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Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: question to btrfs scrub Content-Language: en-US To: Bernd Lentes , Qu Wenruo , Remi Gauvin , linux-btrfs References: <8a3d7ad6-0ddb-3160-eece-8d6228b9c0a6@gmx.com> <3d208b62-efc2-afe4-e928-986dc4c53936@gmx.com> <80136f6f-0575-58e8-ea8d-7053c8af4db0@suse.com> <743f92ee-19e8-ba45-0426-795a91fc0e0b@georgianit.com> <00c1ea17-680f-18a0-d40a-f36bcdb9101d@gmx.com> From: Qu Wenruo In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SI2PR01CA0048.apcprd01.prod.exchangelabs.com (2603:1096:4:193::17) To AS8PR04MB8465.eurprd04.prod.outlook.com (2603:10a6:20b:348::19) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8PR04MB8465:EE_|PAXPR04MB8175:EE_ X-MS-Office365-Filtering-Correlation-Id: 715b5fe5-742e-4943-4a16-08db7f715764 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AS8PR04MB8465.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(376002)(366004)(39860400002)(396003)(346002)(136003)(451199021)(31686004)(6666004)(6486002)(478600001)(110136005)(66574015)(2616005)(83380400001)(36756003)(31696002)(86362001)(3480700007)(2906002)(186003)(53546011)(6506007)(966005)(6512007)(38100700002)(66556008)(66476007)(66946007)(41300700001)(316002)(8936002)(8676002)(5660300002)(518174003)(45980500001)(43740500002);DIR:OUT;SFP:1101; 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Bernd Lentes >> ; Qu Wenruo ; >> linux-btrfs >> Subject: Re: question to btrfs scrub > > >> I hate to point my finger to btrfs itself, but I still remember in the old days >> some workload can lead to such false alerts. >> But I can not recall which commit is causing and which one is fixing the >> problem. >> >> Another concern is, the report is using SINGLE for data, which is completely >> fine, but it doesn't help us to determine if it's really a hardware data >> corruption or btrfs bugs. >> >> If the report is using RAID1, and those corruption are all repairable, then we're >> pretty sure it's data corruption on disk. >> Or if all mirrors are corrupted in a RAID1* config, then we know it's definitely >> btrfs causing the problem. >> >> But with SINGLE profile, it's really hard to say. > > The server we are talking about is still in testing, not in production. > That means we can change the config. > Should we take RAID1 into account ? Personally speaking, with your hardware I already believe it's not hardware causing the corruption. But it can be extra safe if you go RAID1 for data, and re-test the workload. If the corruption still happens, it's almost sure it's btrfs to blame. Thanks, Qu > We have enough disk space. > > Bernd > > Helmholtz Zentrum München – Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH) > Ingolstädter Landstraße 1, D-85764 Neuherberg, https://www.helmholtz-munich.de > Geschäftsführung: Prof. Dr. med. Dr. h.c. Matthias Tschöp, Daniela Sommer (komm.) | Aufsichtsratsvorsitzende: MinDir’in Prof. Dr. Veronika von Messling > Registergericht: Amtsgericht München HRB 6466 | USt-IdNr. DE 129521671