From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f49.google.com ([209.85.192.49]:35510 "EHLO mail-qg0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751403AbbJEMa3 (ORCPT ); Mon, 5 Oct 2015 08:30:29 -0400 Received: by qgt47 with SMTP id 47so147485107qgt.2 for ; Mon, 05 Oct 2015 05:30:28 -0700 (PDT) Received: from [127.0.0.1] (rrcs-70-62-41-24.central.biz.rr.com. [70.62.41.24]) by smtp.googlemail.com with ESMTPSA id q140sm11121382qha.5.2015.10.05.05.30.26 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 05 Oct 2015 05:30:26 -0700 (PDT) To: linux-btrfs From: Austin S Hemmelgarn Subject: Issues with unmountable BTRFS raid1 filesystem Message-ID: <56126D59.7070505@gmail.com> Date: Mon, 5 Oct 2015 08:30:17 -0400 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms030206000005070308080905" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms030206000005070308080905 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable I've been having issues recently with a relatively simple setup using a=20 two device BTRFS raid1 on top of two two device md RAID0's, and every=20 time I've rebooted since starting trying to use this particular=20 filesystem, I've found it unable to mount and had to recreate it from=20 scratch. This is more of an inconvenience than anything else (while I=20 don't have backups of it, all the data is trivial to recreate (in fact,=20 so trivial that doing backups would be more effort than just recreating=20 the data by hand)), but it's still something that I would like to try=20 and fix. First off, general info: Kernel version: 4.2.1-local+ (4.2.1 with minor modifications, sources=20 can be found here: https://github.com/ferroin/linux) Btrfs-progs version: 4.2 I would post output from btrfs fi show, but that's spouting obviously=20 wrong data (it's saying I'm using only 127MB with 2GB of allocations on=20 each 'disk', I had been storing approximately 4-6GB of actual data on=20 the filesystem). This particular filesystem is composed of BTRFS raid1 across two LVM=20 managed DM/MD RAID0 devices, each of which spans 2 physical hard drives. = I have a couple of other filesystems with the exact same configuration = that have not ever displayed this issue. When I run 'btrfs check' on the filesystem when it refuses to mount, I=20 get a number of lines like the following: bad metadata [, ) crossing stripe boundary followed eventually by: Errors found in extent allocation tree or chunk allocation As is typical of a failed mount, dmesg shows a 'failed to read the=20 system array on ' 'open_ctree failed'. I doubt that this is a hardware issue because: 1. Memory is brand new, and I ran a 48 hour burn-in test that showed no=20 errors. 2. A failing storage controller, PSU, or CPU would be manifesting with=20 many more issues than just this. 3. A disk failure would mean that two different disks, from different=20 manufacturing lots, are encountering errors on exactly the same LBA's at = exactly the same time, which while possible is astronomically unlikely=20 for disks bigger than a few hundred gigabytes (the disks in question are = 1TB each). --------------ms030206000005070308080905 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC Brgwgga0MIIEnKADAgECAgMRLfgwDQYJKoZIhvcNAQENBQAweTEQMA4GA1UEChMHUm9vdCBD QTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNp Z25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcwHhcN MTUwOTIxMTEzNTEzWhcNMTYwMzE5MTEzNTEzWjBjMRgwFgYDVQQDEw9DQWNlcnQgV29UIFVz ZXIxIzAhBgkqhkiG9w0BCQEWFGFoZmVycm9pbjdAZ21haWwuY29tMSIwIAYJKoZIhvcNAQkB FhNhaGVtbWVsZ0BvaGlvZ3QuY29tMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA nQ/81tq0QBQi5w316VsVNfjg6kVVIMx760TuwA1MUaNQgQ3NyUl+UyFtjhpkNwwChjgAqfGd LIMTHAdObcwGfzO5uI2o1a8MHVQna8FRsU3QGouysIOGQlX8jFYXMKPEdnlt0GoQcd+BtESr pivbGWUEkPs1CwM6WOrs+09bAJP3qzKIr0VxervFrzrC5Dg9Rf18r9WXHElBuWHg4GYHNJ2V Ab8iKc10h44FnqxZK8RDN8ts/xX93i9bIBmHnFfyNRfiOUtNVeynJbf6kVtdHP+CRBkXCNRZ qyQT7gbTGD24P92PS2UTmDfplSBcWcTn65o3xWfesbf02jF6PL3BCrVnDRI4RgYxG3zFBJuG qvMoEODLhHKSXPAyQhwZINigZNdw5G1NqjXqUw+lIqdQvoPijK9J3eijiakh9u2bjWOMaleI SMRR6XsdM2O5qun1dqOrCgRkM0XSNtBQ2JjY7CycIx+qifJWsRaYWZz0aQU4ZrtAI7gVhO9h pyNaAGjvm7PdjEBiXq57e4QcgpwzvNlv8pG1c/hnt0msfDWNJtl3b6elhQ2Pz4w/QnWifZ8E BrFEmjeeJa2dqjE3giPVWrsH+lOvQQONsYJOuVb8b0zao4vrWeGmW2q2e3pdv0Axzm/60cJQ haZUv8+JdX9ZzqxOm5w5eUQSclt84u+D+hsCAwEAAaOCAVkwggFVMAwGA1UdEwEB/wQCMAAw VgYJYIZIAYb4QgENBEkWR1RvIGdldCB5b3VyIG93biBjZXJ0aWZpY2F0ZSBmb3IgRlJFRSBo ZWFkIG92ZXIgdG8gaHR0cDovL3d3dy5DQWNlcnQub3JnMA4GA1UdDwEB/wQEAwIDqDBABgNV HSUEOTA3BggrBgEFBQcDBAYIKwYBBQUHAwIGCisGAQQBgjcKAwQGCisGAQQBgjcKAwMGCWCG SAGG+EIEATAyBggrBgEFBQcBAQQmMCQwIgYIKwYBBQUHMAGGFmh0dHA6Ly9vY3NwLmNhY2Vy dC5vcmcwMQYDVR0fBCowKDAmoCSgIoYgaHR0cDovL2NybC5jYWNlcnQub3JnL3Jldm9rZS5j cmwwNAYDVR0RBC0wK4EUYWhmZXJyb2luN0BnbWFpbC5jb22BE2FoZW1tZWxnQG9oaW9ndC5j b20wDQYJKoZIhvcNAQENBQADggIBADMnxtSLiIunh/TQcjnRdf63yf2D8jMtYUm4yDoCF++J jCXbPQBGrpCEHztlNSGIkF3PH7ohKZvlqF4XePWxpY9dkr/pNyCF1PRkwxUURqvuHXbu8Lwn 8D3U2HeOEU3KmrfEo65DcbanJCMTTW7+mU9lZICPP7ZA9/zB+L0Gm1UNFZ6AU50N/86vjQfY WgkCd6dZD4rQ5y8L+d/lRbJW7ZGEQw1bSFVTRpkxxDTOwXH4/GpQfnfqTAtQuJ1CsKT12e+H NSD/RUWGTr289dA3P4nunBlz7qfvKamxPymHeBEUcuICKkL9/OZrnuYnGROFwcdvfjGE5iLB kjp/ttrY4aaVW5EsLASNgiRmA6mbgEAMlw3RwVx0sVelbiIAJg9Twzk4Ct6U9uBKiJ8S0sS2 8RCSyTmCRhJs0vvva5W9QUFGmp5kyFQEoSfBRJlbZfGX2ehI2Hi3U2/PMUm2ONuQG1E+a0AP u7I0NJc/Xil7rqR0gdbfkbWp0a+8dAvaM6J00aIcNo+HkcQkUgtfrw+C2Oyl3q8IjivGXZqT 5UdGUb2KujLjqjG91Dun3/RJ/qgQlotH7WkVBs7YJVTCxfkdN36rToPcnMYOI30FWa0Q06gn F6gUv9/mo6riv3A5bem/BdbgaJoPnWQD9D8wSyci9G4LKC+HQAMdLmGoeZfpJzKHMYIE0TCC BM0CAQEwgYAweTEQMA4GA1UEChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNl cnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcN AQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxEt+DANBglghkgBZQMEAgMFAKCCAiEwGAYJKoZI hvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTUxMDA1MTIzMDE3WjBPBgkq hkiG9w0BCQQxQgRA/fdh9Jq/2g/y9W6inMlu6MpPgIHq6OnpDXWeuwsMP+ioPslbd3bgMmR+ lNC/NRx4PvFlrGvd0DiUxpHgpiTKVjBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjAL BglghkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFA MAcGBSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGRBgkrBgEEAYI3EAQxgYMwgYAweTEQMA4GA1UE ChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlD QSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy dC5vcmcCAxEt+DCBkwYLKoZIhvcNAQkQAgsxgYOggYAweTEQMA4GA1UEChMHUm9vdCBDQTEe MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25p bmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxEt+DAN BgkqhkiG9w0BAQEFAASCAgBRhQvZ5xTrFvI+xttFepMjT35jv6JkWbaoTmFW+2WhNxiIfyz5 9vcXbzyU2F+89oGoQvXM37chmAvmGm3wedWp0nmLk6HGJdxvB3Q72z3xnbZ1jd44F0EVc8Eh M+Pe5xkZY+g0T6hbmb0d/x5yp+dRttCMQ06IkfrlbBRZ8ivxc9e/i262DOn6mNR2c8he0vIu 6v6vhfWArJ2ZBzhwWfqQ2fyXetF01yDvt+3LNhyL1TMHdAuvqRxP0833/N4OSYJH7FJJcLXQ 5LxwqgZgZH+Ytd3qpAhYd9o1r6Qa0hPA6/uPNyfJIFSWdV3TrnTiXSCzQLj5ZGD/4AfMwZ1O QQBZ5uzRRrE7VYv4xqprg+0HlsDB5nM7gotvR6SQs9XZgmED1jVllk08iRbH5ULgKXdC+u/t hbw4AkKKRaGnsnPku4S4ZzrWxXd2f5Avb9KMhv7mfDuZRwj14jw7PU4gj/YuwaRXE0jr8Frb vz3Dq0KIoC/xWQ5ZkVHKpo4+Yg9nJD5dxFEiFNbM+7AItZyL4V8B8hyWeAjGL+jfzsFAABzZ mIOeChEuFkyEPTSVYo2f/8yJRosCygTPeuTCwfQX+Vapa+h4lAKHexNr2CwrZDdLdNoi19Sy uhgUoXVOHfJew65pUPc1fcyKKFj5uyLv0VhBwQQI/YBHXQEU/SRwAnugeAAAAAAAAA== --------------ms030206000005070308080905--