[Users] which file system for shared disk?

[Piotr Szubiakowski]

>> The way that oVirt manage storage domains accessed via FC is very smart.
>> There is separate logical volume for each virtual disk. But I think that
>> logical volume at the same time could be "touched" only by one host. Is
>> it possible that two host access read/write the same logical volume and
>> there is no data corruption?
>
> hence a shared disk over block storage using LVM must be 
> pre-allocated, so no LV changes (lv extend) would be needed.
> (also, it cannot have snapshots, since it would become qcow)

Ok, but this is the hypervisor view. For a guest OS this LV is normal 
RAW block device. I wonder if someone test this feature and access 
shared disk from many VM's at the same time?

Thanks,
Piotr