A simple solution for problems related to dracut when centos7.1 is installed on a USB flash drive

A simple solution for problems related to dracut when centos7.1 is installed on a USB flash drive

Today, I was free, so I took the time to recall what kind of pitfall I encountered when I installed the Nanjing specialty CENTOS7 on a USB flash drive.

When the USB flash drive system became used to it, the Chinese cabbage tool was used to engrave a CentOS 7.1 minimun ISO image to the USB flash drive. This started with a nightmare.

If someone, like me, thinks it should be done after the plug-in disk is installed just like WINDOWS, a lot of errors related to dracut will be reported, and after a few minutes, the figure # Behind dracut is like this:

The following solutions are available on the Internet:

1) In command mode, check which sdaXX devices are available under/dev, and change the repo = hd:/dev/sdb1 of the startup command one by one. I tried four devices, not yet. I have vomited blood. Give up!
2) how to display the Mount list in vmlinuz initrd!

After four hours of hard work, I was nearly desperate. When I was trying to install the last dial on the CD, I suddenly felt strange that the original default command did not specify a device. How can I install it? Then, let's take a look:

In the installation menu, select Install CentOSLinux7 and then press e to modify it. (If the disc is installed by tab, This is a pitfall)

When you see inst. stage2 = hd: LABEL = CentOS \ x207 \ x20x86_64, you can see it! It turns out to be installed according to the device LABEL!

This name is a transcoding identifier, that is, find a device labeled as "CentOS 7 x86_64", and then look at the LABEL of the USB flash drive: cabbage USB flash drive! Tian Sha's tool has changed the LABEL! Therefore, you can directly change the USB flash drive to CentOS 7 x86_64, insert it, restart it, and select installation. The installation graphic interface is displayed immediately.

To sum up one sentence: to install CentOS7 on a USB flash drive, ensure that the volume is marked as "CentOS 7 x86_64 "! If not, modify the volume label! This is simple, and the system will automatically find it. Otherwise, SDA will try it one by one. Unless it is a new hard disk, it will cause you to vomit blood!