Major References

1. NVM Express Base Specification 2.0.pdf
   • Sometimes, NVMe 1.4 spec say more information (e.g. Block Erase property)
   • Some data structure & field only show in Command Set Spec
2. NVM Command Set Specification 1.0c.pdf **<=**Detail command result field information
   1. chrome-extension://pnhplgjpclknigjpccbcnmicgcieojbh/pdf/viewer.html?file=https://nvmexpress.org/wp-content/uploads/NVM-Express-NVM-Command-Set-Specification-1.0c-2022.10.03-Ratified.pdf
3. https://nvmexpress.org/resource/nvme-namespaces/

• Refer to [5]

Spec Important Section Index

• Doc: NVMe Spec 2.0
• Doc: NVMe Command Set Spec

Spec Note

• 基本知識
• Architecture - Subsystem → Domain → Endurance Group → NVMe Set → Namespace
• NVMe Subsystem - all components within a non-valatile memory /
• Controller capability: Ready timeout
• Features - e.g. WriteCache
  • Feature Support (set-feature) - namespace metadata …
  • 每個 feature 不一定支援 saveable (controller reset & power loss保留)
  • Get nvme get-feature / 查看是否 saveable
  • Set
• 取得整個 drive 的 size
• Name space
• NS Reservation - PTPL / Host identifier (Host ID)
• Deallcate (ie.g. TRIM)
• NVM Set - 將實體 flush 分成 & 更有效分配 IO (Predictable Latency Mode for IO Determinism)