NVM Express 1.3 – DRAFT 3/1/2017
16 NVM Express Confidential
commands that are privileged include Namespace Management, Namespace Attachment, Virtualization
Management, Format NVM, and Sanitize. A privileged register action is NVM subsystem reset. Vendor
specific commands and registers may also be privileged.
1.6.27 Runtime D3 (Power Removed)
In Runtime D3 (RTD3) main power is removed from the controller. Auxiliary power may or may not be
provided.
1.6.28 sanitize operation
Process by which all user data in NVM subsystem is altered such that recovery of the previous user data
from any cache or the non-volatile media is not possible.
1.6.29 secondary controller
An NVM Express controller that depends on a primary controller in an NVM subsystem for management of
some controller resources (refer to section 8.5).
A PCI Express SR-IOV Virtual Function that supports NVM Express and receives resources from a primary
controller is an example of a secondary controller (refer to section 8.5.4).
1.6.30 shared namespace
A namespace that may be attached to two or more controllers in an NVM subsystem concurrently. A host
may determine whether a namespace is a private namespace or may be a shared namespace by the value
of the Namespace Multi-path I/O and Namespace Sharing Capabilities (NMIC) field in the Identify
Namespace data structure.
1.6.31 user data
Data that is composed of logical block data, metadata, and protection information.
1.7 Keywords
Several keywords are used to differentiate between different levels of requirements.
1.7.1 mandatory
A keyword indicating items to be implemented as defined by this specification.
1.7.2 may
A keyword that indicates flexibility of choice with no implied preference.
1.7.3 optional
A keyword that describes features that are not required by this specification. However, if any optional
feature defined by the specification is implemented, the feature shall be implemented in the way defined by
the specification.
1.7.4 R
“R” is used as an abbreviation for “reserved” when the figure or table does not provide sufficient space for
the full word “reserved”.
1.7.5 reserved
A keyword referring to bits, bytes, words, fields, and opcode values that are set-aside for future
standardization. Their use and interpretation may be specified by future extensions to this or other
specifications. A reserved bit, byte, word, field, or register shall be cleared to zero, or in accordance with a
future extension to this specification. The recipient is not required to check reserved bits, bytes, words, or
fields. Receipt of reserved coded values in defined fields in commands shall be reported as an error. Writing
a reserved coded value into a controller register field produces undefined results.
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