second boot file of the plurality of boot files is associated with a second number of PLCs, and wherein the first number of PLCs is different than the second number of PLCs.
3. The data storage device of claim 2 , wherein the first number of PLCs is greater than the second number of PLCs, and wherein the first boot file is associated with a higher data retention level than the second boot file.
4. The data storage device of claim 1 , wherein a first boot file of the plurality of boot files is associated with a first amount of charge saved in one or more floating gates of the memory device and a second boot file of the plurality of boot files is associated with a second amount of charge saved in another one or more floating gates of a corresponding memory cell of the memory device, and wherein the first amount of charge is different than the second amount of charge.
5. The data storage device of claim 4 , wherein the first amount of charge is more precise than the second amount of charge, and wherein the first boot file is associated with a higher data retention level than the second boot file.
6. The data storage device of claim 1 , wherein a first boot file of the plurality of boot files is associated with a plurality of cell states having a first distribution of charges and a second boot file of the plurality of boot files is associated with a plurality of cell states having a second distribution of charges, and wherein the first distribution of charges is different than the second distribution of charges.
7. The data storage device of claim 6 , wherein the first distribution of charges is shifted tighter than the second distribution of charges, and wherein the first boot file is associated with a higher data retention level than the second boot file.
8. The data storage device of claim 1 , wherein determining the data retention level based on the environment conditions of the memory device during the boot operation comprises:
determining a read temperature of the memory device during the boot operation; and
matching the read temperature with a write temperature, wherein the write temperature is a temperature of the boot file when the boot file was programmed to the memory device.
9. The data storage device of claim 8 , wherein the write temperature is stored in a header of the boot file.
10. The data storage device of claim 8 , wherein selecting the boot file of the plurality of boot files based on the determining comprises:
accessing a table storing the write temperature, the read temperature, and a boot file pointer for each of the plurality of boot files.
11. The data storage device of claim 10 , wherein the write temperature and the read temperature corresponds with a range of temperatures.
12. The data storage device of claim 1 , wherein the environment conditions comprises a read count for each boot file of the plurality of boot files.
13. A data storage device, comprising:
a memory device; and
a controller coupled to the memory device, wherein the controller is configured to:
initiate a boot operation;
determine a read temperature of a plurality of boot files;
read metadata from the plurality of boot files, wherein the metadata comprises a write temperature corresponding to each boot file of the plurality of boot files, wherein the write temperature is a temperature of when of a boot file was programmed to the memory device;
match the read temperature and the write temperature to a corresponding boot file, wherein the matching comprises accessing a table storing each boot file and a corresponding read temperature and a corresponding write temperature; and
read the corresponding boot file.
14. The data storage device of claim 13 , further comprising a plurality of temperature sensors configured to read a temperature of the controller and one or more dies of the memory device.
15. The data storage device of claim 13 , wherein the write temperature is a temperature of the memory device while programming each boot file of the plurality of boot files to the memory device.
16. The data storage device of claim 13 , wherein the table further comprises a read threshold for each boot file of the plurality of boot files, wherein the read threshold corresponds to a corresponding one or more cell states.
17. The data storage device of claim 13 , wherein each boot file of the plurality of boot files corresponds with a different data retention level, and wherein each boot file of the plurality of boot files differ in:
an amount of program loop cycles (PLCs);
an amount of charged saved in saved in one or more floating gates of the memory device; and
a distribution of charges corresponding to one or more cell states.
18. A data storage device, comprising:
memory means; and
a controller coupled to the memory means, wherein the controller is configured to:
determine a read temperature of the memory means during a read operation to read data from the memory means, wherein the data comprises a plurality of copies, and wherein each copy of the plurality of copies is programmed with either:
a different amount of program loop cycles (PLCs);
a different amount of charges saved in one or more floating gates of the memory means;
a different distribution of charges corresponding to one or more cell states; or
combinations thereof; and
retrieve a corresponding copy based on the read temperature and a write temperature of the data, wherein the write temperature is a temperature of when the data was programmed to the memory means.
19. The data storage device of claim 18 , wherein the data is a boot file.
20. The data storage device of claim 18 , wherein the write temperature is stored in a header of the data stored in the memory means.