NVME_FEATURE_VALUE_CODES enumeration (nvme.h)

Contains values that indicate which value of a feature should be retrieved or configured by the NVME_ADMIN_COMMAND_GET_FEATURES and NVME_ADMIN_COMMAND_SET_FEATURES Admin commands.

Syntax

typedef enum {
  NVME_FEATURE_VALUE_CURRENT,
  NVME_FEATURE_VALUE_DEFAULT,
  NVME_FEATURE_VALUE_SAVED,
  NVME_FEATURE_VALUE_SUPPORTED_CAPABILITIES
} NVME_FEATURE_VALUE_CODES;

Constants

NVME_FEATURE_VALUE_CURRENT The current operating attribute value for the specified feature.
NVME_FEATURE_VALUE_DEFAULT The default attribute value for the specified feature.
NVME_FEATURE_VALUE_SAVED The last saved attribute value for the specified feature. For example, the last Set Features command completed without error, with the Save bit set to 1 for the specified feature.
NVME_FEATURE_VALUE_SUPPORTED_CAPABILITIES The supported capabilities for the specified feature. The supported capabilities are returned in Dword 0 of the completion entry of the Get Features command, in the following way: - If Dword 0 bit 0 of the completion entry of the Get Features command is set to 1, then the Feature Identifier is saveable. If Dword 0 bit 0 of the completion entry of the Get Features command is cleared to 0, then the Feature Identifier is not saveable. - If Dword 0 bit 1 of the completion entry of the Get Features command is set to 1, then the Feature Identifier is namespace specific and settings are applied to individual namespaces. If Dword 0 bit 1 of the completion entry of the Get Features command is cleared to 0, then the Feature Identifier is not namespace specific and its settings apply to the entire controller. - If Dword 0 bit 2 of the completion entry of the Get Features command is set to 1, then the Feature Identifier is changeable. If Dword 0 bit 2 of the completion entry of the Get Features command is cleared to 0, then the Feature Identifier is not changeable.

Remarks

In the NVME_ADMIN_COMMAND_GET_FEATURES and NVME_ADMIN_COMMAND_SET_FEATURES Admin commands, the feature is specified in the Feature Identifier (FID) member of the NVME_CDW10_GET_FEATURES and NVME_CDW10_SET_FEATURES structures.

If a Get Features command is received with the Select field SEL set to saved and the controller does not support the feature specified by the Feature Identifier being saved or does not currently have any saved values, then the controller treats the Select field as though it was set to default.

Requirements

Requirement	Value
Minimum supported client	Windows 10
Header	nvme.h

See also

NVME_ADMIN_COMMANDS NVME_CDW10_GET_FEATURES NVME_CDW10_SET_FEATURES