X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-2.4 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS X-Spam-Check-By: sourceware.org Message-ID: <4A6E2AB4.8010505@cygwin.com> Date: Mon, 27 Jul 2009 18:31:16 -0400 From: "Larry Hall (Cygwin)" Reply-To: cygwin@cygwin.com User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.21) Gecko/20090320 Remi/2.0.0.21-1.fc8.remi Lightning/0.9 Thunderbird/2.0.0.21 Mnenhy/0.7.5.0 MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: ntfsclone for cygwin 1.7 (issues pointing to shadow copies) References: <8597BF9FDA4DB6469F149F4474790C938F63911563@ipmail.iPremise.local> In-Reply-To: <8597BF9FDA4DB6469F149F4474790C938F63911563@ipmail.iPremise.local> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com On 07/27/2009 05:48 PM, Rob Bosch wrote: > The issue appears to be with ntfsclone in that it must point to > something in /proc/partitions. It will not work with any /cygdrive/X (used > dosdev.c from Corinna and typical vshadow to expose as a drive with no luck). I found > this out by commenting out the read-only check and rebuilding > ntfsclone/ntfsinfo. The code apparently uses a win32_io.c file when building > on cygwin. This file creates its own device mappings (e.g. /dev/hda1 instead > of using the existing /dev/sda1). I guess there would be a way to modify it > to use cygwin devices but I don't know how. > > If shadow copies could be presented as block devices to this library > then it would open up a lot of possibilities for creating block-level clones of > partitions without having to boot to a live CD. I guess it is dd piped > through gzip for now. It sure is a waste when you only have 50GB on a 500GB > drive since dd processes the entire drive. > > Does anyone have anything else to add? I'm guessing not... Not much in the way of specific help, no, but I can make two observations: 1. Using win32_io.c under Cygwin is almost certainly the wrong thing, since you'll then be using Win32isms in an environment built to expect POSIX mechanisms. 2. It looks like /proc/partitions isn't populated, so if /proc/partitions is the only way that ntfsclone expects to be able to find what it wants, then it will be disappointed until a patch is supplied to support this. -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 216 Dalton Rd. (508) 893-9889 - FAX Holliston, MA 01746 _____________________________________________________________________ A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting annoying in email? -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple