Date: Sat, 10 Jan 1998 14:21:14 -0700 (MST) From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> To: Ollivier Robert <roberto@keltia.freenix.fr> Cc: scsi@FreeBSD.org Subject: Re: ncr CAM code Message-ID: <199801102121.OAA13426@narnia.plutotech.com> In-Reply-To: <19980110150728.28270@keltia.freenix.fr>
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In article <19980110150728.28270@keltia.freenix.fr> you wrote: > Hi Justin and everyone, > I just made a kernel with the new CAM code that includes ncr support and > this is what I get with "boot -v". It works (this message is sent with a > system running kernel.cam) but I don't understand the messages below... > Why are the two 34330W IBM drives running with a speed of 6.6 MB/s while > the 32160 is found as an ultra drive at 20 MB/s ? The conner is also found > at 3.3 MB/s when it should probably be at 10 MB/s (or I have misunderstood > what the numbers say). It looks like I broke wide followed by sync negotiation when I did the port. The 34330Ws are never asked to go sync, so you get the async speed exported by the NCR X 2 reported. I'll have to go scrounge up a wide device I can stick on the 875 I have here to fix it. BTW, the async reporting is done the way it is since some SCSI bus topologies (like fibre channel and SSA) don't have a notion of transfer negotiations. So, the CAM code has a concept of a base transport speed which it will report unless the controller updates the XPT's concept of what negotiated transfer parameters are in effect. As for the conner, I'm not really sure what I did to upset it, but maybe as I look into the first problem I'll understand how it could be left async. My guess is it has something to do with the message reject that is reported, but I don't know from the error message how to tell what message was rejected. It could also be that I screwed up the transfer negotiation events that are supposed to be sent to the XPT layer and that the transfer speeds are really correct. -- Justin T. Gibbs =========================================== FreeBSD - Turning PCs into workstations ===========================================
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