Return-Path: X-Original-To: apmail-db-derby-user-archive@www.apache.org Delivered-To: apmail-db-derby-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 852A79913 for ; Fri, 27 Jan 2012 14:47:37 +0000 (UTC) Received: (qmail 89487 invoked by uid 500); 27 Jan 2012 14:47:37 -0000 Delivered-To: apmail-db-derby-user-archive@db.apache.org Received: (qmail 89433 invoked by uid 500); 27 Jan 2012 14:47:36 -0000 Mailing-List: contact derby-user-help@db.apache.org; run by ezmlm Precedence: bulk list-help: list-unsubscribe: List-Post: List-Id: Reply-To: "Derby Discussion" Delivered-To: mailing list derby-user@db.apache.org Received: (qmail 89426 invoked by uid 99); 27 Jan 2012 14:47:36 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 27 Jan 2012 14:47:36 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of lists@nabble.com designates 216.139.236.26 as permitted sender) Received: from [216.139.236.26] (HELO sam.nabble.com) (216.139.236.26) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 27 Jan 2012 14:47:30 +0000 Received: from isper.nabble.com ([192.168.236.156]) by sam.nabble.com with esmtp (Exim 4.72) (envelope-from ) id 1Rqn54-0000WP-Mx for derby-user@db.apache.org; Fri, 27 Jan 2012 06:47:10 -0800 Message-ID: <33214577.post@talk.nabble.com> Date: Fri, 27 Jan 2012 06:47:10 -0800 (PST) From: Mojo Nixon To: derby-user@db.apache.org Subject: Really Strange Database Corruption. Help! MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: steve.b.ferguson@gmail.com I recently received a database from a user. They said they were viewing a record in the application, and went back to open it a bit later and the record was gone. In the database the record is indeed gone, but when I look at the table .dat file in a binary editor, I can see the record information! So I have the following questions: - How could this happen? The table is corrupt, but the database continues to function? - Is there any way to get the record back? - Are there any derby tools for this sort of forensic recovery of records, like some low level tools that can read and dump what is in a single dat file? - Could it just be an issue of the record being deleted? They insist they did not, but you know users... Thanks for any advice. -- View this message in context: http://old.nabble.com/Really-Strange-Database-Corruption.-Help%21-tp33214577p33214577.html Sent from the Apache Derby Users mailing list archive at Nabble.com.