From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f171.google.com ([209.85.223.171]:34748 "EHLO mail-io0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751879AbbH1PfE (ORCPT ); Fri, 28 Aug 2015 11:35:04 -0400 Received: by iofe124 with SMTP id e124so31526181iof.1 for ; Fri, 28 Aug 2015 08:35:02 -0700 (PDT) Subject: Re: BTRFS errors on fresh filesystem To: J - , "linux-btrfs@vger.kernel.org" References: From: Austin S Hemmelgarn Message-ID: <55E07F8B.6080705@gmail.com> Date: Fri, 28 Aug 2015 11:34:35 -0400 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms000603080106020708080109" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms000603080106020708080109 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-08-28 11:10, J - wrote: > I have noticed a BTRFS error mentioned in two consecutive identical ent= ries in my kernel log: > "BTRFS error (device sda2): bad extent! em: [0 0] passed [0 4096]" > > sda2 contains a btrfs with skinny extents has been created a few days a= go and contains a few subvolumes (mounted as root and home) and subsubvol= umes a few gigabites of data in smallish files. It is mounted with 'rw,re= latime,compress-force=3Dlzo,ssd,space_cache', > > Shortly after noticing the errors, which cannot have been long after th= eir occurrence, I rebooted and ran 'btrfs check' on the filesystem, with = output as follows: > > 'Checking filesystem on /dev/sda2 > UUID: c2c63f52-a322-413f-84f6-b4106fdff8c1 > found 16882602001 bytes used err is 0 > total csum bytes: 15775044 > total tree bytes: 610959360 > total fs tree bytes: 563019776 > total extent tree bytes: 28459008 > btree space waste bytes: 85192798 > file data blocks allocated: 19913826304 > referenced 24478576640 > btrfs-progs v4.1.2' > > After this I ran 'btrfs scrub' which reported no errors. > > The filesystem has been created (and also checked) with Arch Linux, ker= nel 4.1.6, btrfs-progs 4.1.2. > The computer has a AMD FX-8350CPU, 32GB ECC ram, a 990fx chipset and th= e drive is a OCZ Vector 180 (GPT, 2 partition, ESP from 2048s to 1050623s= , .linux partition from 1050624s to 468860175s) I would suggest some serious testing of that OCZ SSD, they are known to=20 have data corruption issues under heavy load or across unclean=20 shutdowns, and these issues will cause problems with any filesystem you=20 put on it. Personally I would not trust an OCZ SSD as anything other=20 than scratch space for testing, and even then would only do so cautiously= =2E --------------ms000603080106020708080109 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 Brgwgga0MIIEnKADAgECAgMQblUwDQYJKoZIhvcNAQENBQAweTEQMA4GA1UEChMHUm9vdCBD QTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNp Z25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcwHhcN MTUwMzI1MTkzNDM4WhcNMTUwOTIxMTkzNDM4WjBjMRgwFgYDVQQDEw9DQWNlcnQgV29UIFVz 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 b20wDQYJKoZIhvcNAQENBQADggIBABr5e8W+NiTER+Q/7wiA2LxWN3UdhT3eZJjqqSlP370P KL5iWqeTfxQ67Ai/mHbJcT2PgAJ+/D2Ji+aRR03UWnU/vtOwzyDLUMstqnfl0Zs+sz/CJe7x nBA5jlpjC2DKuMVfbPze7eySaen7XSGFHKE1QoVIIpQ2kVjC4nbbJQnUbAVX1Iz29WxeVGt9 XYigz3tDPf3tglN+q23E7YjQl4abTIoM7i98yV1H9gfY8lFfKZ6jREB9+n6ie2EwS3Kat2mG tl2wBx4MfRnoSQSKsLKQ5oTwhWf0JqlFwpLfl374p0Njcykej9/jnWG8Ks1V/AXTHqI4eyIP Mf5yMZkPv7n7LS9WWKdG4Nd38iv4T2EiAaWsmgu+r81qL5CJu9AyA0SBS4ttKf6k3e63w2Mv N9R45vpQ3QhAhfWyFxFhZN95APe3YECDG3+XIRJpRYPEtHuIsOyzI70ajF93gg/BidvqKsmV MM2ccktDMfqwZXea6zey7F8Geu9R7BqjXmG2HlNuXu7e/xnHOgXf5D3wPmnRLlBhXL1Ch97a w2KjaupjpAHfFjv5kGnZXN87UvvlwzIZiKXwa3vTDwK+rrKn/sHPkfDZPSiyt/ZBIK6lX83P 34H/CzGg+Kx57rHYOIHGumIvpDa5vfWp8O0sGgawb1C2Aae4sTUVIWmIjVuGI062MYIE0TCC BM0CAQEwgYAweTEQMA4GA1UEChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNl cnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcN AQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxBuVTANBglghkgBZQMEAgMFAKCCAiEwGAYJKoZI hvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTUwODI4MTUzNDM1WjBPBgkq hkiG9w0BCQQxQgRAgohDNzeijPH4v4Uf5I5A3bMEzZhkcQ0CF/r4T+OwWQqwW2Ph7LFE3Gj5 t4x2j6vCkiOCmvluZTltTdanjqLO7zBsBgkqhkiG9w0BCQ8xXzBdMAsGCWCGSAFlAwQBKjAL BglghkgBZQMEAQIwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMA0GCCqGSIb3DQMCAgFA MAcGBSsOAwIHMA0GCCqGSIb3DQMCAgEoMIGRBgkrBgEEAYI3EAQxgYMwgYAweTEQMA4GA1UE ChMHUm9vdCBDQTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlD QSBDZXJ0IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy dC5vcmcCAxBuVTCBkwYLKoZIhvcNAQkQAgsxgYOggYAweTEQMA4GA1UEChMHUm9vdCBDQTEe MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNpZ25p bmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcCAxBuVTAN BgkqhkiG9w0BAQEFAASCAgAF9ExSN8MoJ0EIe63RYSkBSXAVGCmN6rdbGdheEf1mStk5ilEs DfQUwpSEa78T3OPWXykg2DWlM8wLE82Y3m6MhBXIsoDrqBi9PrHifuKVm2hoq/5/yUbSud7+ +gbnzFjOre/7utl3Do7sg0HG9f5JCf9XNYWgheSKJ8GbsmsKrqa6XoPhacj4l6/UXZR9c7Ht nl35XIzF6yH+nMK0VMfjtoKbSINtVhtwGV5P1y4WAurerQJ4ykJvmF+tcl3l5Oa6W0iE+rTQ YzanFJnKKzDQoXivFJArfSzHYx+3p8YbUk9mVObQT6jUZQhBg0Jru2E4cQfbw4f9KmMQFDYh G+Hm/otCmVOYHEQGlHq2jf+6LjLTVRBuO6BqXqpmPekzhYogFtmySlCJ1ejVQCF1Gllk0e++ 6kGKa1SI8otP5mva7Nbq9vPQ/Ol3aJ7WbNw88sWjO5gWDjkTCb+FJd5Eu3eUf6LYY4YODW4B 7ECZEuO6TwMraJEAmM59pXC7so0hr55vF7UGkI8VhbEB9132WhkkotSrIVz57zFB2oi5kOOG +CAFJ+hgKjJtrTrFdmVROGEEfFMvf5xQwGDsqJ3KbttF7mbS0RZyWpmEK4II2SsEjBdSk7G5 /g3WPMTRrWhkyBWUJsFnFYV3in5RHyzpxxWCf4rQNtUL7b/03TPik5kG8QAAAAAAAA== --------------ms000603080106020708080109--