Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm 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 Message-ID: <2099.130.240.136.220.1128001761.squirrel@pinus> In-Reply-To: <20050926152748.GK12256@calimero.vinschen.de> References: <3308.130.240.136.220.1127731371.squirrel@pinus> <20050926152748.GK12256@calimero.vinschen.de> Date: Thu, 29 Sep 2005 15:49:21 +0200 (CEST) Subject: Re: Bug in dd ?? at EOM From: "Bengt-Arne Fjellner" To: cygwin@cygwin.com User-Agent: SquirrelMail/1.4.5 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit Corinna Vinschen skrev: > On Sep 26 12:08, Dave Korn wrote: >> ----Original Message---- >> >From: Bengt-Arne Fjellner >> >Sent: 26 September 2005 11:43 >> >> > When using dd with flags conv=noerror,sync >> > It tries reading after the disc ends. >> > >> > This line in cygwin tries reading past end of media: >> > dd if=/dev/sdd of=kkkkkk bs=512 skip=156280250 conv=noerror,sync >> > dd: reading `/dev/sdd': Input/Output error >> > 21120+0 records in >> > 21120+0 records out >> > 10813440 bytes (11 MB) copied, 1.151 seconds, 9.4 MB/s >> > dd: reading `/dev/sdd': Input/Output error >> > 21120+1 records in >> > 21121+0 records out >> > repeats "forever" >> > >> >> > Stops at end of disk. Whos wrong? >> >> There is very definitely a problem with cygwin vs. dd, which I'm >> investigating. I've seen the same thing with CF memory cards, and initially >> thought it was directly related to the memcard driver, but I was becoming >> convinced it's a generic problem with cygwin's readv, and since you've found >> it shows up on hard drives as well, that confirms it for me. I'll get round >> to it late tonight. > > I've applied a patch which tries to workaround the strange behaviour of > Win32 ReadFile when reading beyond EOF. Please give the next developers > snapshot a try. > > > Corinna > Works for me now with latest snapshot. Havent test yet with a failing disk though. Thanks. -- Bengt-Arne Fjellner -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/