On Wed, November 5, 2014 19:41, Richard wrote:
------------ Original Message ------------
Date: Wednesday, November 05, 2014 15:53:53 -0500 From: "James B. Byrne" byrnejb@harte-lyne.ca To: centos@centos.org Subject: [CentOS] CentOS-7 re-install
I have booted the system from a live cd. I am looking at a 1.1GB volume that I presume is the /boot partition I created in the installer. Inside I see this:
config-3.10.0-123.el.x86_64 /grub /grub2 initramfs-0-rescue-[md5. . .].img initramfs-3.10.0-123.el.x86_64 initrd-plymouth.img symvers-3.10.0-123.el.x86_64 System-map-3.10.0-123.el.x86_64 vmlinuz-0-rescue-[md5 as above] vmlinuz-3.10.0-123.el.x86_64
/grub contains: splash.xpm.gz
/grub2 contains: /themes
/grub2/themes contains: /system
/grub2/themes/system contains:
nothing at all
So, what does CentOS-7 boot from? I take it that this is not normal? So where are the boot configuration files? Note, that I have only been working on this system through the GUI and I I did was install, update, played around with Gnome3, installed KDE, shutdown and re-installed over the original.
So, whatever happened it is not because of anything one can only screw up from the cli. Since the re-install I have not been able to boot from the HDD. Seeing as there are no boot configuration files I can see why booting is a problem. But, how does the installer operate such that these critical files were not provided?
The /boot/grub2 directory should have the files:
device.map grub.cfg grubenvThe grub.cfg looks kind of like grub/grub.conf and can be generated using grub2-mkconfig (based on the files in /etc/grub.d and /etc/default/grub).
If you booted from a live cd I suspect that the full boot setup isn't completed on the installed system, which would be why you don't seem to be seeing the grub2 boot files.
I booted from the liveCD simply to see what the regular installer had done to the HDD. Eventually I did install from the liveCD and that has allowed the system to boot from the HDD again.
I am sort of perplexed as to why there is no simple provision to reuse the entire disk as I recall was the case with previous versions of CentOS. Why the laborious requirement to delete each mount point from an install one wishes to remove entirely?
In any case, I have gotten past the difficulty and have built zfs for 3.10.0-123-9.2. Now to see if I can figure out how to rebuild the system using zfs.