![除了 dmesg 之外,USB 记忆棒在任何地方都看不到](https://linux22.com/image/94632/%E9%99%A4%E4%BA%86%20dmesg%20%E4%B9%8B%E5%A4%96%EF%BC%8CUSB%20%E8%AE%B0%E5%BF%86%E6%A3%92%E5%9C%A8%E4%BB%BB%E4%BD%95%E5%9C%B0%E6%96%B9%E9%83%BD%E7%9C%8B%E4%B8%8D%E5%88%B0.png)
我正在插入 USB 记忆棒,但并未安装并且有点不可见。
$ sudo lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 178.9G 0 disk
├─sda1 8:1 0 256M 0 part /boot
├─sda2 8:2 0 50G 0 part /
└─sda3 8:3 0 128.6G 0 part /home
$ dmesg
[159171.366480] usb 1-3: new high-speed USB device number 29 using xhci_hcd
$ ls -al /dev/sd*
brw-rw---- 1 root disk 8, 0 Sep 15 10:48 /dev/sda
brw-rw---- 1 root disk 8, 1 Sep 15 10:48 /dev/sda1
brw-rw---- 1 root disk 8, 2 Sep 15 10:48 /dev/sda2
brw-rw---- 1 root disk 8, 3 Sep 15 10:48 /dev/sda3
这是怎么回事?