Overview
ISO/IEC 17760-302:2025 specifies the AT Attachment (ATA) command set for zoned storage devices, known as Zoned Device ATA Command Set-2 (ZAC-2). This international standard, maintained by ISO and IEC, is vital for ensure interoperability between host systems and storage devices using advanced zoning features. It is designed to serve system manufacturers, integrators, software providers, and storage device suppliers who implement one or more zoning feature sets. The standard also maintains backward compatibility with established ATA standards, enabling reliable deployment in established storage ecosystems.
Key Topics
- ATA Command Set for Zoned Devices: Defines a common command set supporting zoned device functionality, focusing on Host Aware Zones, Host Managed Zones, Zone Domains, and Zone Realms.
- Host Aware and Host Managed Zones: Covers feature sets for devices that are capable of managing zones autonomously or via explicit host control, addressing enhanced storage management and workload optimization.
- Zone Domains and Zone Realms: Specifies command support for dividing storage devices into multiple logical groupings (domains) and segregated operational realms, allowing advanced partitioning and data placement strategies.
- Command Descriptions and Management: Details robust ATA commands for managing zones (opening, closing, finishing, and reporting), along with provisions for zone status, resource handling, and error conditions.
- Compatibility and Interoperability: Ensures integration across the evolving range of zoned devices with continued compatibility with existing ATA standards, specifically referencing ACS-5 and related command sets.
Applications
ISO/IEC 17760-302:2025 is applicable across a broad spectrum of information technology deployments, including:
- Enterprise Data Centers: Enables high-capacity and high-efficiency storage solutions where zoned storage devices such as Shingled Magnetic Recording (SMR) drives or Zoned Namespace SSDs are deployed for sequential write optimization and improved throughput.
- Cloud Storage Infrastructure: Provides cloud service providers with uniform device-management protocols, ensuring scalable and robust storage architectures.
- Operating System and Software Development: Supports developers of storage stack software, file systems, virtualization layers, and data management solutions in implementing standardized communication with zoned devices.
- System Integration: Assists original equipment manufacturers (OEMs) and system builders in creating interoperable and reliable storage subsystems tailored to diverse application workloads.
- Research and Next-Generation Storage: Fosters innovation in storage device firmware, data placement algorithms, and performance optimization by providing a standardized foundation for advanced zone management.
Related Standards
To maximize compatibility in storage environments and align with industry best practices, consider the following related standards:
- ISO/IEC 17760 series: Comprehensive standards for AT Attachment, providing the overarching ATA/ATAPI framework.
- ATA8-ACS (Advanced Command Set) / ACS-5: Defines the baseline ATA command sets, with which ZAC-2 maintains compatibility.
- INCITS 558-202x: North American equivalent specification for AT Attachment device features.
- SATA (Serial ATA) I/O Specifications: Specifies electrical and protocol requirements for ATA devices, relevant for both conventional and zoned storage.
- SCSI Standards (e.g., ZBC/ZAC for SCSI): Provides command sets for zoned block commands in SCSI environments, ensuring cross-technology consistency.
- ATA Implementation Standards: Additional documents in the ATA series covering device and host behaviors, architecture models, and protocol extensions.
Practical Value
Implementing ISO/IEC 17760-302:2025 empowers organizations to:
- Achieve seamless integration and management of zoned storage devices in modern IT environments.
- Enhance storage device utilization and performance through optimized zoning features.
- Simplify software development and system deployment cycles by adhering to a unified, internationally recognized command set.
- Future-proof storage infrastructure investments by complying with a standard that supports ongoing innovation and backward compatibility.
For full implementation details, refer to the official ISO/IEC documentation and related series publications.