树莓派4B

1.查看磁盘状态

其中 /dev/mmcblk0为系统所在的SD卡、/dev/sda1为U盘：

pi@raspberrypi:~ $ sudo fdisk -l
Disk /dev/mmcblk0: 14.9 GiB, 15931539456 bytes, 31116288 sectors
...
Disk /dev/sda: 14.4 GiB, 15483273216 bytes, 30240768 sectors
Disk model: DataTraveler 2.0
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: gpt
Disk identifier: 55905CF3-5015-4E1B-BF7A-4E45335496D5

Device     Start      End  Sectors  Size Type
/dev/sda1   2048 30240734 30238687 14.4G Microsoft basic data

2.格式化U盘

pi@raspberrypi:~ $ sudo mkfs.vfat -F 32 /dev/sda1
mkfs.fat 4.1 (2017-01-24)
pi@raspberrypi:~ $ sudo mkfs.ext4 /dev/sda1
mke2fs 1.44.5 (15-Dec-2018)
Creating filesystem with 3779835 4k blocks and 946560 inodes
Filesystem UUID: 2c022a69-ee6d-4a22-a115-11a72f7ff640
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information:
done

3.U盘的挂载与卸载

## 创建挂载点
sudo mkdir /data

## 挂载U盘
sudo mount /dev/sda1 /data

## 查看挂载情况
pi@raspberrypi:~ $ df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/root      ext4       15G  6.0G  7.8G  44% /
/dev/sda1      ext4       15G   41M   14G   1% /data

## 卸载U盘
sudo umount /dev/sda1