From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HLAE5-0003SL-SU for qemu-devel@nongnu.org; Sat, 24 Feb 2007 22:39:05 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HLAE3-0003S9-Ff for qemu-devel@nongnu.org; Sat, 24 Feb 2007 22:39:04 -0500 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HLAE3-0003S6-8j for qemu-devel@nongnu.org; Sat, 24 Feb 2007 22:39:03 -0500 Received: from merlin.artenumerica.net ([80.68.90.14]) by monty-python.gnu.org with esmtp (Exim 4.52) id 1HLAE2-0005lP-T5 for qemu-devel@nongnu.org; Sat, 24 Feb 2007 22:39:03 -0500 Message-ID: <45E104D1.5090003@artenumerica.com> Date: Sun, 25 Feb 2007 03:38:57 +0000 From: J M Cerqueira Esteves MIME-Version: 1.0 Subject: Re: [Qemu-devel] QCOW image corruption under QEMU 0.9.0 References: <45DEE9BA.7040202@artenumerica.com> <45E0FA97.3030103@artenumerica.com> In-Reply-To: <45E0FA97.3030103@artenumerica.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: AN support J M Cerqueira Esteves wrote: > Curiously this damaged image file has 4543348736 bytes. > I wonder if there some new bug triggered by the image file size, > for some size around 4500000000 bytes... I have a copy of the disk image file as it was just before starting the qemu run which damaged it, and now I noticed that, during that qemu run, the image file size did not change: 4543348736 bytes. However, comparing both images with cmp -l shows extensive changes. Just an example, from the first bytes (byte number, original value, corrupted value): 1 121 0 2 106 0 3 111 0 4 373 0 8 2 0 24 14 0 28 5 0 39 50 0 47 20 0 52 1 0 55 20 0 60 2 0 1881 0 200 1887 0 40 1889 0 200 1895 0 100 9049 200 0 9054 1 0 9055 220 0 9057 200 0 9061 60 0 9062 115 0 9063 100 0 ... many more zeroed out... 49487 220 0 49569 200 0 49573 325 0 49574 357 0 49575 300 0 49665 0 147 49666 0 145 49667 0 55 49668 0 62 49669 0 56 49670 0 66 49671 0 56 49672 0 61 49673 0 70 49674 0 55 49675 0 63 49676 0 55 49677 0 153 ... many more un-zeroed ... 49853 0 40 49854 0 151 49855 0 163 49856 0 40 49857 200 141 49858 0 166 49859 0 141 49860 0 151 49861 46 154 49862 174 141 49863 140 142 49864 0 154 49865 0 145 ... many more un-zeroed ... 49983 0 142 49984 0 157 49985 200 157 49986 0 164 49987 0 40 49988 0 171 49989 15 157 49990 354 165 49991 200 162 49992 0 40 49993 200 155 49994 0 141 49995 0 143 49996 0 150 49997 16 151 49998 1 156 49999 260 145 50000 0 56 50001 0 12 50002 0 12 ... Best regards J Esteves