From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carsten Aulbert Subject: split brain mode after reboot Date: Tue, 20 Nov 2012 15:08:45 +0100 Message-ID: <50AB8EED.4000005@aei.mpg.de> Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms050303020509080100030305" Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org Cc: "gerrit.kuehn@aei.mpg.de" List-Id: linux-raid.ids This is a cryptographically signed message in MIME format. --------------ms050303020509080100030305 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi all a colleague of mine created a raid 1 on a fairly recent machine Kernel 3.5.0-sabayon mdadm - v3.2.3 - 23rd December 2011 During operation sda seemed to have been disconnected by the system/motherboard/whatever but this was not detected before a reboot was done, after the reboot, sda re-appeared but of course with a much older version of the mirror: Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] md126 : active raid1 sdb1[1] 4194240 blocks [2/1] [_U] md127 : active raid1 sdb3[1] 235808704 blocks [2/1] [_U] md0 : active raid1 sda1[0] 4194240 blocks [2/1] [U_] md1 : active raid0 sda2[0] sdb2[1] 8387584 blocks 512k chunks md2 : active raid1 sda3[0] 235808704 blocks [2/1] [U_] unused devices: As no vital information were on these disks, my question for the list is just if this is an expected/wanted behavior after such an event and what one could do to prevent this (besides monitoring via mdadm). Cheers Carsten --=20 Dr. Carsten Aulbert - Max Planck Institute for Gravitational Physics Callinstrasse 38, 30167 Hannover, Germany phone/fax: +49 511 762-17185 / -17193 https://wiki.atlas.aei.uni-hannover.de/foswiki/bin/view/ATLAS/WebHome --------------ms050303020509080100030305 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIE8DCC BOwwggPUoAMCAQICAkMDMA0GCSqGSIb3DQEBBQUAMDYxCzAJBgNVBAYTAkRFMRMwEQYDVQQK EwpHZXJtYW5HcmlkMRIwEAYDVQQDEwlHcmlkS2EtQ0EwHhcNMTIwNTAyMTQwMjI1WhcNMTMw NjAxMTQwMjI1WjA9MRMwEQYDVQQKEwpHZXJtYW5HcmlkMQwwCgYDVQQLEwNBRUkxGDAWBgNV BAMTD0NhcnN0ZW4gQXVsYmVydDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAOuh d5sXP9180l8F34z/ywkRt/cVUoZjHh4bumhIZbz8O+PQ6QDI8mbgFwoDPQAmmEs4lKV8F0Ur gRls+gEob+JybAepOFiZVa1YnLRnnvNcpKwi0fs7MIpvqUxCacIcc63UTD8A4/1N74zE2KpZ g1TDqaW5ypQpKk9bUXBnhrg19j5PN1Ch2DRPO9jzJXW13uRL1OfNoOZoANHheegtfCj1mwzp 2naGvZea0EpqndKfUUHBrg9OQIwQJemXhWiJzJMv27l93+uSfvy2zvNXgXDFZr40p33Vx07C OD8UI0vela6idGxzwJ74aoQpvp7dSUEIgVFCgXCCXgvY/FxXk6UCAwEAAaOCAfswggH3MAwG A1UdEwEB/wQCMAAwDgYDVR0PAQH/BAQDAgSwMB0GA1UdDgQWBBSFaeVx9/3sSuG3fOgfU56/ LWDaKzAfBgNVHSMEGDAWgBTGdckorNEL/Dz/ubUe0187gGISNDAlBgNVHREEHjAcgRpDYXJz dGVuLkF1bGJlcnRAYWVpLm1wZy5kZTAcBgNVHRIEFTATgRFncmlka2EtY2FAa2l0LmVkdTA1 BgNVHR8ELjAsMCqgKKAmhiRodHRwOi8vZ3JpZC5memsuZGUvY2EvZ3JpZGthLWNybC5kZXIw KAYDVR0gBCEwHzAPBg0rBgEEAZQ2qywBAQEHMAwGCiqGSIb3TAUCAgEwEQYJYIZIAYb4QgEB BAQDAgWgME4GCWCGSAGG+EIBDQRBFj9DZXJ0aWZpY2F0ZSBpc3N1ZWQgdW5kZXIgQ1AvQ1BT IHYuIDEuNyBhdCBodHRwOi8vZ3JpZC5memsuZGUvY2EwJAYJYIZIAYb4QgECBBcWFWh0dHA6 Ly9ncmlkLmZ6ay5kZS9jYTAzBglghkgBhvhCAQgEJhYkaHR0cDovL2dyaWQuZnprLmRlL2Nh L2dyaWRrYS1jcHMucGRmMDMGCWCGSAGG+EIBAwQmFiRodHRwOi8vZ3JpZC5memsuZGUvY2Ev Z3JpZGthLWNybC5kZXIwDQYJKoZIhvcNAQEFBQADggEBABK8nPkhGS1HzzGlCfI5CaFT19za d0H3tGc5OueBHxBO8DWyB3M1v1YyaOEDEvkL1Y1+RDAnYvoXgvgBQnGMWuy4SEnMpm1wIIMs pFM1Q1pPqJ+GdwYdmkwkVy4fs8TkDAy6AYkoGa7Cnxai1KlLHtxCS26uIiUcEhSmdMZOQT4w rYbtX1mQGZpg4BJ8YgjP1oazYCiHaQcumVYSOHb+HJQuAy35eBr6/82OHrF28V+UoN9EYuU7 1RqAS9dtP6i7z34V7Tlx0zyzL99IyF5ZZMF6a18q7K9jrkXlTRYYcpGMMeH51XGe5hB1az5o fR7i8PzrlBwH5cn5BHDfjWHbcOgxggLOMIICygIBATA8MDYxCzAJBgNVBAYTAkRFMRMwEQYD VQQKEwpHZXJtYW5HcmlkMRIwEAYDVQQDEwlHcmlkS2EtQ0ECAkMDMAkGBSsOAwIaBQCgggFn MBgGCSqGSIb3DQEJAzELBgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTEyMTEyMDE0MDg0 NVowIwYJKoZIhvcNAQkEMRYEFHl1FeHsCoOxydFKMi7M0fvR5GtOMEsGCSsGAQQBgjcQBDE+ MDwwNjELMAkGA1UEBhMCREUxEzARBgNVBAoTCkdlcm1hbkdyaWQxEjAQBgNVBAMTCUdyaWRL YS1DQQICQwMwTQYLKoZIhvcNAQkQAgsxPqA8MDYxCzAJBgNVBAYTAkRFMRMwEQYDVQQKEwpH ZXJtYW5HcmlkMRIwEAYDVQQDEwlHcmlkS2EtQ0ECAkMDMGwGCSqGSIb3DQEJDzFfMF0wCwYJ YIZIAWUDBAEqMAsGCWCGSAFlAwQBAjAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYI KoZIhvcNAwICAUAwBwYFKw4DAgcwDQYIKoZIhvcNAwICASgwDQYJKoZIhvcNAQEBBQAEggEA 0klT3gQQMBzh57fpTP8PEPgX+3EY+TK/E4XiCjS/lspmB8b5NbY+oS8s7PB/jNmwlL9Kg+fy aYhvhlKp4gzWl7q1BhoZcMFFckp4+XAww0J8gZ5WK372tSNY3SIffMEgwUlmwbxbp6A9xq8B PLHgx/aPGvpDyBVpR/tfvpE3OGJNM0wL8m5Z0pa+OzyVHSSqhvj+6nxz0ZzbcrXswQLqJqZB gOKg4cy4Ny19aIer7A/+b30pjJKqJgetVs9YWwDAszEDUij9gtaDSK6RqEE4z+bDdyMEHqYu /TF+LKOCxu32cTlzYa0YcnX3B+2fY/KIXGSQMCIzMd6m1TJYDajqewAAAAAAAA== --------------ms050303020509080100030305--