From owner-freebsd-current@FreeBSD.ORG Thu May 24 09:04:16 2012 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 17254106566B for ; Thu, 24 May 2012 09:04:16 +0000 (UTC) (envelope-from dfr@rabson.org) Received: from mail-qc0-f182.google.com (mail-qc0-f182.google.com [209.85.216.182]) by mx1.freebsd.org (Postfix) with ESMTP id BD3428FC08 for ; Thu, 24 May 2012 09:04:15 +0000 (UTC) Received: by qcsg15 with SMTP id g15so6847387qcs.13 for ; Thu, 24 May 2012 02:04:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:x-gm-message-state; bh=Ouo6C4clHaue6YzUcMcAGTSbdjMsn+LKcJZVMuOMbug=; b=ns0+KaENFuer0Y1cfI+jkY5aFkI8jgmfMrajPSYDg4XCH/aAoCGyRdgU6IFayVL51i zEu8gN3WYROJAuw367z4OuQmYqwq48onhwjib+6fvW0vVcWLFZjT2YUZrF8P207XVpka x/DwXt+k13w8vrLaen17rxrJQOR9Nc2yOr4HKvdHHK0A6K352i/Awy0h8QfJFt8oizAz Bt+5Rok/yNNGcHzjxdBuhEPNwvLuxOyg/svQPQwgxXrs5foKOQFyeg02E+U8rB8rCiei N948C+Nej8tqoLZIqdKNZ8pMGIh0PPdpAHAcKcQn0//lJ9MfKnVS7HKTJ0rELhMNSA5w Chgw== MIME-Version: 1.0 Received: by 10.224.17.210 with SMTP id t18mr9532956qaa.93.1337850254985; Thu, 24 May 2012 02:04:14 -0700 (PDT) Received: by 10.229.28.139 with HTTP; Thu, 24 May 2012 02:04:14 -0700 (PDT) In-Reply-To: <1239922227.20120524120421@serebryakov.spb.ru> References: <38A5BC8F-A8FB-4371-AB1D-9548F5957254@lists.zabbadoz.net> <20120523131046.GC2358@deviant.kiev.zoral.com.ua> <12410676034.20120524013853@serebryakov.spb.ru> <8D72700F5CA4461BAD1C98908689CB9E@multiplay.co.uk> <1239922227.20120524120421@serebryakov.spb.ru> Date: Thu, 24 May 2012 10:04:14 +0100 Message-ID: From: Doug Rabson To: lev@freebsd.org X-Gm-Message-State: ALoCoQlrj84KwsDRf3yEkQcTmXIsT94KbAOuAvgtcb2efz7aoHBGGu0FZXlHit3KuaRT0UUvHvDI Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-current FreeBSD , Steven Hartland Subject: Re: UFS+J panics on HEAD X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Thu, 24 May 2012 09:04:16 -0000 If all you are doing is reading, the ZFS on-disk format is well documented and fairly easy to work with. Take a look at the ZFS bootloader code - that implements a ZFS reader in not too many lines of code and could easily be re-purposed for a recovery tool. On 24 May 2012 09:04, Lev Serebryakov wrote: > Hello, Steven. > You wrote 24 =D0=BC=D0=B0=D1=8F 2012 =D0=B3., 1:58:48: > > SH> While it might be a shame to see FFS go by the wayside are there any > SH> big reasons why you would rather stick with FFS instead of moving > SH> to ZFS with all the benefits that brings? > I afraid, that after real hardware failure (like real HDD death, > not these pseudo-broken-hardware situations, when HDDs is perfectly > alive and in good condition), all data will be lost. I could restore > data from remains of FFS by hands (format is straightforward and > well-known), but ZFS is different story... > > And all these messages about panics after pool import... Yes, it > could be result of REAL hardware problems, but I want to have some > hope to restore some of the data after such crashes. > > Yes, backups is solution, but I don't have money to buy (reliable) > hardware to backup 4Tb of data :( > > I attended "Solaris internals" 5-days training four years ago (when I > worked for Sun Microsystems), and instructor says same words... > > > -- > // Black Lion AKA Lev Serebryakov > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= " >