From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailgw-02.dd24.net ([193.46.215.43]:58517 "EHLO mailgw-02.dd24.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750863AbcFAWZj (ORCPT ); Wed, 1 Jun 2016 18:25:39 -0400 Received: from mailpolicy-01.live.igb.homer.key-systems.net (mailpolicy-02.live.igb.homer.key-systems.net [192.168.1.27]) by mailgw-02.dd24.net (Postfix) with ESMTP id C23AD5FB0E for ; Wed, 1 Jun 2016 22:25:36 +0000 (UTC) Received: from mailgw-02.dd24.net ([192.168.1.36]) by mailpolicy-01.live.igb.homer.key-systems.net (mailpolicy-02.live.igb.homer.key-systems.net [192.168.1.25]) (amavisd-new, port 10236) with ESMTP id JMreI7Ru49cp for ; Wed, 1 Jun 2016 22:25:34 +0000 (UTC) Received: from heisenberg.fritz.box (ppp-46-244-216-200.dynamic.mnet-online.de [46.244.216.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mailgw-02.dd24.net (Postfix) with ESMTPSA for ; Wed, 1 Jun 2016 22:25:34 +0000 (UTC) Message-ID: <1464819934.6742.71.camel@scientia.net> Subject: raid5/6 production use status? From: Christoph Anton Mitterer To: linux-btrfs@vger.kernel.org Date: Thu, 02 Jun 2016 00:25:34 +0200 Content-Type: multipart/signed; micalg="sha-512"; protocol="application/x-pkcs7-signature"; boundary="=-jPSVAYny0nH3S/VmUZpM" Mime-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org List-ID: --=-jPSVAYny0nH3S/VmUZpM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hey. I've lost a bit track recently and the wiki changelog doesn't seem to contain much about how things went on at the RAID5/6 front... so how're things going? Is it already more or less "productively" usable? What's still missing? I guess there still aren't any administrative tools that e.g. monitor for failed disks or block errors? Does that RAID5/6 itself work already? Is it possible to replace broken devices (or such with block errors)? Are things like a completely failing disk (during fs being online) handled gracefully? How about scrubbing/repairing... I assume on read it would identify silent block errors by the checksum[0] and rebuild it if possible, doing what when it fails? Just giving read errors? Marking the btrfs RAID failed and remounting the fs read-only? Cheers & thx, Chris. [0] Except of course for the nodatacow case, which, albeit a major case, unfortunately still seems to lack the important checksumming support :-( --=-jPSVAYny0nH3S/VmUZpM Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCCEmow ggXiMIIDyqADAgECAhBctkhuRwyYxn/2gNtkSuKNMA0GCSqGSIb3DQEBCwUAMH0xCzAJBgNVBAYT AklMMRYwFAYDVQQKEw1TdGFydENvbSBMdGQuMSswKQYDVQQLEyJTZWN1cmUgRGlnaXRhbCBDZXJ0 aWZpY2F0ZSBTaWduaW5nMSkwJwYDVQQDEyBTdGFydENvbSBDZXJ0aWZpY2F0aW9uIEF1dGhvcml0 eTAeFw0xNTEyMTYwMTAwMDVaFw0zMDEyMTYwMTAwMDVaMHUxCzAJBgNVBAYTAklMMRYwFAYDVQQK Ew1TdGFydENvbSBMdGQuMSkwJwYDVQQLEyBTdGFydENvbSBDZXJ0aWZpY2F0aW9uIEF1dGhvcml0 eTEjMCEGA1UEAxMaU3RhcnRDb20gQ2xhc3MgMiBDbGllbnQgQ0EwggEiMA0GCSqGSIb3DQEBAQUA A4IBDwAwggEKAoIBAQDuD1CMlQkjhKz1UGqP1jeiTiH9MgllRz6vOPrVG/eE0H/J4QQLV/PeL8RT 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