From owner-freebsd-hackers@freebsd.org Wed Jul 22 21:08:38 2015 Return-Path: Delivered-To: freebsd-hackers@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 1F7819A870C; Wed, 22 Jul 2015 21:08:38 +0000 (UTC) (envelope-from dieterbsd@gmail.com) Received: from mail-ie0-x22d.google.com (mail-ie0-x22d.google.com [IPv6:2607:f8b0:4001:c03::22d]) (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 E40D2121A; Wed, 22 Jul 2015 21:08:37 +0000 (UTC) (envelope-from dieterbsd@gmail.com) Received: by iebmu5 with SMTP id mu5so176876874ieb.1; Wed, 22 Jul 2015 14:08:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=qn7iZ4+OdmcVtT8/ptX9VGB5otf01eqiJ4fG3gRKVG8=; b=UdOPsea3nb6DHkBoO00v+v2F6NHDjcN4mJsxOaHpg4MkJ8u8VAeiW6y1d6G3+sUwFT cHO1zpwyLe1oNtK3KpzemrbWiKvHSHxMMJtErM9H03xSRLosmoyy7nDYN/QV1K2cIy2r zXf7GQMu+/0jO/eIs/MSDaotgXeTU3ZaHR+GFgUoXjaOWhV6/npHy3208l20g2Dsr1q1 H2usvWsLVTpr9thZsAnDmT/pU7pC5DWwoWtMPU6FAK+1iPyX56R/2Au+VeEYiep/K8Q+ mJph0bnggk0T52cXxlzfZbu3c3HrIQ0PKrJOdnybMxWH8BGDDu+RVkoNIMLLiamDivWM +A3w== MIME-Version: 1.0 X-Received: by 10.50.44.8 with SMTP id a8mr9359395igm.70.1437599317104; Wed, 22 Jul 2015 14:08:37 -0700 (PDT) Received: by 10.64.2.132 with HTTP; Wed, 22 Jul 2015 14:08:37 -0700 (PDT) Date: Wed, 22 Jul 2015 14:08:37 -0700 Message-ID: Subject: Re: format/newfs larger external consumer drives From: Dieter BSD To: freebsd-hackers@freebsd.org, freebsd-fs@freebsd.org Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 Jul 2015 21:08:38 -0000 Don whY asks: > So, fsck's effort (and execution *time*) is based *mostly* on inodes? I don't know about *mostly*, but reducing the number of inodes significantly reduced fsck time for me. > In my case, there isn't any real physical room for an internal disk. > I'm using Dell FX160's -- they'll support a SATA laptop drive Assuming that "SATA laptop drive" means 2.5" form factor, just add a 6 TB SSD. (available this month, but the price is top secret) > The point is to get rid of the piles of CD/DVD media that I've > accumulated over the years Someone must make a jukebox for those. >> I am very tired of having an entire machine panic just because >> one disk decided to take a nap. This is not how you get 5 9s. :-( > > Or, power glitches, firmware bugs, etc. A UPS eats power glitches for breakfast. Firmware is a problem. More and more mainboards can have FLOSS firmware, but there is also buggy firmware in disks and other devices. Warren helpfully pointed us to > http://sourceforge.net/projects/fuse-ufs2/ Thanks, Warren! Sourceforge was kaput when I tried to check it out. I'm hoping that it is a high quality implementation, and, being fuse, will solve the kernel panic problem. I plan to look at the filesystem regression tests and see if I can think up any additional test cases. Chris H typed: > For the record, SourceForge hasn't been available for quite > some time. Slashdot reports: The short version is that a storage fault led to significant filesystem corruption, and we had to restore a massive amount of data from backups. There's a post at the SourceForge blog going into a bit more detail, and describing the steps our Siteops team took (and is still taking) to restore service. http://sourceforge.net/blog/sourceforge-infrastructure-and-service-restoration/ Last time I looked, some (not all) parts of fuse-ufs2 had recovered. > I thought this (fuse-ufs2) might be a nice addition to the ports > tree, and was hoping to put it there. Sounds good.