On Fri, Jan 26, 2001 at 10:59:38AM -0600, Vince Mulhollon wrote: > Software RAID: > Controllers are available everywhere. If you have the good sense to use > IDE, you can "borrow" a controller card from any workstation. Also "all" > IDE controllers are compatible with each other. Sure there are > enhancements such that some are faster or whatever, but all of them will at > least work together. Yeah right, I'm going to build a high performance server on IDE <snicker> > Hardware RAID: > Controllers made by small companies, not stocked in your state. If the > controller blows you're probably down until the post office delievers. > Even better, I've heard stories of incompatible controllers. So if a ABC > brand controller fries, and you install a XYZ brand hardware RAID > controller, you get to repartition, restore your backups, and start over. IBM is a really small company, and really hard to buy stuff from. > If you have the cash to keep spare HW RAID controllers onsite, then you've > probably got the cash to setup duplicate servers. If you have duplicate > servers, you don't need RAID because you already have overall system layer > redundancy, so you don't need RAID. A solution in search of a problem. This does not follow. If I've got the money to keep a $1000 raid card as a spare I've got the money to keep a $5000 server on the network (which I may or may not own; more expenses), and I've got to keep the data synced? Yi. I'd be more convinced if you'd talked about using _two_ hardware raid controllers, and running software raid 1 over each array ... > Now there might be are other reasons for RAID, but hardware raid is a > reliabilty loss not gain. I'm still not seeing how you arrive at this conclusion. I suppose we'll have to agree to disagree. > The only attempts to explain why HW RAID is better revolve around nonsense > like "its not important unless you spend extra money" or something. Uh huh ... you run a lot of raid 5? > ----- Forwarded by Vince Mulhollon/Brookfield/Norlight on 01/26/2001 10:12 Norlight ... aren't you guys "the guardians of data" or something like that? -- Nathan Norman - Staff Engineer | A good plan today is better Micromuse Inc. | than a perfect plan tomorrow. mailto:nnorman@micromuse.com | -- Patton
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