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I have been trying to install CentOS 7 on a computer with no success so far.

I am able to boot the live USB media, but the problem is the CentOS installation referring the HDD always as /dev/sdb. No matter what I do, the live media is always detected as /dev/sda and the HDD as /dev/sdb. CentOS install properly on the HDD, but when I try to boot from the HDD, without the live USB media, the HDD becomes /dev/sda. The system complains about being unable to find /dev/sdbN partitions.

I do not have the possibility to burn a CD/DVD and loading the image from an optical disk reader.

I have tried with three different USB thumbs, I have created the image by two different methods, the dd one as well as using unetbootin. I have messed with all the possible BIOS options related to USB, but I am still unable to get my computer running CentOS 7.

  • The problem seems to be related to the udev rules in order to reference the devices: stackoverflow.com/a/18423187/176974 May be the live version and the installed version do not use the same rules, thus the different references for the same disk unit. – jap1968 Sep 28 '14 at 9:42
  • Can't you edit the bootloader entry temporarily to boot from /dev/sda, then boot and change it permanently through the OS? – axil Sep 30 '14 at 9:13

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