3.初期設定（Raspberry Pi)

　初期設定

１。MVMEの設定最適化

これを行わないとハングアップする可能性がある

2.

EEPROM更新

sudo rpi-eeprom-update

sudo rpi-eeprom-update -a

sudo reboot

sudo apt install rpi-eeprom

sudo rpi-eeprom-update

sudo rpi-eeprom-update -a

sudo reboot

ブート順序確認

vcgencmd bootloader_config

sudo -E rpi-eeprom-config --edit

[all]

BOOT_UART=1

BOOT_ORDER=0xf416

PCIE_PROBE=1

NET_INSTALL_AT_POWER_ON=0

にする

② NVMe が認識されているか確認

lsblk

NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS

loop0         7:0    0  42.9M  1 loop /snap/snapd/24787

loop1         7:1    0  41.6M  1 loop /snap/snapd/25939

nvme0n1     259:0    0 476.9G  0 disk 

├─nvme0n1p1 259:1    0   512M  0 part /boot/firmware

└─nvme0n1p2 259:2    0 476.4G  0 part /

lspci | grep -i nvme

0000:01:00.0 Non-Volatile memory controller: MAXIO Technology (Hangzhou) Ltd. NVMe SSD Controller MAP1202 (DRAM-less) (rev 01)

③ Ubuntu 側の最適化

sudo nano /etc/fstab

LABEL=writable  /       ext4    defaults        0       1

LABEL=system-boot       /boot/firmware  vfat    defaults        0       1

変更する

LABEL=writable  /  ext4  defaults,noatime,commit=60  0  1

LABEL=system-boot  /boot/firmware  vfat  defaults,noatime  0  0

書いた後

sudo update-initramfs -u

sudo reboot

再起動後確認

 mount | grep ' / '

で下記表示

/dev/nvme0n1p2 on / type ext4 (rw,noatime,commit=60)

I/O scheduler

cat /sys/block/nvme0n1/queue/scheduler

下記表示

[none] mq-deadline

swap（zram推奨）

 sudo apt install zram-tools

確認：

swapon --show

表示

NAME       TYPE      SIZE USED PRIO

/dev/zram0 partition 256M   0B  100

✔ initramfs 更新忘れ注意

fstab 変更後：

sudo update-initramfs -u

電源不足チェック

vcgencmd get_throttled

下記表示でOK

throttled=0x0

NVMEの状態確認

① NVMe が正しく認識されているか

lsblk

下記表示

NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS

loop0         7:0    0  42.9M  1 loop /snap/snapd/24787

loop1         7:1    0  41.6M  1 loop /snap/snapd/25939

zram0       252:0    0   256M  0 disk [SWAP]

nvme0n1     259:0    0 476.9G  0 disk 

├─nvme0n1p1 259:1    0   512M  0 part /boot/firmware

└─nvme0n1p2 259:2    0 476.4G  0 part /

lsblk -f

NAME FSTYPE FSVER LABEL       UUID                                 FSAVAIL FSUSE% MOUNTPOINTS

loop0

     squash 4.0                                                          0   100% /snap/snapd/24787

loop1

     squash 4.0                                                          0   100% /snap/snapd/25939

zram0

                                                                                  [SWAP]

nvme0n1

├─nvme0n1p1

│    vfat   FAT32 system-boot 8AA8-96C7                             321.7M    36% /boot/firmware

└─nvme0n1p2

     ext4   1.0   writable    9276ecfd-6dd5-4e22-9a91-2afafd0a53a3  447.5G     1% /

② PCIe / NVMe として認識されているか

lspci | grep -i nvme

0000:01:00.0 Non-Volatile memory controller: MAXIO Technology (Hangzhou) Ltd. NVMe SSD Controller MAP1202 (DRAM-less) (rev 01)

③ SMART（健康状態）確認【重要】

sudo apt install nvme-cli

SMARTログ

sudo nvme smart-log /dev/nvme0

Smart Log for NVME device:nvme0 namespace-id:ffffffff

critical_warning			: 0

temperature				: 35 °C (308 K)

available_spare				: 100%

available_spare_threshold		: 10%

percentage_used				: 0%

endurance group critical warning summary: 0

Data Units Read				: 15606 (7.99 GB)

Data Units Written			: 23998 (12.29 GB)

host_read_commands			: 352766

host_write_commands			: 327655

controller_busy_time			: 0

power_cycles				: 10

power_on_hours				: 0

unsafe_shutdowns			: 2

media_errors				: 0

num_err_log_entries			: 0

Warning Temperature Time		: 0

Critical Composite Temperature Time	: 0

Temperature Sensor 1           : 35 °C (308 K)

Temperature Sensor 2           : 39 °C (312 K)

Thermal Management T1 Trans Count	: 0

Thermal Management T2 Trans Count	: 0

Thermal Management T1 Total Time	: 0

Thermal Management T2 Total Time	: 0

⑦ I/O 状態（詰まり確認）

iostat -xm 1