Oracle Linux, which is the base of Oracle VM is based on RHEL 5.
Another clone is CentOS 5. Current version: 5.8.
But: current tar-Version there is 1.15.1, too.
So if you want to get a newer version you have to compile it.
For this you can include the CentOS-repositories into Oracle-Linux and install the needed compilation tools (gcc...).
OR try to get a way around using that "no-check-device" option.
Update 2013-06-07 about loopback-mounting:
Your problem with the changing major/minor propably arises because Oracle-VM itselv is dynamically using loopback-mounts by itselv. I would recommend the following steps:
losetup your backup-image to a high-numbered loopback-device (like /dev/loop50)
- Do a
kpartx -av on that device (this should give you a device for the Windows-C-partition)
- Mount that partition ro (propably with ntfs-utils or newer)
- Do your incementaly backup with
- release the loopback-device with
I will provide further details when I am on a CentOS-box (including your repository-question).