On Thu, Aug 20, 2009 at 08:50:59AM -0500, Marco Peereboom wrote: > I am sure you misunderstood me.
No, I understand quite clearly that ZCR is a pile of marketing drivel. At this point in my life, I apply that same belief to any "RAID" technology that ships standard on a motherboard. There might be some out there that actually provide hardware acceleration. There might be some out there that are a dream to manage within OpenBSD. I've yet to see any that are compelling enough to justify keeping a spare motherboard on hand. A couple years back there were rumors of standardization on the RAID meta data between vendors and keeping a spare motherboard on hand would be unneccesary. By murphy's law whatever hardware ends up under my control won't be standardized. At least with JBOD and software RAID I won't have to worry about incompatible metadata. > > LSI RAID and SCSI/SAS cards are great. The best in the industry. In > fact I run virtually all my machines on some variation of those cards. > I even revamped ami(4) last christmas. At the same time I added bio(4) > support for mpi(4) cards. I always quite liked LSI SCSI cards. Unfortunately, I immediately discounted the LSI RAID cards when they acquired the the megaRAID name. It's a bias I developed after encounters with several American Megatrends megaraid controllers on motherboards. I was wrong to discount all LSI MegaRAID products. But I have a strong suspicion that the LSI MegaRAID card mentioned by the original poster is one that would be most effectively used as JBOD controller. > > I can't comment on ARC but it was written by dlg so the driver is going > to be as good as it gets. > > Zero Channel Raid is marketing drivel. The zero stands for usefulness. > > On Thu, Aug 20, 2009 at 09:37:48AM -0400, Chris Dukes wrote: > > On Wed, Aug 19, 2009 at 06:01:57PM -0500, Marco Peereboom wrote: > > > ZCR is marketing fluff. It ads nothing. > > > > The same could be said for most LSI megaRAID products. > > http://www.openbsd.org/cgi-bin/man.cgi?query=mfi&sektion=4&arch=i386&apropos=0&manpath=OpenBSD+Current > > seems to be an exception, but I doubt it's the card Jeff is describing. > > > > A skim through http://www.openbsd.org/amd64.html > > in the RAID and Cache Controllers section gives me the > > impression that the only controllers worth spending > > money on are the mfi ones and the arc ones. > > > > Anything else is best run in JBOD mode and managed through > > raidframe/softraid. > > > > -- > > Chris Dukes > -- Chris Dukes
