From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Buckingham Subject: Re: [Fwd: Re: mdadm: spare rebuilding] Date: Thu, 03 Jul 2008 08:10:26 +0100 Message-ID: <486C7B62.1@blueyonder.co.uk> References: <486A7974.4070204@blueyonder.co.uk> <55776.192.168.1.70.1214992071.squirrel@neil.brown.name> Reply-To: jbuckingham@blueyonder.co.uk Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms080609040205070002020802" Return-path: In-Reply-To: <55776.192.168.1.70.1214992071.squirrel@neil.brown.name> Sender: linux-raid-owner@vger.kernel.org To: NeilBrown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids This is a cryptographically signed message in MIME format. --------------ms080609040205070002020802 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Neil So, a little while ago I did upgrade the kernel (2.6.22.18-0.2-default), but it did not seem to make any difference to the 'echo sync > /sys/block/md3/md/sync_action'. After receiving your latest email, I did the following... echo sync > /sys/block/md3/md/sync_action (device busy reported to konsole as before) echo idle > /sys/block/md3/md/sync_action echo sync > /sys/block/md3/md/sync_action (device busy reported to konsole as before) Then checked "top" - and saw significant activity from md3_sync and md3_raid5 processes. Also cat /proc/mdstat showed that a resync was actively happening, and sure enough, after a couple of hours I now have 4 active devices in the array! So I suspect a combination of the new kernel and the "idle" sorted the problem, whatever it was. Thanks! And thanks for writing mdadm and for your support. Jon B NeilBrown wrote: > On Wed, July 2, 2008 4:37 am, Jon Buckingham wrote: >> Hi Neil - any thoughts on how I can debug/fix this? > > Sorry for the slow responses - I seem to have been very busy lately. > > No, unmount isn't needed. > I cannot really imagine what is happening. > Maybe write "idle" to the sync_action file first, then try > "sync", but that seems unlikely. > > Maybe unmount, stop the array, > echo 0 > /sys/modules/md-mod/paramters/start_ro > and assemble that array again > mdadm -A /dev/md3 /dev/sd[abcd]4 > and see if that helps. > > Maybe try a newer kernel if that is an option. > > NeilBrown > >> Thanks >> >> Jon B >> >> -------- Original Message -------- >> Subject: Re: mdadm: spare rebuilding >> Date: Sat, 28 Jun 2008 20:42:56 +0100 >> From: Jon Buckingham >> Reply-To: jbuckingham@blueyonder.co.uk >> To: Neil Brown >> CC: linux-raid@vger.kernel.org >> References: <48615EE7.7000502@blueyonder.co.uk> >> <18532.47293.808234.949005@notabene.brown> >> >> Neil Brown wrote: >>> Maybe a bug that has since been fixed. >>> What happens if you >>> echo sync > /sys/block/md3/md/sync_action >>> ?? >>> >> nas:~ # echo sync > /sys/block/md3/md/sync_action >> -bash: echo: write error: Device or resource busy >> >> Should I unmount first? >> Any other info? >> >> Thanks >> >> Jon B >> >> >> > > > --------------ms080609040205070002020802 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJLzCC AvIwggJboAMCAQICED+2nVJ0BG6weLaGhJbjTK4wDQYJKoZIhvcNAQEFBQAwYjELMAkGA1UE BhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBDb25zdWx0aW5nIChQdHkpIEx0ZC4xLDAqBgNVBAMT I1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBJc3N1aW5nIENBMB4XDTA4MDMxNzIwNDcyM1oX DTA5MDMxNzIwNDcyM1owTjEfMB0GA1UEAxMWVGhhd3RlIEZyZWVtYWlsIE1lbWJlcjErMCkG CSqGSIb3DQEJARYcamJ1Y2tpbmdoYW1AYmx1ZXlvbmRlci5jby51azCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMpt089Gj6mNQnCzJzLATutrPfBKs8EgZz+I0Id+fiiwSCbp zDnOay4itz4EyXgsUw/zcZyMNwT+JJQiznaSlHagGZs5AiA059yvLuLb6C0FrMOFjpREHJDf mdA6lSEeNjCHUEPNkvZvrAapQdK2QtCQhJcoacYAy97+FLSOaRlFO99Ggq6/ROvF2SU2kPQj omE5t3uOHtm4GbGblbwaUztHFWB7d6WKyLJF8AeDHSKVqBMd1I4JhttdZsTz6lLc6csVB+do 6+EYWkrttS14Nyprw91a9OxtY6m8zFBNgQR460IvdEmCwHdTF4krE0LSTVXRvyrmvpdz3oN2 HVBGlY0CAwEAAaM5MDcwJwYDVR0RBCAwHoEcamJ1Y2tpbmdoYW1AYmx1ZXlvbmRlci5jby51 azAMBgNVHRMBAf8EAjAAMA0GCSqGSIb3DQEBBQUAA4GBAAq+YglaqniAq4ToNKx/yTvPTdT3 eo34CLo1IoYz5b0e23QgiOxPWdahf59uxytDE0oq9GGj4HvrQazG9oKd+pEMikT9FJnIrjRW 02jCYrO90/060ovsQX1KPYpSC9WtCLQlg7LRmq9a8sYkbpbu/qx5KdtixduIs/ZyPV5ZyOcW MIIC8jCCAlugAwIBAgIQP7adUnQEbrB4toaEluNMrjANBgkqhkiG9w0BAQUFADBiMQswCQYD VQQGEwJaQTElMCMGA1UEChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UE AxMjVGhhd3RlIFBlcnNvbmFsIEZyZWVtYWlsIElzc3VpbmcgQ0EwHhcNMDgwMzE3MjA0NzIz WhcNMDkwMzE3MjA0NzIzWjBOMR8wHQYDVQQDExZUaGF3dGUgRnJlZW1haWwgTWVtYmVyMSsw KQYJKoZIhvcNAQkBFhxqYnVja2luZ2hhbUBibHVleW9uZGVyLmNvLnVrMIIBIjANBgkqhkiG 9w0BAQEFAAOCAQ8AMIIBCgKCAQEAym3Tz0aPqY1CcLMnMsBO62s98EqzwSBnP4jQh35+KLBI JunMOc5rLiK3PgTJeCxTD/NxnIw3BP4klCLOdpKUdqAZmzkCIDTn3K8u4tvoLQWsw4WOlEQc kN+Z0DqVIR42MIdQQ82S9m+sBqlB0rZC0JCElyhpxgDL3v4UtI5pGUU730aCrr9E68XZJTaQ 9COiYTm3e44e2bgZsZuVvBpTO0cVYHt3pYrIskXwB4MdIpWoEx3UjgmG211mxPPqUtzpyxUH 52jr4RhaSu21LXg3KmvD3Vr07G1jqbzMUE2BBHjrQi90SYLAd1MXiSsTQtJNVdG/Kua+l3Pe g3YdUEaVjQIDAQABozkwNzAnBgNVHREEIDAegRxqYnVja2luZ2hhbUBibHVleW9uZGVyLmNv LnVrMAwGA1UdEwEB/wQCMAAwDQYJKoZIhvcNAQEFBQADgYEACr5iCVqqeICrhOg0rH/JO89N 1Pd6jfgIujUihjPlvR7bdCCI7E9Z1qF/n27HK0MTSir0YaPge+tBrMb2gp36kQyKRP0Umciu NFbTaMJis73T/TrSi+xBfUo9ilIL1a0ItCWDstGar1ryxiRulu7+rHkp22LF24iz9nI9XlnI 5xYwggM/MIICqKADAgECAgENMA0GCSqGSIb3DQEBBQUAMIHRMQswCQYDVQQGEwJaQTEVMBMG A1UECBMMV2VzdGVybiBDYXBlMRIwEAYDVQQHEwlDYXBlIFRvd24xGjAYBgNVBAoTEVRoYXd0 ZSBDb25zdWx0aW5nMSgwJgYDVQQLEx9DZXJ0aWZpY2F0aW9uIFNlcnZpY2VzIERpdmlzaW9u MSQwIgYDVQQDExtUaGF3dGUgUGVyc29uYWwgRnJlZW1haWwgQ0ExKzApBgkqhkiG9w0BCQEW HHBlcnNvbmFsLWZyZWVtYWlsQHRoYXd0ZS5jb20wHhcNMDMwNzE3MDAwMDAwWhcNMTMwNzE2 MjM1OTU5WjBiMQswCQYDVQQGEwJaQTElMCMGA1UEChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0 eSkgTHRkLjEsMCoGA1UEAxMjVGhhd3RlIFBlcnNvbmFsIEZyZWVtYWlsIElzc3VpbmcgQ0Ew gZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMSmPFVzVftOucqZWh5owHUEcJ3f6f+jHuy9 zfVb8hp2vX8MOmHyv1HOAdTlUAow1wJjWiyJFXCO3cnwK4Vaqj9xVsuvPAsH5/EfkTYkKhPP K9Xzgnc9A74r/rsYPge/QIACZNenprufZdHFKlSFD0gEf6e20TxhBEAeZBlyYLf7AgMBAAGj gZQwgZEwEgYDVR0TAQH/BAgwBgEB/wIBADBDBgNVHR8EPDA6MDigNqA0hjJodHRwOi8vY3Js LnRoYXd0ZS5jb20vVGhhd3RlUGVyc29uYWxGcmVlbWFpbENBLmNybDALBgNVHQ8EBAMCAQYw KQYDVR0RBCIwIKQeMBwxGjAYBgNVBAMTEVByaXZhdGVMYWJlbDItMTM4MA0GCSqGSIb3DQEB BQUAA4GBAEiM0VCD6gsuzA2jZqxnD3+vrL7CF6FDlpSdf0whuPg2H6otnzYvwPQcUCCTcDz9 reFhYsPZOhl+hLGZGwDFGguCdJ4lUJRix9sncVcljd2pnDmOjCBPZV+V2vf3h9bGCE6u9uo0 5RAaWzVNd+NWIXiC3CEZNd4ksdMdRv9dX2VPMYIDZDCCA2ACAQEwdjBiMQswCQYDVQQGEwJa QTElMCMGA1UEChMcVGhhd3RlIENvbnN1bHRpbmcgKFB0eSkgTHRkLjEsMCoGA1UEAxMjVGhh d3RlIFBlcnNvbmFsIEZyZWVtYWlsIElzc3VpbmcgQ0ECED+2nVJ0BG6weLaGhJbjTK4wCQYF Kw4DAhoFAKCCAcMwGAYJKoZIhvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcN MDgwNzAzMDcxMDI2WjAjBgkqhkiG9w0BCQQxFgQUGhVJP9m/I/Cm01hsGaPaUhW0PRAwUgYJ KoZIhvcNAQkPMUUwQzAKBggqhkiG9w0DBzAOBggqhkiG9w0DAgICAIAwDQYIKoZIhvcNAwIC AUAwBwYFKw4DAgcwDQYIKoZIhvcNAwICASgwgYUGCSsGAQQBgjcQBDF4MHYwYjELMAkGA1UE BhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBDb25zdWx0aW5nIChQdHkpIEx0ZC4xLDAqBgNVBAMT I1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBJc3N1aW5nIENBAhA/tp1SdARusHi2hoSW40yu MIGHBgsqhkiG9w0BCRACCzF4oHYwYjELMAkGA1UEBhMCWkExJTAjBgNVBAoTHFRoYXd0ZSBD b25zdWx0aW5nIChQdHkpIEx0ZC4xLDAqBgNVBAMTI1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFp bCBJc3N1aW5nIENBAhA/tp1SdARusHi2hoSW40yuMA0GCSqGSIb3DQEBAQUABIIBAInoMT6d rwWkeXHoXATOPLM8RpCStfadj/+Pvyax3vVmUNoTFzjo5rk4eho+7j0MCjLQIh7yEmbcu7Pq n1XUe4dZfHQ0EkPXL1TEhtUtfft1Gbt5Ckdzqq66D+Bd34B+/v9GwvfN5yLknFPfyTe8DUKS UC7e8vpYGOasz+DDgMvXLPaW766e9fc2LeYUFTLmuaDHYyH6RK4Gcz73DTSUowpLHuJ0brcJ cH+s6A8x9i0/Z6VRT7XDAkRMqzFMyIKabGeysIRfgQ8Eq0MDDb3LfhtoVYh/Bd3iT/Fur/BD 4cg9VCnlNclVK2Lsmwc61yWMVj71mYMn/4CR/5lFeqU8QvcAAAAAAAA= --------------ms080609040205070002020802--