Date: Sun, 24 Jan 1999 01:43:41 -0500 (EST) From: spork <spork@super-g.com> To: Patrick Greenwell <patrick@namesecure.com> Cc: Robert Adams <radams@siscom.net>, qmail@list.cr.yp.to, freebsd-isp@FreeBSD.ORG Subject: Re: Building new mail system Message-ID: <Pine.BSF.4.00.9901240106330.18322-100000@super-g.inch.com> In-Reply-To: <Pine.BSI.4.04.9901232049030.10889-100000@po1.namesecure.com>
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On Sat, 23 Jan 1999, Patrick Greenwell wrote: > Did you ever consider that that might be your problem, as CAM is > constantly being worked on and AFAIK isn't being back-ported to 2.2.X? Oh, did I ever ;) After some email exchanges with one of the CAM folks though, I'm pretty confident that cam is a much more stable choice than the old drivers for the adaptec card I'm using. The stock drivers couldn't even find a second partition on the CMD even with the LUNs wired down in the kernel config. Some informal benchmarking also confirms that performance is greatly enhanced, especially when you have many reads and writes cued up on a busy system. I'm running patches specifically for the 2.2 branch at this time. I believe there will be a final version sometime this month. I've also found that the CMD only handles a total of 64 tagged commands, which is less than the Mylex which I believe has double that. > I'm running a couple of CMD based boxes hooked to BSDi boxen and they run > flawlessly... Yep, one of the things that sold me was the praise from people already using them. Also I think CMD is the only one that has all the RAID 5 math done in an ASIC, which is probably speedier than the i960 the mylex uses. Then again, it seems the walnut creek folks have had excellent results with their mylex or wcarchive. I also have a quick question for you: What controller are you using? If it's an Adaptec, is disconnection enabled or disabled? I believe the default is enabled. Thanks, Charles > > /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ > Coming to the ISPF-II? The Forum for ISPs by ISPs http://www.ispf.com > (tinc) > \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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