Information technology — Storage management — Part 5: File systems (Adopted ISO/IEC 24775-5:2021, second edition, 2021-03)
Standards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the SCC Mirror Committee (SMC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC.
For brevity, this Standard will be referred to as CSA ISO/IEC 24775-5 throughout.
This Standard replaces CAN/CSA-ISO/IEC 24775:12 (adopted ISO/IEC 24775:2011).
The International Standard was reviewed by the CSA TCIT under the jurisdiction of the CSA Strategic Steering Committee on Information and Communications Technology and deemed acceptable for use in Canada. This Standard has been formally approved, without modification, by the Technical Committee and has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.
The Filesystems part of the Storage Management Technical Specification defines management profiles for Autonomous (top level) profiles for programs and devices whose central function is providing support and access to file data. In addition, it provides documentation of component profiles that deal with filesystems and management interface functions that may be used by other autonomous profiles not included in this part of the specification.
There is an informative annex that describes how storage is mapped from block storage to file shares exported by the filesystem and the mechanisms involved in that establishing those mappings. This annex is recommended for getting an overview of how the filesystem models work.
This version of the Filesystems part of the Storage Management Technical Specification includes two autonomous profiles:
• The NAS Head Profile
This profile defines the model and functions of a NAS device that exports file shares to remote users and gets its storage from a SAN (array devices attached to the NAS Head device).
• The Self-Contained NAS Profile
This profile defines the model and functions of a NAS device that exports file shares to remote users, but gets its storage from disk drives that are internal to the NAS device (instead of externally attached arrays).
In addition to these autonomous profiles, this part of the specification defines a number of component profiles, which are used by the autonomous NAS profiles and might also be used by other autonomous profiles that feature filesystem elements and services. The component profiles defined in this version of the specification include:
• The File Export (component) Profile
This component profile defines the elements used to model the exporting of filesystems or directories for any autonomous profile that exports file data to remote systems.
• The File Export Manipulation (component) Profile
This component profile defines the elements used to model the services for creating, modifying and deleting the file shares (the representation of exported filesystems or directories) for any autonomous profile that provides manipulation of exported filesystems or directories.
• The File Storage (component) Profile
This component profile defines the elements used to model the storage of filesystems on logical disks. This profile does not have services for maintaining the mapping of filesystems to logical disks. These services are addressed in the Filesystem Manipulation Profile.
• The Filesystem (component) Profile
This component profile defines the elements used to model filesystems and its related elements, such as logical files, directories and information on how the filesystem is addressed when mounted to a specific system. The services for defining and maintaining the information in the Filesystem Profile are contained in the Filesystem Manipulation Profile.
• The Filesystem Manipulation (component) Profile
This component profile defines the elements used to model the services for creating, modifying and deleting filesystems and their related elements.
• The Filesystem Quotas (component) Profile
This component profile defines the elements used to model the elements associated with creating, maintaining and reporting on quotas on various filesystem elements.