<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">Hi,</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">I also face this kind of error while installing centos from usb drive and when I select it uefi mode in bios its got resolve the issue and finally i am able to install centos from usb drive.</div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div><font face="verdana, sans-serif"><br></font></div><font face="verdana, sans-serif"><div><font face="verdana, sans-serif"><br></font></div><div><font face="verdana, sans-serif"><br></font></div><div><font face="verdana, sans-serif"><br></font></div>Regards,</font><div><font face="verdana, sans-serif">Sahil | 9930870258</font></div></div></div></div>
<br><div class="gmail_quote">On Mon, Dec 14, 2015 at 5:30 PM, <span dir="ltr"><<a href="mailto:centos-virt-request@centos.org" target="_blank">centos-virt-request@centos.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">Send CentOS-virt mailing list submissions to<br>
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Today's Topics:<br>
<br>
1. boot thumbdrive with CentOS 7 ISO??? (ken)<br>
2. Re: [CentOS] boot thumbdrive with CentOS 7 ISO??? (ken)<br>
<br>
<br>
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<br>
Message: 1<br>
Date: Sun, 13 Dec 2015 16:48:25 -0500<br>
From: ken <<a href="mailto:gebser@mousecar.com">gebser@mousecar.com</a>><br>
To: CentOS mailing list <<a href="mailto:centos@centos.org">centos@centos.org</a>>, <a href="mailto:centos-virt@centos.org">centos-virt@centos.org</a><br>
Subject: [CentOS-virt] boot thumbdrive with CentOS 7 ISO???<br>
Message-ID: <<a href="mailto:566DE7A9.9060307@mousecar.com">566DE7A9.9060307@mousecar.com</a>><br>
Content-Type: text/plain; charset=utf-8; format=flowed<br>
<br>
The big picture is I'm wanting to boot centos 7 and install kvm.<br>
<br>
So far I've created on this new laptop a big, empty partition; in the<br>
BIOS enabled legacy booting and disabled UEFI; also in BIOS under Legacy<br>
Boot Order set "USB diskette on key/USB hard disk" on second priority.<br>
I've tried to boot from a usb thumbdrive three times and it failed all<br>
three times. I'm not understanding what's wrong.<br>
<br>
I tried all three methods below as root using CentOS 5.11, copied it to<br>
the thumbdrive with:<br>
<br>
dd if=CentOS-7-x86_64-Everything-1503-01.iso of=/dev/sda bs=1024<br>
<br>
(Tried this because some webpage said)<br>
<br>
isohybrid CentOS-7-x86_64-Everything-1503-01.iso<br>
<br>
dd if=~CentOS-7-x86_64-DVD-1503-01.iso of=/dev/sda<br>
<br>
None of these successfully booted. Instead they ignored the flash drive<br>
as it wasn't there.<br>
<br>
Documentation in various webpages I found gave different recipes for<br>
creating the thumbdrive contents (many of which didn't make sense to<br>
me). Does anyone have experience with success with this...?<br>
<br>
Thanks much.<br>
<br>
<br>
PS. Also in the BIOS, should I enable Virtualization Technology? I'm<br>
sorting guess I should. The Windows docs recommend not to. I'm<br>
thinking though it would be preferred for KVM. What's the certain verdict?<br>
<br>
<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Mon, 14 Dec 2015 04:30:08 -0500<br>
From: ken <<a href="mailto:gebser@mousecar.com">gebser@mousecar.com</a>><br>
To: CentOS mailing list <<a href="mailto:centos@centos.org">centos@centos.org</a>>, <a href="mailto:centos-virt@centos.org">centos-virt@centos.org</a><br>
Subject: Re: [CentOS-virt] [CentOS] boot thumbdrive with CentOS 7<br>
ISO???<br>
Message-ID: <<a href="mailto:566E8C20.6080701@mousecar.com">566E8C20.6080701@mousecar.com</a>><br>
Content-Type: text/plain; charset=utf-8; format=flowed<br>
<br>
On 12/13/2015 05:00 PM, Frank Cox wrote:<br>
> On Sun, 13 Dec 2015 16:48:25 -0500 ken wrote:<br>
><br>
>> So far I've created on this new laptop a big, empty partition; in<br>
>> the BIOS enabled legacy booting and disabled UEFI; also in BIOS<br>
>> under Legacy Boot Order set "USB diskette on key/USB hard disk" on<br>
>> second priority. I've tried to boot from a usb thumbdrive three<br>
>> times and it failed all three times. I'm not understanding what's<br>
>> wrong.<br>
><br>
> I install Centos on pretty much everything by setting the bios to use<br>
> USB as the primary boot device, then booting the Centos Live Image<br>
> from a flash drive, then hitting the "install to hard drive" icon on<br>
> the Live Desktop. After the installation is complete, set the bios<br>
> back to use the hard drive as the primary boot device and you're all<br>
> set.<br>
<br>
Aha! The problem was that, despite legacy was enabled and uefi was<br>
disabled, the bios followed 'uefi boot order' and disregarded 'legacy<br>
boot order'. Once I changed uefi boot order appropriately, the bios<br>
booted the thumbdrive.<br>
<br>
However, when the centos menu came up, i.e.:<br>
<br>
Install CentOS 7<br>
Test this media & install CentOS 7<br>
Troubleshooting --><br>
<br>
[use 'e' or 'c' keys]<br>
<br>
regardless of which of the above three I selected via right-arrow, I was<br>
prompted by:<br>
<br>
error: invalid magic number.<br>
error: you need to load the kernel first.<br>
Press any key to continue...<br>
<br>
I tried also using the 'e' and 'c' keys off this menu; this brought into<br>
other menus (which are too much to type up) and on another menu where ^E<br>
and ^X can be used to 'edit' and 'execute' boot statements, none of<br>
which works correctly or is obvious what to alter or enter.<br>
<br>
I also got into an interface with a 'grub>' prompt. I tried some of the<br>
grub commands, but had little clue what to do with that. E.g.,<br>
"linuxefi /isolinux/isolinux.bin" returned "error: invalid magic<br>
number." Interesting, but not getting CentOS 7 booted.<br>
<br>
Any know what else is possible?<br>
<br>
<br>
<br>
------------------------------<br>
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End of CentOS-virt Digest, Vol 100, Issue 12<br>
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</blockquote></div><br></div></div>