Unable to install RHEL From boot usb made using dd command

Latest response

Hi All,

I have been trying to install RHEL for a while now using the dd command as instructed on the "getting started" guide, and the process went well and all files seems to be in order when i look at them from within Centos 7.

However when I try to boot it from drive It fails to load up the install screen and I can't understand why..

Any insights will be appreciated.

OS
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Responses

SM Guru 3731 points
13 August 2018 11:17 AM

Does that mean you've mirrored disks using "dd" command, and now trying to boot another system using mirrored disk made earlier? Also, let us know at what stage of booting it has failed. You may attach any pictures of the screen where it is stuck or failed. In such process, when you clone a disk using "dd" command, you would need make sure the platform from where it was built should have persistent device names only such as, using UUID instead of device name in '/etc/fstab'. etc., So, please share more details about how the disk to disk mirroring is done and attach any pictures....

Christian Labisch's picture Guru 9715 points
13 August 2018 11:34 AM

Hi Sadashiva,

I think Ofir is talking about a fresh installation and has a problem with the "quality" of his installation medium. :)

Regards,
Christian

SM Guru 3731 points
13 August 2018 12:40 PM

Yes Christian, could be. His statement is not clear enough.

Christian Labisch's picture Guru 9715 points
13 August 2018 11:23 AM

Hi Ofir,

Creating an installation medium with dd often fails, did you set a boot flag on the USB drive ? I suggest something different :
On your CentOS system open GNOME Disks and select Restore Disk Image from the menu on the top right of the application.
Choose the Red Hat Linux Enterprise installation ISO file and the USB drive (on the left) to write it to - then start restoring. :)

Regards,
Christian

Christian Labisch's picture Guru 9715 points
13 August 2018 11:59 AM

Hi Ofir,

The method using GNOME Disks I've described is proven to work perfectly and the installation medium should boot properly.
In case it is "hanging" during the loading process of the Anaconda installer - this could be due to a hardware incompatibility.
It can occur on machines with NVIDIA graphics adapters - which often have a compatibility issue with the nouveau drivers.

The following instructions are only valid if you are having such a machine with a NVIDIA graphics adapter of course ... :)
As a workaround add nouveau.modeset=0 to the boot parameters at the end of the line which is starting with "linux".
After booting from the USB drive mark the entry "Install RHEL", press the E key and after adding the parameter Ctrl+X.

Regards,
Christian

OS Community Member 41 points
13 August 2018 2:15 PM

Hi Christian, Sadashiva, As for the issue I have encountered, let me specify in a more specified matter.

I tried to follow the Products & ServicesRed -->Red Hat Enterprise Linux "create bootable USB media" guide step by step in order to create a usb Drive with RHEL 7.5 install.

I used the dd command as such : sudo dd if=blabla/path/blabla/file.iso of=/dev/sdb1 It did copy the instructed ISO file however did not load at booting menu.

After some research in Centos forums (as this is my current operating system) I later noticed that I was using the command in the wrong matter. " of=/dev/sdb1 " was the cause for the mess, the proper way to copy the ISO file was as such " of=/dev/sdb "(## no 1 after the drives name) as The file should have been copied to the whole drive not just a partition sdb1.

The USB bootable drive is now starting install at boot. Thanks a lot for the insights and assistance !

Kind regards, Ofir

Christian Labisch's picture Guru 9715 points
13 August 2018 2:29 PM

Hi Ofir,

You're welcome ! I'm glad that you could solve the problem. Thanks for your feedback information. Enjoy RHEL ... :)

Regards,
Christian

SM Guru 3731 points
13 August 2018 3:52 PM

That is nice.

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