Re: Disks renamed after update to 'testing'...?

From	Andy Smith <andy@strugglers.net>
Newsgroups	linux.debian.user
Subject	Re: Disks renamed after update to 'testing'...?
Date	2020-08-21 00:00 +0200
Message-ID	<AG0Lf-4Fq-5@gated-at.bofh.it> (permalink)
References	(1 earlier) <AFE81-7Xs-3@gated-at.bofh.it> <AFNuF-5fj-1@gated-at.bofh.it> <AFUPw-1d5-13@gated-at.bofh.it> <AFZvP-40t-1@gated-at.bofh.it> <AG0rT-4yU-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

Hello,

On Thu, Aug 20, 2020 at 05:30:20PM -0400, Dan Ritter wrote:
> David Christensen wrote: 
> > Some people have mentioned md RAID.  tomas has mentioned LUKS.  I believe
> > both of them add checksums to the contained contents.  So, bit-rot within a
> > container should be caught by the container driver.
> 
> This is incorrect. The systems that checksum every write and
> recalculate and match on every read are BTRFS and ZFS.
> 
> LVM, LUKS, and mdadm do not.

Indeed, although dm-integrity can now be used with LUKS (with or
without encryption) to add checksums that force a read error when
they don't match. When there is redundancy (e.g. LVM or MD) a read
can then come from a good copy and the bad copy will be repaired.

Here is a practical example:

    https://gist.github.com/MawKKe/caa2bbf7edcc072129d73b61ae7815fb

I haven't yet used it in production but if anyone has I would be
really interested to see a with and without comparison of
performance.

Cheers,
Andy

-- 
https://bitfolk.com/ -- No-nonsense VPS hosting

Thread

Disks renamed after update to 'testing'...? "hobie of RMN" <hobie@rumormillnews.com> - 2020-08-18 01:50 +0200
  Re: Disks renamed after update to 'testing'...? David Christensen <dpchrist@holgerdanske.com> - 2020-08-18 03:30 +0200
    Re: Disks renamed after update to 'testing'...? "hobie of RMN" <hobie@rumormillnews.com> - 2020-08-18 06:10 +0200
      Re: Disks renamed after update to 'testing'...? john doe <johndoe65534@mail.com> - 2020-08-18 08:40 +0200
        Re: Disks renamed after update to 'testing'...? didier gaumet <didier.gaumet@gmail.com> - 2020-08-18 10:30 +0200
          Re: Disks renamed after update to 'testing'...? Nicolas George <george@nsup.org> - 2020-08-18 11:40 +0200
            Re: Disks renamed after update to 'testing'...? "Thomas Schmitt" <scdbackup@gmx.net> - 2020-08-18 12:20 +0200
          Re: Disks renamed after update to 'testing'...? "Thomas Schmitt" <scdbackup@gmx.net> - 2020-08-18 11:40 +0200
      Re: Disks renamed after update to 'testing'...? David Christensen <dpchrist@holgerdanske.com> - 2020-08-18 12:10 +0200
  Re: Disks renamed after update to 'testing'...? "Rick Thomas" <rick.thomas@pobox.com> - 2020-08-18 10:40 +0200
    Re: Disks renamed after update to 'testing'...? Urs Thuermann <urs@isnogud.escape.de> - 2020-08-18 20:40 +0200
      Re: Disks renamed after update to 'testing'...? David Christensen <dpchrist@holgerdanske.com> - 2020-08-18 22:00 +0200
        Re: Disks renamed after update to 'testing'...? Urs Thuermann <urs@isnogud.escape.de> - 2020-08-19 08:10 +0200
          Re: Disks renamed after update to 'testing'...? David Christensen <dpchrist@holgerdanske.com> - 2020-08-19 10:40 +0200
            Re: Disks renamed after update to 'testing'...? Urs Thuermann <urs@isnogud.escape.de> - 2020-08-19 12:10 +0200
              Re: Disks renamed after update to 'testing'...? David Christensen <dpchrist@holgerdanske.com> - 2020-08-19 23:50 +0200
                Re: Disks renamed after update to 'testing'...? <tomas@tuxteam.de> - 2020-08-20 09:50 +0200
                Re: Disks renamed after update to 'testing'...? Joe <joe@jretrading.com> - 2020-08-20 12:20 +0200
                Re: Disks renamed after update to 'testing'...? rhkramer@gmail.com - 2020-08-20 17:40 +0200
                Re: Disks renamed after update to 'testing'...? David Christensen <dpchrist@holgerdanske.com> - 2020-08-20 22:40 +0200
                Re: Disks renamed after update to 'testing'...? Dan Ritter <dsr@randomstring.org> - 2020-08-20 23:40 +0200
                Re: Disks renamed after update to 'testing'...? Andy Smith <andy@strugglers.net> - 2020-08-21 00:00 +0200
                Re: Disks renamed after update to 'testing'...? David Christensen <dpchrist@holgerdanske.com> - 2020-08-21 11:50 +0200
                Re: Disks renamed after update to 'testing'...? <tomas@tuxteam.de> - 2020-08-21 10:40 +0200
      Re: Disks renamed after update to 'testing'...? Urs Thuermann <urs@isnogud.escape.de> - 2020-08-19 09:00 +0200

csiph-web