From owner-freebsd-fs@freebsd.org Tue Jan 5 17:21:05 2016 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 31C16A6250A for ; Tue, 5 Jan 2016 17:21:05 +0000 (UTC) (envelope-from mi+thun@aldan.algebra.com) Received: from vms173007pub.verizon.net (vms173007pub.verizon.net [206.46.173.7]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 128FC18D5 for ; Tue, 5 Jan 2016 17:21:04 +0000 (UTC) (envelope-from mi+thun@aldan.algebra.com) MIME-version: 1.0 Received: from aldan.narawntapu ([100.1.236.52]) by vms173007.mailsrvcs.net (Oracle Communications Messaging Server 7.0.5.32.0 64bit (built Jul 16 2014)) with ESMTPA id <0O0H008E5PIB8Z80@vms173007.mailsrvcs.net> for freebsd-fs@freebsd.org; Tue, 05 Jan 2016 11:20:40 -0600 (CST) X-CMAE-Score: 0 X-CMAE-Analysis: v=2.1 cv=WpDWSorv c=1 sm=1 tr=0 a=UorMnhrCY2jH/mPejITChw==:117 a=LaogzpLLAAAA:8 a=oR5dmqMzAAAA:8 a=7aQ_Q-yQQ-AA:10 a=r77TgQKjGQsHNAKrUKIA:9 a=-jmxLMdozlTs3IuwV8oA:9 a=bVxKfy92Q2wjxBX3:21 a=X7g00tsEmLOS7x0K:21 a=pILNOxqGKmIA:10 a=7a6K4RaKAAAA:8 a=LpYUZpimDiURvTF5xuIA:9 a=oXt2lh2RHotDM8qC:21 a=_W_S_7VecoQA:10 Subject: Mb vs. MB (Re: NFS reads vs. writes) To: Matt Churchyard , Bruce Evans References: <8291bb85-bd01-4c8c-80f7-2adcf9947366@email.android.com> <5688D3C1.90301@aldan.algebra.com> <495055121.147587416.1451871433217.JavaMail.zimbra@uoguelph.ca> <568A047B.1010000@aldan.algebra.com> <20160105143542.X1191@besplex.bde.org> <568B574A.7010603@aldan.algebra.com> Cc: freebsd-fs From: "Mikhail T." X-Enigmail-Draft-Status: N1110 Message-id: <568BFB63.5090203@aldan.algebra.com> Date: Tue, 05 Jan 2016 12:20:35 -0500 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 In-reply-to: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8BIT X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Jan 2016 17:21:05 -0000 On 05.01.2016 05:45, Matt Churchyard wrote: > You have a different book to most then. > I've always understood 'b' to mean bits, and 'B' to mean bytes. While everyone on here will understand what you were trying to say in context, given purely that number, I would expect most people to interpret it as 90+Mb/s = ~11+MB/s. That is not what you meant, hence why Bruce said be careful with the units. I've always found "megabit" to be a useless unit, owning its entire existence to marketing liars trying to make their wares have more impressive numbers. Unless the conversation is about information theory, or CPU-registers and bitfields, any mention of "bit" is useless and misleading. And then, of course, there is the contention -- by the same liars -- that megabyte is one million bytes. My book ignores them too -- and so does yours, I'm sure. I wish, we agreed on "megabits" being just as useless as, say, a kilomile (kM?). The only good reason -- in my tattered book -- to capitalize the name of a measurement unit is when it is derived from a person's name: Hertz, Ampère, Röntgen, etc. Yours, -mi