====== FreeBSDのnvmecontrolコマンドを色々試してみる ======
FreeBSDでNVMeデバイスを操作するnvmecontrolコマンドは、2020-10-17現在ドキュメントが不完全な状態で、
===== 試した環境 =====
* FreeBSD 12.1-RELEASE-p3
===== コマンド =====
==== devlist ====
NVMeデバイス一覧を表示。デバイスだけではなく名前空間も表示されるようだ。
# nvmecontrol devlist
nvme0: SAMSUNG MZQLB960HAJR-00007
nvme0ns1 (915715MB)
nvme1: SAMSUNG MZQLB960HAJR-00007
nvme1ns1 (915715MB)
==== identify ====
指定NVMeデバイスの詳細表示。
NVMeデバイスを指定した場合はIDENTIFY_CONTROLLERの、名前空間を指定した場合はIDENTIFY_NAMESPACEのデータを人間が読める形で表示する。
-xオプションで各データの先頭1024バイトの16進ダンプを表示、-vを付けると4096バイト（全ダンプ？）になる。
# nvmecontrol identify nvme1
Controller Capabilities/Features
================================
Vendor ID: 144d
Subsystem Vendor ID: 144d
Serial Number: S437NY0KC00562
Model Number: SAMSUNG MZQLB960HAJR-00007
Firmware Version: EDA5202Q
Recommended Arb Burst: 2
IEEE OUI Identifier: 38 25 00
Multi-Path I/O Capabilities: Not Supported
Max Data Transfer Size: 2097152 bytes
Controller ID: 0x0004
Version: 1.2.0
Admin Command Set Attributes
============================
Security Send/Receive: Supported
Format NVM: Supported
Firmware Activate/Download: Supported
Namespace Managment: Supported
Device Self-test: Not Supported
Directives: Not Supported
NVMe-MI Send/Receive: Not Supported
Virtualization Management: Not Supported
Doorbell Buffer Config: Not Supported
Get LBA Status: Not Supported
Sanitize: Not Supported
Abort Command Limit: 8
Async Event Request Limit: 4
Number of Firmware Slots: 3
Firmware Slot 1 Read-Only: Yes
Per-Namespace SMART Log: Yes
Error Log Page Entries: 64
Number of Power States: 1
Total NVM Capacity: 960197124096 bytes
Unallocated NVM Capacity: 0 bytes
NVM Command Set Attributes
==========================
Submission Queue Entry Size
Max: 64
Min: 64
Completion Queue Entry Size
Max: 16
Min: 16
Number of Namespaces: 1
Compare Command: Supported
Write Uncorrectable Command: Supported
Dataset Management Command: Supported
Write Zeroes Command: Supported
Save Features: Supported
Reservations: Not Supported
Timestamp feature: Not Supported
Verify feature: Not Supported
Fused Operation Support: Not Supported
Format NVM Attributes: Crypto Erase, Per-NS Erase, Per-NS Format
Volatile Write Cache: Not Present
# nvmecontrol identify -v nvme1
Controller Capabilities/Features
================================
Vendor ID: 144d
Subsystem Vendor ID: 144d
Serial Number: S437NY0KC00562
Model Number: SAMSUNG MZQLB960HAJR-00007
Firmware Version: EDA5202Q
Recommended Arb Burst: 2
IEEE OUI Identifier: 38 25 00
Multi-Path I/O Capabilities: Not Supported
Max Data Transfer Size: 2097152 bytes
Controller ID: 0x0004
Version: 1.2.0
Admin Command Set Attributes
============================
Security Send/Receive: Supported
Format NVM: Supported
Firmware Activate/Download: Supported
Namespace Managment: Supported
Device Self-test: Not Supported
Directives: Not Supported
NVMe-MI Send/Receive: Not Supported
Virtualization Management: Not Supported
Doorbell Buffer Config: Not Supported
Get LBA Status: Not Supported
Sanitize: Not Supported
Abort Command Limit: 8
Async Event Request Limit: 4
Number of Firmware Slots: 3
Firmware Slot 1 Read-Only: Yes
Per-Namespace SMART Log: Yes
Error Log Page Entries: 64
Number of Power States: 1
Total NVM Capacity: 960197124096 bytes
Unallocated NVM Capacity: 0 bytes
NVM Command Set Attributes
==========================
Submission Queue Entry Size
Max: 64
Min: 64
Completion Queue Entry Size
Max: 16
Min: 16
Number of Namespaces: 1
Compare Command: Supported
Write Uncorrectable Command: Supported
Dataset Management Command: Supported
Write Zeroes Command: Supported
Save Features: Supported
Reservations: Not Supported
Timestamp feature: Not Supported
Verify feature: Not Supported
Fused Operation Support: Not Supported
Format NVM Attributes: Crypto Erase, Per-NS Erase, Per-NS Format
Volatile Write Cache: Not Present
名前空間を指定したパターン。
# nvmecontrol identify nvme1ns1
パスワード:
Size: 234423126 blocks
Capacity: 234423126 blocks
Utilization: 49172754 blocks
Thin Provisioning: Not Supported
Number of LBA Formats: 2
Current LBA Format: LBA Format #01
Data Protection Caps: Not Supported
Data Protection Settings: Not Enabled
Multi-Path I/O Capabilities: Not Supported
Reservation Capabilities: Not Supported
Format Progress Indicator: 0% remains
Deallocate Logical Block: Read Not Reported
Optimal I/O Boundary: 0 blocks
NVM Capacity: 960197124096 bytes
Globally Unique Identifier: 343337304bc005620025385900000001
IEEE EUI64: 0000000000000000
LBA Format #00: Data Size: 512 Metadata Size: 0 Performance: Best
LBA Format #01: Data Size: 4096 Metadata Size: 0 Performance: Best
====== ns ======
NVMe namespaceに関する操作。
===== ns active =====
NVMeデバイスの有効な名前空間を一覧表示する。
# nvmecontrol ns active nvme1
Active namespaces:
1
===== ns controllers =====
NVMシステム内のコントローラを一覧表示する。
# nvmecontrol ns controllers nvme1
NVM subsystem includes 1 controller(s):
0x0004
===== ns delete =====
指定のNVMe namespaceを削除する。
-nには名前空間ID (nvmecontrol nsidで取得した数値）を指定する。
# nvmecontrol ns delete -n 1 nvme1
namespace 1 deleted
===== ns identify =====
指定コントローラ、名前空間IDの名前空間の詳細を表示する。nvmecontrol identifyに名前空間デバイスを指定したものと等価。
# nvmecontrol ns identify -n 1 nvme1
====== nsid ======
指定名前空間デバイスからコントローラと名前空間IDを取得する。
# nvmecontrol nsid nvme1ns1
nvme1 1