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From: Reindl Harald <h.reindl@thelounge.net>
To: Chris Murphy <lists@colorremedies.com>,
	Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: Filesystem corruption on RAID1
Date: Mon, 21 Aug 2017 19:52:17 +0200	[thread overview]
Message-ID: <64b2a9fb-50fc-8d54-d29e-2e372267df4d@thelounge.net> (raw)
In-Reply-To: <CAJCQCtRBe2t=qB8nqbtSKO7vGQz_NiyBSon8JAKKNK0V=sba8w@mail.gmail.com>



Am 21.08.2017 um 19:33 schrieb Chris Murphy:
> On Mon, Aug 21, 2017 at 2:37 AM, Mikael Abrahamsson <swmike@swm.pp.se> wrote:
>> On Sun, 20 Aug 2017, Chris Murphy wrote:
>>
>>> Since md doesn't read from both mirrors, it's possible there's a read from
>>> a non-corrupt drive, which presents good information to fsck, which then
>>> sees no reason to fix anything in that block; but the other mirror does have
>>> corruption which thus goes undetected.
>>
>>
>> That was exactly what I wrote.
>>
>>> One way of dealing with it is to scrub (repair) so they both have the same
>>> information to hand over to fsck. Fixups then get replicated to disks by md.
>>
>>
>> Yes, it is, but that would require a full repair before doing fsck. That
>> seems excessive because that will take hours on larger drives.
> 
> Hence we have ZFS and Btrfs and dm-integrity to unambiguously identify
> corruption and prevent it from escaping to higher levels

where do we have ZFS?
where do we have *stable* BTRFS after Redhat gave up recently?

  reply	other threads:[~2017-08-21 17:52 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-13 15:35 Filesystem corruption on RAID1 Gionatan Danti
2017-07-13 16:48 ` Roman Mamedov
2017-07-13 21:28   ` Gionatan Danti
2017-07-13 21:34     ` Reindl Harald
2017-07-13 22:34       ` Gionatan Danti
2017-07-14  0:32         ` Reindl Harald
2017-07-14  0:52           ` Anthony Youngman
2017-07-14  1:10             ` Reindl Harald
2017-07-14 10:46           ` Gionatan Danti
2017-07-14 10:58             ` Reindl Harald
2017-08-17  8:23             ` Gionatan Danti
2017-08-17 12:41               ` Roger Heflin
2017-08-17 14:31                 ` Gionatan Danti
2017-08-17 17:33                   ` Wols Lists
2017-08-17 20:50                     ` Gionatan Danti
2017-08-17 21:01                       ` Roger Heflin
2017-08-17 21:21                         ` Gionatan Danti
2017-08-17 21:23                           ` Gionatan Danti
2017-08-17 22:51                       ` Wols Lists
2017-08-18 12:26                         ` Gionatan Danti
2017-08-18 12:54                           ` Roger Heflin
2017-08-18 19:42                             ` Gionatan Danti
2017-08-20  7:14                               ` Mikael Abrahamsson
2017-08-20  7:24                                 ` Gionatan Danti
2017-08-20 10:43                                   ` Mikael Abrahamsson
2017-08-20 13:07                                     ` Wols Lists
2017-08-20 15:38                                       ` Adam Goryachev
2017-08-20 15:48                                         ` Mikael Abrahamsson
2017-08-20 16:10                                           ` Wols Lists
2017-08-20 23:11                                             ` Adam Goryachev
2017-08-21 14:03                                               ` Anthony Youngman
2017-08-20 19:11                                           ` Gionatan Danti
2017-08-20 19:03                                         ` Gionatan Danti
2017-08-20 19:01                                       ` Gionatan Danti
2017-08-31 22:55                                     ` Robert L Mathews
2017-09-01  5:39                                       ` Reindl Harald
2017-09-01 23:14                                         ` Robert L Mathews
2017-08-20 23:22                                 ` Chris Murphy
2017-08-21  5:57                                   ` Gionatan Danti
2017-08-21  8:37                                   ` Mikael Abrahamsson
2017-08-21 12:28                                     ` Gionatan Danti
2017-08-21 14:09                                       ` Anthony Youngman
2017-08-21 17:33                                     ` Chris Murphy
2017-08-21 17:52                                       ` Reindl Harald [this message]
2017-07-14  1:48         ` Chris Murphy
2017-07-14  7:22           ` Roman Mamedov

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