NVME_ACCESS_FREQUENCIES enumeration (nvme.h)

Defines values that indicate the frequency of read and write access to a Logical Block Addressing (LBA) range.

Syntax

typedef enum {
  NVME_ACCESS_FREQUENCY_NONE,
  NVME_ACCESS_FREQUENCY_TYPICAL,
  NVME_ACCESS_FREQUENCY_INFR_WRITE_INFR_READ,
  NVME_ACCESS_FREQUENCY_INFR_WRITE_FR_READ,
  NVME_ACCESS_FREQUENCY_FR_WRITE_INFR_READ,
  NVME_ACCESS_FREQUENCY_FR_WRITE_FR_READ,
  NVME_ACCESS_FREQUENCY_ONE_TIME_READ,
  NVME_ACCESS_FREQUENCY_SPECULATIVE_READ,
  NVME_ACCESS_FREQUENCY_WILL_BE_OVERWRITTEN
} NVME_ACCESS_FREQUENCIES;

Constants

NVME_ACCESS_FREQUENCY_NONE No frequency information provided.
NVME_ACCESS_FREQUENCY_TYPICAL The typical number of reads and writes expected for this LBA range.
NVME_ACCESS_FREQUENCY_INFR_WRITE_INFR_READ Indicates infrequent writes and infrequent reads to the LBA range.
NVME_ACCESS_FREQUENCY_INFR_WRITE_FR_READ Indicates infrequent writes and frequent reads to the LBA range.
NVME_ACCESS_FREQUENCY_FR_WRITE_INFR_READ Indicates frequent writes and infrequent reads to the LBA range.
NVME_ACCESS_FREQUENCY_FR_WRITE_FR_READ Indicates frequent writes and frequent reads to the LBA range.
NVME_ACCESS_FREQUENCY_ONE_TIME_READ A one time read. For example, the command is due to a virus scan, backup, file copy, or archive.
NVME_ACCESS_FREQUENCY_SPECULATIVE_READ A speculative read. The command is part of a prefetch operation.
NVME_ACCESS_FREQUENCY_WILL_BE_OVERWRITTEN The LBA range is going to be overwritten in the near future.

Remarks

This enumeration is used to specify values in the AccessFrequency field of the NVME_CDW13_READ_WRITE structure and in the AccessFrequency field of the NVME_CONTEXT_ATTRIBUTES structure.

Requirements

Requirement	Value
Minimum supported client	Windows 10
Header	nvme.h

See also

NVME_CDW13_READ_WRITE struct