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partedsudo 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partedquit

xjzk@ubuntu:/$ sudo parted /dev/nvme0n1GNU Parted 3.2Using /dev/nvme0n1Welcome to GNU Parted! Type 'help' to view a list of commands.(parted) mklabel gptWarning: The existing disk label on /dev/nvme0n1 will be destroyed and all dataon this disk will be lost. Do you want to continue?Yes/No? Yes(parted) mkpart logical 0 -1Warning: The resulting partition is not properly aligned for best performance.Ignore/Cancel? Ignore(parted) printModel: aigo NVMe SSD P2000 128GB (nvme)Disk /dev/nvme0n1: 128GBSector size (logical/physical): 512B/512BPartition Table: gptDisk Flags:Number  Start   End    Size   File system  Name     Flags 1      17.4kB  128GB  128GB logical  (parted) quitInformation: You may need to update /etc/fstab.

3.2 查看分区

#查看分区df -ldf -alsblk

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/nvme0n1Welcome 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): nPartition type   p   primary (0 primary, 0 extended, 4 free)   e   extended (container for logical partitions)Select (default p): ePartition 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): pDisk /dev/nvme0n1: 119.2 GiB, 128035676160 bytes, 250069680 sectorsUnits: sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisklabel type: dosDisk identifier: 0x09833de0Device  Boot StartEnd   Sectors   Size Id Type/dev/nvme0n1p12048 250069679 250067632 119.2G  5 ExtendedCommand (m for help): wThe 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: doneCreating filesystem with 31258461 4k blocks and 7815168 inodesFilesystem UUID: 83a62e34-6619-4ef4-b44f-5734f0af8b3fSuperblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872Allocating group tables: doneWriting inode tables: doneCreating journal (131072 blocks): doneWriting 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 -lFilesystem     1K-blocks     Used Available Use% Mounted onnone      3591204 0   3591204   0% /devtmpfs     397589240   3975852   1% /dev/shmtmpfs     3975892    30388   3945504   1% /runtmpfs 5120 4      5116   1% /run/locktmpfs     3975892 0   3975892   0% /sys/fs/cgroup/dev/nvme0n1p1 122547172 14721792 101557304  13% /tmpfs      79517612    795164   1% /run/user/120tmpfs      795176      140    795036   1% /run/user/1000/dev/mmcblk0p1  14318640  5353472   8214784  40% /media/xjzk/d6876fc2-e036-47bb-b2f6-bfe96b226e2a