Mount-time reconciliation of data availability

摘要

Systems and methods are disclosed for mount-time reconciliation of data availability. During system boot-up, a non-volatile memory (“NVM”) driver can be enumerated, and an NVM driver mapping can be obtained. The NVM driver mapping can include the actual availability of LBAs in the NVM. A file system can then be mounted, and a file system allocation state can be generated. The file system allocation state can indicate the file system's view of the availability of LBAs. Subsequently, data availability reconciliation can be performed. That is, the file system allocation state and the NVM driver mapping can be overlaid and compared with one another in order to expose any discrepancies.

主权项

1. A non-volatile memory system, comprising:
a non-volatile memory (NVM); and a controller operative to communicate with the NVM, wherein when a file system is being mounted, the controller is further operative to: receive a command to verify whether a range of logical block addresses (LBAs) exists in a consistent state according to a NVM driver mapping of the NVM; determine, in response to the received command, whether each LBA in the range of LBAs exists in the consistent state; and when it is determined that at least one of the LBAs in the range does not exist in the consistent state, transmit an indication that the range contains an inconsistent state.