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一、参考资料
rootOnNVMe
How to Boot from NVMe SSD?
仅两步，把JETSON XAVIER NX的系统移动到nvme硬盘上
NVIDIA JETSON XAVIER NX （二）设置M.2 Key M SSD为系统盘
二、总体步骤
2.1 安装nvme固态硬盘
2.2 Jetson NX刷机
参考Jeson TX2刷机教程：Jetson TX2刷机教程
连接USB，连接跳线（连接第二、第三个位置），Host上位机打开 SDKManager，安装 Jetson OS；
连接USB
连接跳线（连接第二、第三个位置）
安装 Jetson OS
2.3 拔掉跳线，重启NX（可进入Ubuntu系统）
2.4 设置nvme为系统盘
关键步骤，请见下文。
2.5 安装 Jetson SDK Components
Host上位机打开 SDKManager，安装 Jetson SDK Components；
三、关键步骤
3.1 设置硬盘格式
# 进入parted
sudo parted /dev/nvme0n1
#将磁盘设置为gpt格式
mklabel gpt
#将磁盘所有的容量设置为GPT格式
mkpart logical 0 -1
#查看分区结果
print
# 退出parted
quit
xjzk@ubuntu:/$ sudo parted /dev/nvme0n1
GNU Parted 3.2
Using /dev/nvme0n1
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
Warning: The existing disk label on /dev/nvme0n1 will be destroyed and all data
on this disk will be lost. Do you want to continue?
Yes/No? Yes
(parted) mkpart logical 0 -1
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? Ignore
(parted) print
Model: aigo NVMe SSD P2000 128GB (nvme)
Disk /dev/nvme0n1: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 128GB 128GB logical
(parted) quit
Information: You may need to update /etc/fstab.
3.2 查看分区
#查看分区
df -l
df -a
lsblk
3.3 创建分区
# 进入硬盘
sudo fdisk /dev/nvme0n1
# 查看帮助
Command (m for help): m
# 添加分区
Command (m for help): n
# 添加拓展分区
Select (default p): e
# 分区编号，Enter回车默认
Partition number (1-4, default 1):
# 分区首地址，Enter回车默认
First sector (2048-250069679, default 2048):
# 分区尾地址，Enter回车默认
Last sector, +sectors or +size{K,M,G,T,P} (2048-250069679, default 250069679):
# 打印分区
Command (m for help): p
# 保存修改
Command (m for help): w
xjzk@ubuntu:~$ sudo fdisk /dev/nvme0n1
Welcome to fdisk (util-linux 2.31.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): e
Partition number (1-4, default 1):
First sector (2048-250069679, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-250069679, default 250069679):
Created a new partition 1 of type 'Extended' and of size 119.2 GiB.
Command (m for help): p
Disk /dev/nvme0n1: 119.2 GiB, 128035676160 bytes, 250069680 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x09833de0
Device Boot Start End Sectors Size Id Type
/dev/nvme0n1p1 2048 250069679 250067632 119.2G 5 Extended
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.
3.4 格式化分区
sudo mke2fs -t ext4 /dev/nvme0n1p1 #格式化分区
xjzk@ubuntu:/$ sudo mke2fs -t ext4 /dev/nvme0n1p1
[sudo] password for xjzk:
mke2fs 1.44.1 (24-Mar-2018)
Discarding device blocks: done
Creating filesystem with 31258461 4k blocks and 7815168 inodes
Filesystem UUID: 83a62e34-6619-4ef4-b44f-5734f0af8b3f
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872
Allocating group tables: done
Writing inode tables: done
Creating journal (131072 blocks): done
Writing superblocks and filesystem accounting information: done
3.5 拷贝rootfs
将eMMC / SD卡的rootfs复制到SSD。
# 进入目录
cd rootOnNVMe
#执行复制脚本
./copy-rootfs-ssd.sh
xjzk@ubuntu:~/Desktop$ cd rootOnNVMe/
xjzk@ubuntu:~/Desktop/rootOnNVMe$ ./copy-rootfs-ssd.sh
5,092,410,373 90% 56.35MB/s 0:01:26 (xfr#109670, to-chk=0/166927)
3.6 设置rootfs
安装启动脚本：将rootfs设置为NVME。
# 将rootfs设置为NVME
./setup-service.sh
#重启
sudo reboot
xjzk@ubuntu:~/Desktop/rootOnNVMe$ ./setup-service.sh
[sudo] password for xjzk:
==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===
Authentication is required to reload the systemd state.
Authenticating as: xjzk,,, (xjzk)
Password:
==== AUTHENTICATION COMPLETE ===
Created symlink /etc/systemd/system/default.target.wants/setssdroot.service → /etc/systemd/system/setssdroot.service.
Service to set the rootfs to the SSD installed.
Make sure that you have copied the rootfs to SSD.
Reboot for changes to take effect.
3.7 查看是否成功
查看硬盘挂载点，/dev/nvme0n1p1 成功挂载到 / 挂载点上。
xjzk@ubuntu:~$ df -l
Filesystem 1K-blocks Used Available Use% Mounted on
none 3591204 0 3591204 0% /dev
tmpfs 3975892 40 3975852 1% /dev/shm
tmpfs 3975892 30388 3945504 1% /run
tmpfs 5120 4 5116 1% /run/lock
tmpfs 3975892 0 3975892 0% /sys/fs/cgroup
/dev/nvme0n1p1 122547172 14721792 101557304 13% /
tmpfs 795176 12 795164 1% /run/user/120
tmpfs 795176 140 795036 1% /run/user/1000
/dev/mmcblk0p1 14318640 5353472 8214784 40% /media/xjzk/d6876fc2-e036-47bb-b2f6-bfe96b226e2a
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