Created attachment 1116586 [details]
Screenshot zip file
Description of problem:
I have install two RHEL7.2 on one server .The grub has already contain two RHEL7.2 OS (first install the rhel72-1 OS then install the rhel72-2 OS).But when trying to boot from the rhel72-1 OS it will failed to boot up.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Use a bare machine to install the RHEL7.2 OS with below partation:
sda1 500M xfs /boot
sda2 7G lvm rhel-root xfs /
2G lvm rhel-swap swap
2.then use the same machine to install the second RHEL7.2 OS as below partation:
sda3 500M xfs /boot
sda5 7G lvm rhel00-root xfs /
3.waiting for the installation finished
4.select first install RHEL7.2 OS to boot
The solution is fix the grub list manual :
When see the grub high light the first RHEL7.2 OS then press "e" to edit it find the “root=/dev/dm-2”entry and then fix it into "root=/dev/mapper/rhel-root" then press "Ctrl+x" the first RHEL7.2 OS could boot normal.
I just wondering why the default grub doesn't work.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.