Networked rebuild and self-healing in HAMMER2

[PeerCorps Trust Fund]

Hi,

If I understand the HAMMER2 design documents, one of the benefits that it brings is the ability to rebuild a failed disk using multiple networked mirrors? It seems that it also uses this capability to provide data healing in the event of corruption.

If this is the case, are these processes transparent to the user based on some pre-defined failover configuration, or must they be manually set off in the event of a disk failure/corruption?

Also, would RAID controllers still be necessary in the independent nodes if there is sufficient and reliable remote replication? Or could a HAMMER2 filesystem span the disks in a particular node and have the redundancy of the remote replication provide features that otherwise would come from a RAID controller?

Thanks for any clarifying statements on the above!

-- 
Mike