Date: Thu, 20 Nov 1997 18:08:44 -0800 (PST) From: Ricardo Kleemann <ricardo@americasnet.com> To: "N. Del More" <noel@inr.net> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: DPT PM2144UWR Message-ID: <Pine.LNX.3.95.971120180436.12632B-100000@linux1.americasnet.com> In-Reply-To: <3.0.1.32.19971120193818.0099e6a0@Bilbo.INR.Net>
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Hi, That sounds wonderful. Couple of questions: 1. If there IS a freebsd driver, where would I find it? 2. Can you explain to me how the RAID 5 works on the DPT? For example, how is recovery done upon failure of one of the drives? 3. In RAID 5 mode, how does the diskspace work out? What I mean is how do you calculate it? It's easy for RAID 0 (add the drives), RAID 1 is the total divided by the number of mirrors. But in RAID 5 what's the calculation? If I use 3 2.5Gb drives, how much total space would I have? thanks Ricardo On Thu, 20 Nov 1997, N. Del More wrote: > I've been told that their is a driver available for it, frankly, I HOPE > that the FreeBSD org begins supporting the DPT cards since it works the > absolute NUTS under BSDI!! > > Not only that, but it's almost "sexy" to watch in action!! All them neat > LED's on the card blinkin' and flashin' (woohoo!!). > > Seriously though, it dropped right into the BSDI server, and came up > screaming with a couple of Barracuda's attached. Not only that but it > concurrently supports SCSI/SCSI-2 (8 bit) on a separate channel, has the > RAID add-on card. and up to 64 MB of cache. > > Finally, the Adaptec 2940 that resided in the box beforehand, couldn't even > handle patching the kernel without doing each patch one at a time to avoid > a kernel panic and shutdown. The DPT flew through it, and on a Pentium 233 > with 128 Mb. RAM applied all of the 3.0 -> 3.1 BSDI patches in 1 min., 3 > sec. A fellow ISP who was helping me with the upgrade suggested I might > not get out of his house with it. > > I've used Adaptec for years, but now I'm hooked on DPT!! > > Noel > > At 10:30 AM 11/20/97 -0800, you wrote: > >can anyone confirm freebsd supports the DPT raid controller (2144UWR)? > > > > +------------------------------+ +---------------------------------+ > | N.B. Del More noel@inr.net \ \ An Internet Connection? Sure!| > | inr.NET \ \ Do you want to be on | > | InterNet Resource Networks, LLC \ \ diss.net ? | > | http://www.inr.net \ \ datt.net ? | > | http://www.diss.net \ \ or do you just wanna be | > | http://www.datt.net \ \ on da inr.net ? | > +-------------------------------------+ +--------------------------+ >
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