From owner-freebsd-questions@FreeBSD.ORG Fri Apr 4 02:52:35 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 3DF2C63B for ; Fri, 4 Apr 2014 02:52:35 +0000 (UTC) Received: from outgoing.tristatelogic.com (segfault.tristatelogic.com [69.62.255.118]) by mx1.freebsd.org (Postfix) with ESMTP id 16466DEA for ; Fri, 4 Apr 2014 02:52:34 +0000 (UTC) Received: from segfault-nmh-helo.tristatelogic.com (localhost [127.0.0.1]) by segfault.tristatelogic.com (Postfix) with ESMTP id 797793ADFA for ; Thu, 3 Apr 2014 19:52:34 -0700 (PDT) From: "Ronald F. Guilmette" To: freebsd-questions@freebsd.org Subject: Re: CAM status: CCB request completed with an error In-Reply-To: <20140403231108.F92606@sola.nimnet.asn.au> Date: Thu, 03 Apr 2014 19:52:34 -0700 Message-ID: <7896.1396579954@server1.tristatelogic.com> X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Apr 2014 02:52:35 -0000 In message <20140403231108.F92606@sola.nimnet.asn.au>, Ian Smith wrote: >In freebsd-questions Digest, Vol 513, Issue 5, Message: 29 >On Thu, 3 Apr 2014 03:40:09 -0400 kpneal@pobox.com wrote: > > On Wed, Apr 02, 2014 at 03:48:21AM -0700, Ronald F. Guilmette wrote: >| Apr 2 03:40:31 segfault kernel: (da0:umass-sim0:0:0:0): READ(10). CDB: 28 0 > 0 1e 6f ff 0 0 1 0 >| Apr 2 03:40:31 segfault kernel: (da0:umass-sim0:0:0:0): CAM status: CCB req >uest completed with an error >| Apr 2 03:40:31 segfault kernel: (da0:umass-sim0:0:0:0): Retrying command >| Apr 2 03:40:37 segfault kernel: (da0:umass-sim0:0:0:0): READ(10). CDB: 28 0 > 0 1e 6f ff 0 0 1 0 >| Apr 2 03:40:37 segfault kernel: (da0:umass-sim0:0:0:0): CAM status: CCB req >uest completed with an error >| Apr 2 03:40:37 segfault kernel: (da0:umass-sim0:0:0:0): Retrying command > >repeated every few seconds clearly enough indicate disk READ(10) errors, Yes. That part, at least, is crystal clear. >all apparently at the same place, Come again please?? How did you reach THAT conclusion? You are obviously seeing something within these syslog messages that your average garden variety rube (like me) is not seeing... or likely to see. >and should most likely be considered >serious enough to warrant knowing about .. maybe doing something about? For the record, here are a few relevant facts: 1) As I later determined, the messages in question are all relating to either or both of two (2) USB memory sticks that I have installed... essentially on a permanent basis... into the server in question. 2) There is not, was not, and has not been _any_ hardware problem of any kind with _either_ of the two USB stick in question. Upon shutdown and reboot, both are working just fine, with no errors whatsoever. (These things have no moving parts. With what I am sure are extra- ordinarily rare exceptions, these things don't just simply "go bad", notwithstanding rare anecdotes to the contrary.) 3) I have, over time, experienced multiple serious problems with, um, various, shall we say, "non-features" of the FreeBSD USB driver(s). The endless cascade of syslog messages I reported all appear to have been caused by yet another one of these, albeit a new one... *not* one of the incredibly troublesome ones that I was already and previously familiar with. A retorical question: Am I really the only person for whom the FreeBSD USB driver(s) seem to keel over and die the instant one has the unmitigated audacity to even look at them sideways? I do get the impression that probably >95% of all FreeBSD installs, everywhere, are on systems contained in Big Racks within Big Data Centers where none of said systems ever come within a country mile of any USB sticks... or even within a country mile of any USB mass storage of any kind... and that thus, it is only the occasional fool like me... who tries (with dubious sanity) to use FreeBSD as my desktop OS... who ever sees just how un-evolved the USB drivers are, you know, for anything other than (relatively less taxing) mice, keyboards, and printers. To say that the FreeBSD USB driver(s) appear to lack the ability to fail gracefully would, I think, and given the evidence I posted, appear to be an understatement. To say that they also _perceive_ hardware failure when there is in fact none present, is, for me at least, a truth beyond question. Regards, rfg