我在 Ubuntu 20.04 LTS 中使用磁盘进行了格式化。我将一些文件复制到 ISO 文件目录中（没有制作可启动的 USB），弹出 USB，然后再次插入，但它不起作用...我不知道问题出在哪里，因为我等到每个文件都保存在内存中，现在我无法访问或使用磁盘格式化。命令 sudofdisk -l也不显示 USB。我唯一能看到 USB 的部分是来自 Ubuntu 的应用程序Disk，但我什么也做不了（附上一些截图）。
我尝试了几种解决方案来修复 USB，但都没有效果。这里的步骤不起作用，因为我收到下一个错误：
jairom:~$ sudo parted -a none /dev/sdb mkpart primary fat32 0 32768
Error: Error opening /dev/sdb: No medium found
更新：输出sudo mount -l
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,noexec,relatime,size=6057000k,nr_inodes=1514250,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,noexec,relatime,size=1217028k,mode=755)
/dev/sda2 on / type ext4 (rw,relatime,errors=remount-ro)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup2 on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
none on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,nosuid,nodev,noexec,relatime,rdma)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=28,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=15042)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
tracefs on /sys/kernel/tracing type tracefs (rw,nosuid,nodev,noexec,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
/var/lib/snapd/snaps/skype_128.snap on /snap/skype/128 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/snap-store_433.snap on /snap/snap-store/433 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/vlc_1397.snap on /snap/vlc/1397 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gimp_252.snap on /snap/gimp/252 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/postman_107.snap on /snap/postman/107 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/code_32.snap on /snap/code/32 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/audacity_648.snap on /snap/audacity/648 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/drawio_29.snap on /snap/drawio/29 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-34-1804_33.snap on /snap/gnome-3-34-1804/33 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/kdenlive_24.snap on /snap/kdenlive/24 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core_9066.snap on /snap/core/9066 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/skype_123.snap on /snap/skype/123 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/intellij-idea-community_216.snap on /snap/intellij-idea-community/216 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk-common-themes_1506.snap on /snap/gtk-common-themes/1506 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/octave_29.snap on /snap/octave/29 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/postman_108.snap on /snap/postman/108 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/code_33.snap on /snap/code/33 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/libreoffice_177.snap on /snap/libreoffice/177 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-28-1804_116.snap on /snap/gnome-3-28-1804/116 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_1754.snap on /snap/core18/1754 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/snapd_7264.snap on /snap/snapd/7264 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/kde-frameworks-5-qt-5-14-core18_4.snap on /snap/kde-frameworks-5-qt-5-14-core18/4 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core18_1705.snap on /snap/core18/1705 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/drawio_28.snap on /snap/drawio/28 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/vlc_1620.snap on /snap/vlc/1620 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/intellij-idea-community_227.snap on /snap/intellij-idea-community/227 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gtk2-common-themes_9.snap on /snap/gtk2-common-themes/9 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/gnome-3-34-1804_27.snap on /snap/gnome-3-34-1804/27 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/canonical-livepatch_95.snap on /snap/canonical-livepatch/95 type squashfs (ro,nodev,relatime,x-gdu.hide)
/dev/sda4 on /media/jairom/data type ext4 (rw,nosuid,nodev,relatime,x-gvfs-show) [data]
/dev/sda1 on /boot/efi type vfat (rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
tmpfs on /run/snapd/ns type tmpfs (rw,nosuid,nodev,noexec,relatime,size=1217028k,mode=755)
nsfs on /run/snapd/ns/canonical-livepatch.mnt type nsfs (rw)
vmware-vmblock on /run/vmblock-fuse type fuse.vmware-vmblock (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=1217024k,mode=700,uid=1000,gid=1000)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
/dev/fuse on /run/user/1000/doc type fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
nsfs on /run/snapd/ns/snap-store.mnt type nsfs (rw)
有解决办法吗？我真的不明白问题出在哪里，似乎我的电脑不能很好地拒绝 USB，但我从来没有遇到过这种情况。
答案1
您可以尝试使用 GParted。它会弹出吗？请注意，您必须选择右上角的驱动器。默认驱动器是您的硬盘驱动器。