Creating mirrored chunks

I'm in the middle of building a server and it strikes me that onspaces is a bit daft when adding new mirrored chunks. It takes an *age* to do this which suggests it's actually copying everything from primary to mirror, even though both should be empty. Is this what's happening? Is there a valid reason for it? Adding an un-mirrored 2Gb chunk takes about a second, which suggests there's no "formatting" within it, so what's the point of syncing an empty primary to its mirror? Jon.

Jon Myatt wrote in message <374510E8.CAB59377@webpower.co.uk>... >I'm in the middle of building a server and it strikes me that onspaces is >a bit daft when adding new mirrored chunks. It takes an *age* to do this >which suggests it's actually copying everything from primary to mirror, >even though both should be empty. Is this what's happening? Don't know, but I wouldn't be surprised. onstat -D would tell you. Anyway, it's not a bad idea to make sure that every page in the old and new chunk is readable/writeable is it? Neil P.S. Is your mirror a raw disk chunk?