T3 mirror vs partner-pair
I need a storage sub-system(s) with no single point of failure based on T3 arrays, and nothing but T3 arrays. In an environment where the volume of data will fit on a single array, the cost of mirroring vs partner-pair is broadly similar - I'll need two arrays either way. However, if the data requires 2 arrays, I'll need 4 if mirroring, but still only 2 if using a partner-pair. What I really need is to know what the Availability differences would be with both configurations - 99.9%, that sort of thing. Where can I get this sort of detailed info, it must exist?
Thanks
[596 byte] By [
horrice] at [2007-11-25 23:12:39]
# 1
There is no real easy answer that I know of, but you can get some useful informations from
http://www.sun.com/solutions/blueprints/browsesubject.html
There are countless articles on RAS in here and some specifics on the good old T3 for maximum availability potential and performance. I don't think that any of these articles will give an exact figure for your availability as it is dependant on too many aspects, but you might be lucky. I know it took me a couple of days to work out the MTBF of a photon array a few weeks ago, and still had to do some assumtion making and margin errors as some figures where not available or slightly inflated in my opinion.
Happy hunting.
