1.插入U盘,发现原来的U盘由4G变成2G
2.原因:可能以前做linux系统启动盘时有一部分被隐藏了。
3.用sudo fdisk -l查看
在终端,进入root下,输入:
sudo fdisk -l
得到信息:
Disk /dev/nvme0n1: 477 GiB, 512110190592 bytes, 1000215216 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: gpt
Disk identifier: 97F2F764-52AA-48DC-8E17-D5B217C1ACAA
Device Start End Sectors Size Type
/dev/nvme0n1p1 2048 616447 614400 300M EFI System
/dev/nvme0n1p2 616448 23685119 23068672 11G Linux swap
/dev/nvme0n1p3 23685120 218990591 195305472 93.1G Linux filesystem
/dev/nvme0n1p4 218990592 609601535 390610944 186.3G Linux filesystem
/dev/nvme0n1p5 609601536 1000212479 390610944 186.3G Linux filesystem
Disk /dev/sda: 3.8 GiB, 4009754624 bytes, 7831552 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: 0xac3bc589
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2469888 7045119 4575232 2.2G 7 HPFS/NTFS/exFAT
/dev/sda4 7045120 7831551 786432 384M ef EFI (FAT-12/16/32)
root@xgj-PC:~#
4. 手动将挂在的U盘分区卸载:
umount /dev/sda
umount /dev/sda1
5.一切准备就绪,就开始格式化U盘吧
mkfs.vfat -I /dev/sda
mkfs.vfat -I /dev/sda1
6.成功。4G的u盘回来了。
7.用df查看:
文件系统 1K-块 已用 可用 已用% 挂载点
udev 3925252 0 3925252 0% /dev
8.用sudo fdisk -l查看
Disk /dev/sda: 3.8 GiB, 4009754624 bytes, 7831552 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: 0x00000000
9.用图形桌面查看:Deepin-Linux的系统: