Hey Frank, * Frank Ludolph (Frank.Ludolph at Sun.COM) wrote: > I get all of that, except mirroring is not a backup. None of the raid > modes are. Not in any serious storage conversation I've ever had or > listened to. Mirroring is about availability which is very different > from restoring from data loss. And I'm by no means a storage expert. > > > Given previous file systems I would agree that mirroring is not backup, > but ZFS is much more robust in the face of many types of failures, e.g. > power failure or sudden shutdown, that could corrupt other file systems. > But I also agree that mirroring is still backup-lite.
Ok, we're in agreement on the 'backup-lite' angle then. I can bend that far ;-) > TS is also looking at network-based backup that addresses other failure > modes, e.g. destruction of the physical plant and theft. This would > probably use ZFS backup (and would also be available for attached > storage). Good to know. > But ultimately TS and Slim are a desktop solutions, not an enterprise > solutions. I understand what you're saying here and I don't entirely disagree with this statement. I will however say, that I know plenty of 'end-users' that want to mirror drives. Also, I'm pretty sure I've seen some laptop configurations that include dual drives. I know I'd mirror those drives if I had such a configuration on my development laptop. So, there's some change going on in terms of enterprise configurations becoming more mainstream I think. Anyway, let's see what happens in the discussion you and Dave are going to have. Cheers, -- Glenn
