JEDEC JESD231-2022 UFS FBO扩展版：优化文件存储标准

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JEDEC JESD231-2022 Universal Flash Storage (UFS) 是一个行业标准，由固态技术协会（JEDEC）制定，用于规范闪存存储器的通用接口和性能。该标准于2022年8月更新，发布了File-Based Optimizations (FBO) 扩展版本1.0。FBO是一个关键特性，它专注于优化文件系统级别的操作，旨在提高数据传输效率、提升存储性能和兼容性。在JEDEC JESD231中，FBO的目标是通过标准化文件操作的方式来简化设备间的交互，确保不同厂商生产的UFS设备在处理文件时能够实现一致的性能表现。这包括改进数据块的管理、减少元数据开销、支持更快的数据访问和缓存策略，从而提升随机读写速度，特别是对于大量小文件的处理，这是现代移动设备和物联网设备中常见的场景。 FBO扩展版本1.0可能包含以下关键内容： 1. **协议增强**：对UFS协议进行扩展，以便更好地支持文件系统级的I/O操作，如文件的创建、打开、读取、写入、删除等，以及元数据的高效管理。 2. **数据压缩与解压缩**：允许在读取或写入文件时实现数据压缩，减少存储空间占用，同时在解压缩阶段提供性能优化。 3. **数据缓存策略**：更新了缓存策略，以利用设备的高速缓存来加速文件访问，减少主内存的负载，并优化数据一致性。 4. **异步操作支持**：允许设备在后台执行文件操作，提升用户体验，尤其是在执行长时间运行的文件操作时。 5. **错误检测与纠正**：增强错误检测和纠正机制，以确保数据在传输过程中的完整性，这对于数据安全至关重要。 6. **兼容性保障**：通过标准化FBO功能，确保所有符合JESD231-2022标准的UFS设备能在不同应用场景下互换使用，降低部署复杂性。 7. **性能指标定义**：明确了FBO性能指标，如文件系统吞吐量、延迟和一致性水平，帮助用户评估和选择合适的存储解决方案。 8. **专利声明**：JEDEC作为标准制定者，不保证其采纳的标准不会涉及专利问题，但明确表示通过采用标准，各方都不承担专利侵权责任。 JEDEC JESD231-2022 UFS FBO扩展版1.0是针对现代闪存存储需求而制定的重要标准，旨在提升数据存储和访问效率，为设备制造商和消费者提供了清晰的技术指导，推动了行业技术创新和产品的互通性。

JEDEC Standard No. xxx 
 
 
-i- 
UFS HOST FILE BASED OPTIMIZATION (FBO) EXTENSION, VERSION 1.0 
 
CONTENTS 
 
Contents  .......................................................................................................................................................................... i 
Figures   .......................................................................................................................................................................... i 
Tables   .......................................................................................................................................................................... i 
1  Scope ............................................................................................................................................................... 1 
2  Normative Reference ....................................................................................................................................... 1 
3  Terms, and definitions ..................................................................................................................................... 1 
3.1  Acronyms ......................................................................................................................................... 1 
3.2  Terms and definitions ...................................................................................................................... 2 
3.3  Keywords ......................................................................................................................................... 2 
3.4  Abbreviations ................................................................................................................................... 3 
3.5  Conventions ..................................................................................................................................... 3 
4  Introduction ..................................................................................................................................................... 4 
4.1  Overview .......................................................................................................................................... 4 
5  File Based Optimization (FBO) description .................................................................................................... 5 
5.1  Overall FBO behavior ...................................................................................................................... 5 
5.1.1  Controlling FBO Operations ............................................................................................................ 7 
6  FBO Buffers .................................................................................................................................................... 8 
6.1  FBOWriteBuffer .............................................................................................................................. 8 
6.1.1  Access to FBOWriteBuffer .............................................................................................................. 8 
6.1.2  FBOWriteBuffer Generic Structure ................................................................................................. 8 
6.1.3  FBOWriteBuffer Type Specific Informaiton Structure for FBO Type = 0x0 ................................. 9 
6.2  FBOReadBuffer ............................................................................................................................. 11 
6.2.1  Access to FBOReadBuffer ............................................................................................................. 11 
6.2.2  FBOReadBuffer Generic Structure ................................................................................................ 11 
6.2.3  FBOReadBuffer Type Specific Informaiton Structure for FBO Type = 0x0 ................................ 12 
7  Descriptors, Flags and Attributes .................................................................................................................. 14 
7.1  UFS Descriptors ............................................................................................................................. 14 
7.2  Device Descriptor for FBO ............................................................................................................ 15 
7.3  File Based Optimization (FBO) Descriptor ................................................................................... 15 
7.4  Flags ............................................................................................................................................... 16 
7.5  Attributes ....................................................................................................................................... 17 
 
FIGURES 
Figure 5-1 — FBO Analysis Flow ................................................................................................................ 5 
Figure 5-2 — FBO Optimization Flow ......................................................................................................... 6 
Figure 5-3 — FBO Flow state machine ........................................................................................................ 7 
 
TABLES 
Table 6.1 — FBOWriteBuffer General Structure ......................................................................................... 8 
Table 6.2 — FBOWriteBuffer Type Specific Informaiton Structure FBO Type = 0x0 ............................... 9 
Table 6.3 — FBOReadBuffer Type Specific Informaiton Structure FBO Type = 0x0 .............................. 12 
Table 7.1 — Descriptor identification values ............................................................................................. 14 
Table 7.2 — Device Descriptor for FBO .................................................................................................... 15 
Table 7.3 — 1.1 File Based Optimization (FBO) Descriptor ..................................................................... 15 
   
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