Attaching to a Console with the Grub Boot Loader
E.12 TAP Disks with Paravirtualized Guests
This release of Oracle VM Server does not support tap Disks with paravirtualized guests. If you use tap disks, you may encounter problems. For example, only one domain can be started and shut down before the blktapctrl process becomes unusable (using tap:sync or tap:aio works once only). If you want to use tap disks, to work around this problem, kill and restart the blktapctrl process. Do not pass the blktapctrl process any arguments.
E.13 CD-ROM Image Not Found
If you create a paravirtualized or hardware virtualized guest using a configuration file, and the CDROM image cannot be found during the installation, you may have the IDE devices in the incorrect order. Putting the IDE devices in order fixes this problem.
Check that the disk = [ ... ] parameter is defined as hdc:cdrom and is included before hda, otherwise the usual boot='dc' configuration fails to find the CDROM image.
E.14 Firewall Blocks NFS Access
Oracle VM Server blocks NFS access from any external computer (or guest) by default. This may cause problems when trying to create a guest using an NFS connection. To resolve this, disable the firewall with the following command:
service iptables stop
E.15 Migrating Domains
You cannot migrate domains on computers with hardware that is not identical. To migrate a domain, you must have hardware that is the same make and model. You must also have the same Oracle VM Server release.
E.16 Attaching to a Console with the Grub Boot Loader
Tracking down startup problems with a hardware virtualized guest may be difficult because you may not be able to attach a console using the xm console command. To workaround this problem, you can include a console in the Grub boot loader, and connect to a console during boot.
To include a console in the Grub boot loader, add the following lines before the first "title ..." line in the /etc/grub.conf file:
serial | unit=0 | |
terminal | console |
Troubleshooting
