Linux 7.0 u disk PE installed a problem easy to encounter

When we use a U disk to make (I use REDHAT7.0 and SENTOS7.0) PE disk to the computer installed Linux system, often choose to install the text interface until three "OK" will be stuck after a long time, waiting for a long time will appear similar to

Warning:could not Boot

Warning:/dev/root does not exist

.....

Such an error message will then appear

dracut:/#

Such a command line, at this point only need to enter the following actions

dracut:/# cd/dev/

dracut:/dev# ls

Then you'll find a bunch of strings, and we'll need to filter out the names with the SDA SDB VDB VDC, such as strings, for example: If you find a sdb,sdb1,sdb2,sdb5,sdb6,sda,sda1, Such a string then we just need to remember sda1, because SDB followed by 1 2 5 6, that is, the SDB device has 4 partitions, obviously, this is our computer's hard disk device, and we use the USB stick itself contains only one device information, that is sda1, of course, the device name will be different, But basically is SD,VD, so, you just know which behind only with 1 this number, and do not contain other numbers that is we need the U disk device!

Perhaps you would ask: what's the use of this? How is it going to help me? Don't worry, remember your USB device number, the following is useful

Restart the computer, again into the text selection installation interface, at this time you can press the TAB key according to the system prompt (also some E key, note the message), the following statement

Vmlinuz initrd=initrd.img inst.stage2=hd:label=rhel-7.0\x20server.x86_64 Rd.live.check quiet

Revision changed to

Vmlinuz initrd=initrd.img inst.stage2=hd:/dev/sda1 Quiet

At this time the above sda1 is the device information previously seen on the USB stick, depending on the difference may be sdb1 and so on

At this point, our installation information will refer to the U disk, then press ENTER ENTER key can be installed properly (some systems need to press ctrl+x instead of ENTER, note the information)

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Linux 7.0 u disk PE installed a problem easy to encounter