On Tue, 2008-10-28 at 00:08 +0000, Andrew Wasilczuk wrote: > > As far as I remember you can share a single vdi between two or more vm's > as long as the vdi is immutable. To enable this you'll need to use the > command line. > > Unregister the vdi first: > > VBoxManage unregisterimage disk ~/.VirtualBox/VDI/<hostname>.vdi > > And register as immutable: > > VBoxManage registerimage disk ~/.VirtualBox/VDI/<hostname>.vdi -type > immutable > > However, all changes made to this vdi will be lost after a reboot.
Oh. :-( > Otherwise, having two machines writing to the same file system will > probably mess it up. You are assuming that the shared device has a non cluster-aware filesystem on it. That may not be the case, and even if it were, there are HA uses for having two machines able to access the same device (even if not at the same time). I was in fact going to use VirtualBox for my Lustre (OSS and MDS) targets (test cluster) in a failover configuration like I do with VMware Server currently, but if sharing a disk device is not possible I won't be able to use VirtualBox for this. :-( b.
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