Features and Log pages

Feature 는 SSD 의 설정값을 지칭한다. Set Feature command를 통해 해당 설정값을 쓸 수 있고, Get Feature command를 통해 해당 설정 값을 읽어 올 수 있다. 

 

NVMe 2.0 Spec. 기준으로 Feature Identifiers (FIDs)

No.	Feature Identifier	Feature Name
1	01h	Arbitration
2	02h	Power Management
3	04h	Temperature Thgreshold
4	06h	Volatile Write Cache
5	07h	Number of Queues
6	08h	Interrupt Coalescing
7	09h	Interrupt Vector Configuration
8	0Bh	Asynchronous Event Configuration
9	0Ch	Autonomous Power State Transition
10	0Dh	Host Memory Buffer
11	0Eh	Timestamp
12	0Fh	Keep Alive Timer
13	10h	Host Controllred Thermal Management
14	11h	Non-Operational Power State Config
15	12h	Read Recovery Level Config
16	13h	Predictable Latency Mode Config
17	14h	Predictable Latency Mode Window
18	16h	Host Behavior Support
19	17h	Sanitize Config
20	18h	Endurance Group Event Configuration
21	19h	I/O Command Set Profile
22	1Ah	Spinup Control
23	7Dh	Enhanced Controller Metadata
24	7Eh	Controller Metadata
25	7Fh	Namespace Metadata
26	80h	Software Progress Marker
27	81h	Host Identifier
28	82h	Reservation Notification Mask
29	83h	Reservation Persistence
30	84h	Namespace Write Protection Config
31	C0h to FFh	Vendor Specific

 

Log page 는 SSD 내부의 log 들을 가리킨다. Get Log Page command를 사용해서, 다양한 종류의 로그들을 가져올 수 있다.

 

NVMe 2.0 Spec. 기준으로 Log Identifiers (LIDs)

No.	Log Identifier	Scope	Log Page Name
1	00h	Controller	Supported Log Page
2	01h	Controller	Error Infomation
3	02h	Controller / Namespace	SMART / Helth Information
4	03h	Domain / NVM subsystem	Firmware Slot Information
5	04h	Controller	Changed Namespace List
6	05h	Controller	Commands Supported and Effects
7	06h	Controller /  Domain / NVM subsystem	Device Self-test
8	07h	Vendor Specfic	Telemetry Host-Initiated
9	08h	Vendor Specfic	Telemetry Controller-Initiated
10	09h	Domain / NVM subsystem	Endurance Group Infomation
11	0Ah	Domain / NVM subsystem	Predicatable Latency Per NVM Set
12	0Bh	Domain / NVM subsystem	Predicatable Latency Event Aggregate
13	0Ch	Controller	Asymmetric(비대칭적) Namespace Access
14	0Dh	NVM subsystem	Persistent Event Log
15	0Fh	Domain / NVM subsystem	Endurance Group Event Aggregate(전체적인)
16	10h	Domain / NVM subsystem	Media Unit Status
17	11h	Domain / NVM subsystem	Supported Capacity Configuration List
18	12h	Controller	Feature Identifiers Supported and Effects
19	13h	Controller	NVMe-MI Commands Supported and Effects
20	14h	NVM subsystem	SCommand and Feature Lockdown
21	15h	Controller	Boot Partition
22	16h	Endurance Group	Rotational Media Infomation
23	70h		Discovery
24	80h	Controller	Reservation Notification
25	81h	NVM subsystem	Sanitize Status
26	82h to BEh		I/O Command Set Specific
27	BFh		Zoned Namespace Command Set
28	C0h to FFh		Vendor specific

Controller/NVM subsystem/Domain 과 같은 architecture 에 대하여 살펴보길 원하신다면, 아래 link를 참조하시기 바랍니다.

https://pcieblog.tistory.com/52

NVM Express Architecture