Storage device and method for storage device state recovery
View Patent ↗A storage device and method for storage device state recovery are provided. In one embodiment, a storage device commences an authentication process to authenticate a host device. The authentication process comprises a plurality of phases, and the storage device stores the state of the authentication process, wherein the state indicates the phase(s) of the authentication process that have been successfully completed. After a power loss, the storage device retrieves the state of the authentication process and resumes an operation with the host device without re-performing the phase(s) of the authentication process that have been completed.
1. A method for recovering a state of an operation in a storage device, the method comprising:
performing the following in a storage device:
receiving a suspend command from a host device;
in response to receiving the suspend command, storing a state of an operation in the storage device;
receiving a recovery command from the host device;
determining if the recovery command indicates that the host device is a pre-authenticated entity;
if the storage device determines that the recovery command indicates that the host device is a pre-authenticated entity:
retrieving the state of the operation; and
resuming the operation from the retrieved state without re-authenticating the host device; and
if the storage device determines that the recovery command does not indicate that the host device is a pre-authenticated entity, operating in a blocked state that indicates a failure to log in.
2. The method of claim 1 , wherein the state is stored in a secure fashion in the storage device.
3. The method of claim 2 , wherein the state is stored in a location in the storage device that is accessible by a controller of the storage device but not by the host device.
4. The method of claim 2 , wherein the storage device comprises a memory with public and private partitions, and wherein the state is stored in the private partition.
5. The method of claim 2 , wherein the state is stored in an encrypted form in the storage device.
6. The method of claim 1 , wherein the recovery command indicates that the host device is a pre-authenticated entity through a secure token.
7. The method of claim 6 , wherein the secure token comprises a function of a session key.
8. The method of claim 7 , wherein the secure token is also a function of a value of a counter.
9. The method of claim 6 , wherein the secure token comprises a function of a session ID.
10. The method of claim 9 , wherein the secure token is also a function of a value of a counter.
11. The method of claim 1 , wherein the memory device commences the operation after authenticating the host device.
12. A storage device comprising:
an interface configured to communicate with a host device;
a memory; and
a controller in communication with the interface and the memory, wherein the controller is configured to:
receive a suspend command from the host device;
in response to receiving the suspend command, store a state of the operation in the storage device, wherein the memory device commenced the operation after authenticating the host device;
receive a recovery command from the host device;
determine if the recovery command indicates that the host device is a pre-authenticated entity;
if the storage device determines that the recovery command indicates that the host device is a pre-authenticated entity:
retrieve the state of the operation; and
resume the operation from the retrieved state without re-authenticating the host device; and
if the storage device determines that the recovery command does not indicate that the host device is a pre-authenticated entity, operating in a blocked state that indicates a failure to log in.
13. The storage device of claim 12 , wherein the state is stored in a secure fashion in the storage device.
14. The storage device of claim 13 , wherein the state is stored in a location in the storage device that is accessible by the controller but not by the host device.
15. The storage device of claim 13 , wherein the memory has public and private partitions, and wherein the state is stored in the private partition.
16. The storage device of claim 13 , wherein the state is stored in an encrypted form in the storage device.
17. The storage device of claim 12 , wherein the recovery command indicates that the host device is a pre-authenticated entity through a secure token.
18. The storage device of claim 17 , wherein the secure token comprises a function of a session key.
19. The storage device of claim 18 , wherein the secure token is also a function of a value of a counter.
20. The storage device of claim 17 , wherein the secure token comprises a function of a session ID.
21. The storage device of claim 20 , wherein the secure token is also a function of a value of a counter.
22. The storage device of claim 12 , wherein the memory device commences the operation after authenticating the host device.