Re: KVM-74: HELP PLEASE - cannot boot from cdrom for recovery

[Gerry Reno <greno@verizon.net>]

Tomasz Chmielewski wrote:
> Gerry Reno schrieb:
>> Tomasz Chmielewski wrote:
>>> Gerry Reno schrieb:
>>>> Today we upgraded one of our VM's from F9 to F10 and after the 
>>>> first reboot we see the dreaded GRUB prompt.  This it turns out is 
>>>> a known problem with F10 installs.  And the recovery is usually 
>>>> very simple.  You boot into rescue mode from CDROM and reinstall 
>>>> the boot loader.  The problem we're seeing is that even though I 
>>>> select CDROM from the boot menu, it will never boot from the 
>>>> CDROM.  It always has an error.
>>>
>>> What error?
>>>
>> Boot Failure Code:  0003
>> Boot from CDROM failed:  cannot read the boot disk.
>> FATAL: No bootable device.
>>
>> The host has only a DVD drive and we are using the DVD F10 install disk.
>>
>>>
>>>> What can we do to get this VM to boot from the CDROM drive so that 
>>>> we can install a  new bootloader and recover this VM?
>>>
>>> What parameters do you use to start the guest?
>>>
>>>
>> I'm using the GUI VMM and selecting Run on that VM.
>
> What is GUI VMM?
virt-manager

> Do you know what parameters it passes to kvm binary?
>
>
Here's the XML dump for that VM:
<domain type='kvm' id='8'>
  <name>MX_3</name>
  <uuid>5f478a4f-86e6-82b5-b53b-acff9d9f1f23</uuid>
  <memory>524288</memory>
  <currentMemory>524288</currentMemory>
  <vcpu>2</vcpu>
  <os>
    <type arch='i686' machine='pc'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <source file='/var/vm/vm1/qemu/images/MX_3/MX_3.img'/>
      <target dev='hda' bus='ide'/>
    </disk>
    <interface type='bridge'>
      <mac address='00:0c:29:e3:bc:ee'/>
      <source bridge='br0'/>
      <target dev='vnet1'/>
    </interface>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='5901' autoport='yes' listen='127.0.0.1' 
keymap='en-us'/>
  </devices>
</domain>

Regards,
Gerry