Linux starts out booting using BIOS calls to the "bootable device" (hard drive, etc). This all done by a bootloader itself. Once the kernel and initramfs is loaded into memory, the processor switches to a more advanced mode (from "real" compatibility mode) and starts executing the kernel. At this point it is up to the drivers in Linux to be able to find its file system. I'm guessing it is NOT. This could be that there is not a driver loaded for the hardware that contains the file system, or perhaps the BIOS has done some sort of switch of boot device order such that the kernel is now looking in the wrong place for its file system. The later can be dealt with by adding some direction to the boot loader to boot on the correct device. Since you are booting on USB, there is a lot that could go wrong here as the USB hardware itself could be missing a driver, and likely is. Typically the driver for this would be compiled as a separate module then loaded into the initramfs file system for the kernel to load. Your CentOS might not have done this, at least for the actual USB port device hardware you have, which means you would have to add it yourself and rebuild the initramfs (and finally the change the file system on the USB storage device you are using). This is a little involved to do.
In any case, look further back on the boot messages (use "shift - page up" to scroll up the page if needed) and check that a driver for the hardware that the file system did get loaded and the storage device itself did get found and is what the kernel is looking for. For example, look for /dev/sda1 if that is what it thinks it should boot on and make sure that device didn't end up being set as /dev/sdb1 instead! If there is no mention of a "sdx" device then my original theory that the driver never got load would prevail. In this case I would resort to installing the file system on a traditional non-USB device (as in a SATA device) to get things going quickly. Date: Tue, 8 Mar 2016 19:23:30 -0500 From: Jamie Dennis <[email protected]<mailto:[email protected]>> To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: Re: [RDD] Newbie with a New Install Message-ID: <[email protected]<mailto:[email protected]>> Content-Type: text/plain; charset="utf-8" Well, I tried the CentOS 7 Live DVD installed on a bootable USB created by unetbootin-windows-613 and I get a ? Kernel panic ? not syncing: Attempted to kill init! And then it stops. I?m beginning to think it is something with a BIOS setting but I don?t know. Thanks, -Jamie
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