From: Lukasz Florczak <lukasz.florczak@linux.intel.com>
To: Marc MERLIN <marc@merlins.org>
Cc: linux-raid@vger.kernel.org
Subject: Re: Is it correct that raid5 cannot be converted from Consistency Policy: bitmap to ppl?
Date: Mon, 4 Jul 2022 10:43:23 +0200 [thread overview]
Message-ID: <b72376$g5buij@orsmga003-auth.jf.intel.com> (raw)
In-Reply-To: <20220703200741.GA3138296@merlins.org>
On Sun, 3 Jul 2022 13:07:41 -0700, Marc MERLIN <marc@merlins.org> wrote:
> Is there any way around this, or not without a full reformat/rebuild?
>
Hi,
I've been able to change the consistency using mdadm v4.2 on a imsm
container. I don't know if it will work for native metadata. Hope this
helps you a little.
The steps I did it:
1. Stop the volume
# mdadm -S /dev/md/<volume_name>
2. Update to ppl
# mdadm --update-subarray=0 --update=ppl /dev/md/<container_name>
3. Assemble incrementally
# mdadm --incremental /dev/md/<container_name>
Thanks,
Lukasz
> gargamel:~# mdadm --query --detail /dev/md5
> /dev/md5:
> Version : 1.2
> Creation Time : Tue Jan 21 10:35:52 2014
> Raid Level : raid5
> Array Size : 15627542528 (14903.59 GiB 16002.60 GB)
> Used Dev Size : 3906885632 (3725.90 GiB 4000.65 GB)
> Raid Devices : 5
> Total Devices : 5
> Persistence : Superblock is persistent
>
> Intent Bitmap : Internal
>
> Update Time : Sun Jul 3 03:02:01 2022
> State : active, checking
> Active Devices : 5
> Working Devices : 5
> Failed Devices : 0
> Spare Devices : 0
>
> Layout : left-symmetric
> Chunk Size : 512K
>
> Consistency Policy : bitmap
>
> Check Status : 99% complete
>
> Name : gargamel.svh.merlins.org:5 (local to host
> gargamel.svh.merlins.org) UUID : ec672af7:a66d9557:2f00d76c:38c9f705
> Events : 642977
>
> Number Major Minor RaidDevice State
> 0 8 193 0 active sync /dev/sdm1
> 6 8 177 1 active sync /dev/sdl1
> 2 8 209 2 active sync /dev/sdn1
> 3 8 1 3 active sync /dev/sda1
> 5 8 17 4 active sync /dev/sdb1
> gargamel:~# mdadm --grow --consistency-policy=ppl /dev/md5
> mdadm: Current consistency policy is bitmap, cannot change to ppl
>
> Kernel 5.16.
>
> Thanks,
> Marc
> --
> "A mouse is a device used to point at the xterm you want to type in"
> - A.S.R.
> Home page: http://marc.merlins.org/ | PGP
> 7F55D5F27AAF9D08
prev parent reply other threads:[~2022-07-04 8:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-03 20:07 Is it correct that raid5 cannot be converted from Consistency Policy: bitmap to ppl? Marc MERLIN
2022-07-03 21:20 ` Wols Lists
2022-07-04 8:43 ` Lukasz Florczak [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='b72376$g5buij@orsmga003-auth.jf.intel.com' \
--to=lukasz.florczak@linux.intel.com \
--cc=linux-raid@vger.kernel.org \
--cc=marc@merlins.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.