Hello John, I don't know what the other profs will say,but I would take at least a double channel raidcontroller and put at least half of the disks at one channel and the other disks at the other channel.
and make a config like channel a: disk a, b, c, (half of 1st array) channel b: disk a',b',c' (second half of 1st array) channel a: disk d,e,f (half of 2nd array) channel b: disk d',e',f' (second half of 2nd array Then I guess you have quite ok datatransferrates and I think it's unlikely that scenarios like posted before that raid failes because of freezing channels will break your arrays. Probably I don't need to write this, but pls don't put your tapedrive at the same controller or something like that. So, I'm curious what the experts say about this config, but I think this is quite foolproof.. Regards, Arno Op vrijdag 12-03-2010 om 16:10 uur [tijdzone -0600], schreef John G. Heim: > From: "Eric Rostetter" <rostet...@mail.utexas.edu> > The other trap would be what happens if you get "spam bombed" and get say > > a couple million spams sent to you in an hour or so... Do you expect to > > survive this without slowdown, or is it okay that it slows down until the > > spam bomb dies down? You might only get a spam bomb like this once every > > 5 years, but if it does happen, what are your expectations? (Here spam > > bomb could also be a joe-job, a virus outbreak, or other unexpected mail > > event... Pick your favorite...) > > > > Well, this is actually the problem... I am about as sure as I can be that a > "spam bomb" is not a noce every five year event. We get flooded with spam > pretty regularly. Its probably not a million messages a day but more like > 50,000 in two hours and then little or nothing for the next 22 hours. > > > Yeah, we can survive that. Its not like classes would be cancelled if some > prof can't get his mail or the response time on the web server is so slow as > to drive people away. But if it can be avoided, it would be very nice. > > I really think my boss is nearly out of patience with me. I think I know > what I want though. If I want to set up two RAIDs, one for the operating > system and one for the database files, do I need two PERCs? Can a single > PERC put 2 disks in a RAID-1 array and 3 others in a RAID-5 array? > > _______________________________________________ > Linux-PowerEdge mailing list > Linux-PowerEdge@dell.com > https://lists.us.dell.com/mailman/listinfo/linux-poweredge > Please read the FAQ at http://lists.us.dell.com/faq -- Arno van der Veen +386 31 629 556 wwww.technologist.si _______________________________________________ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
