From owner-freebsd-current@freebsd.org Tue Oct 20 00:08:03 2015 Return-Path: Delivered-To: freebsd-current@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 07840A19E3D for ; Tue, 20 Oct 2015 00:08:03 +0000 (UTC) (envelope-from yaneurabeya@gmail.com) Received: from mail-qk0-x236.google.com (mail-qk0-x236.google.com [IPv6:2607:f8b0:400d:c09::236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id BBC8315C1 for ; Tue, 20 Oct 2015 00:08:02 +0000 (UTC) (envelope-from yaneurabeya@gmail.com) Received: by qkcy65 with SMTP id y65so661704qkc.0 for ; Mon, 19 Oct 2015 17:08:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=WRnjeoA/Sov33F8lU7Uqpko4sTTXYPHx2E4Fq81tVO4=; b=Jmws0omJ74X7gIPzVT+EMqnCTI5k2NrBOmowmsTrifJCR75zVajH2MGObE2kvOgKJ0 +lmdA9IrqLUAqRM6SG8GCY7I6SNU6NwYmupBiiRFTzxlfQzRWImX6OcyUzvy3C4LvITs RgtxDJYoPKe5aecbMysZ+GntayhvtgKlpLGBbR9AYX36CrchQcbpaaoUhWxaBvBO4wB2 fNfQKcy21kVKSY7VAIF398SNecmyI67+98UEQuQiZ1Sdxiv/PncR4vJbzU39LMDMl2Eb 39zrhawEUf/S0c0skBwHPFVZaXAzC7ImRBcXXzfyA+YKYlXqqOXmGoZBYycuED23USSz wTJQ== MIME-Version: 1.0 X-Received: by 10.55.221.9 with SMTP id n9mr246497qki.64.1445299681802; Mon, 19 Oct 2015 17:08:01 -0700 (PDT) Received: by 10.140.88.209 with HTTP; Mon, 19 Oct 2015 17:08:01 -0700 (PDT) In-Reply-To: <20151019234406.GA88752@cons.org> References: <56237623.5010702@fizk.net> <20151019234406.GA88752@cons.org> Date: Mon, 19 Oct 2015 17:08:01 -0700 Message-ID: Subject: Re: Depreciate and remove gbde From: NGie Cooper To: Martin Cracauer Cc: Yonas Yanfa , FreeBSD Current Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Oct 2015 00:08:03 -0000 On Mon, Oct 19, 2015 at 4:44 PM, Martin Cracauer wrote: > Yonas Yanfa wrote on Sun, Oct 18, 2015 at 06:36:19AM -0400: >> >> Is there any objection to removing gbde? How many people use gbde? When >> have you used gbde over geli, and why? > > You would exclude all current users from accessing their existing > filesystems or whatever they put into that block device. > > A conversion tool would pretty much be forced to use the current > kernel layers (doing the block chaining in userspace would be > annoying), and it would be fundamentally unsafe to have your > half-converted filesystem on disk in case of an interruption. Plus I > think GELI uses a bigger header so you might fall short by a couple of > bytes and you can't do anything about it on the block level with no > access to the filesystem. > > And people might not have their gbde units accessible right now, it > might be on a laptop in a closet on a different continent. For the number of replies Yonas received saying "no, don't do that -- someone might be using it" -- the reason why Yonas asked the question is valid given the information that was presented. 1. Why are there 2 competing technologies? 2. Is one technologically superior to the other (performance, capability, etc)? 3. Is there a gain/loss for removing gbde? 4. Why is it marked experimental [still]? Thanks! -NGie