On Sat, 2010-01-09 at 07:14 -0800, nate wrote: > JohnS wrote: > > > Interesting link for info there. I found [1] and at the bottom of the > > page there is like tidbits of info in PDFs of the different models. Any > > idea where I could get more info than that, like data sheets and case > > studies. > > Not online at least, note the "Confidential" stuff at the bottom of > every page I believe that data isn't supposed to be online, I have copies > myself but don't post them directly. > > They are more than happy to give this information to you directly > though, not sure why they sort of try to protect it from public view, > but it's a common practice, I can't recall ever seeing a data sheet on > any storage array that showed it's performance numbers, unlike network > gear which often is filled with performance related information. > > If your referring to the E and S series arrays they are roughly half > the performance of the F and T series. I don't believe E and S are > being sold anymore as new systems, when the T came out for example it > was only about 10-15% more than the S, and you get a ton more in > performance, addressable capacity, and features than the S(or E), > making it fairly pointless to go with an S or an E. I also suggest against > the F200 as well, their systems are at their best when you have more > than two controllers, any system can run on only two, so the extra > online scalability comes at a small premium and gives good peace of > mind, even if you never add the extra controllers. > > > My main problem is bandwidth and workload. Another problem is I am > > being told there is such a thing as Triple Disk Mirroring. Then I am > > being told that there is not and all it is only Raid 1 with just > > Replication to another Volume Set, sorta like a LVM Snapshot so to > > speak. Last thing is I am told GE is just rebranded Brocade. Thanks > > for the info & link. > > There absolutely is triple mirroring, and probably quadruple as well, > but most systems don't support it. Synchronous(and/or/both asynchronous) > replication is of course available as well. Triple mirroring really > is a waste of resources when your performing RAID at a sub-disk > level like they(and some others IBM XIV, Compellent, Xiotech) do. True > data availability would come from synchronous replication(up to 130 > miles away I think is the limit, latency is the reason, ~1.3ms is max) > to another system. > > I'm not sure what "GE"(makes me think of General Electric) is but there > are quite a few re branded Brocade switches out there, and probably > Qlogic as well. > > Their latest code release 2.3.1 just went GA yesterday, been shipping > on new boxes for a few weeks, largest software update in the company's > 10 year history, some pretty impressive new things, some of which I > can't talk about just yet but they're more than happy to tell you in > person. > > I've been waiting for over a year for it myself so am pretty > excited, upgrading next weekend. > > Getting kind of OT though if you want more info email me off-list, > always happy to talk about this kind of stuff I love fancy technology. > > > nate --- Sure, will later on in the day. Thanks, John