From: Stuart Gathman <stuart@gathman.org>
To: linux-lvm@redhat.com
Subject: Re: [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume
Date: Wed, 16 Mar 2016 18:00:16 -0400 [thread overview]
Message-ID: <56E9D770.7070406@gathman.org> (raw)
In-Reply-To: <56E9D1D2.8000403@apollo.lv>
On 03/16/2016 05:36 PM, Raimonds Cicans wrote:
> Hello.
>
> I am trying to move LVM setup from old RAID md0 to new RAID md1
>
> I did "lvconvert -m 1 /dev/path/to/logical_volume /dev/md1" on bunch
> of logical volumes.
> Everything went without problems.
>
> Then I tried to remove md0 from one of logical volumes by running
> command:
> lvconvert -m 0 /dev/varlin/distfiles /dev/md0
>
> I tried to mount this logical volume, but failed.
>
> Then I checked first megabyte of logical volume it was zero filled.
>
> Partial output of "lvs -o+devices":
> LV VG Attr LSize Pool Origin Data% Meta%
> Move Log Cpy%Sync Convert Devices
> backup varlin -wi-ao---- 100,00g
> /dev/md0(6304)
> backup varlin -wi-ao---- 100,00g
> /dev/md0(8544)
> data varlin -wi-ao---- 20,00g
> /dev/md0(28384)
> distfiles varlin -wi-a----- 20,00g
> /dev/md1(2738)
> ftp varlin rwi-aor--- 10,00g 100,00
> ftp_rimage_0(0),ftp_rimage_1(0)
> ftpdown varlin rwi-aor--- 10,00g 100,00
> ftpdown_rimage_0(0),ftpdown_rimage_1(0)
>
>
> lvm2: 2.02.116
> kernel: 4.4.2
>
>
> Questions:
>
> 1) What I did wrong?
I would have used pvmove. Using lvconvert, I think you needed to sync
the mirrors before removing a leg.
> 2) Is it possible to salvage /dev/varlin/distfiles or I must restore
> it from backups?
Use the metdata backups (/etc/lvm) to restore lvm to before you removed md0.
> 3) What I should do now to get system to safe state?
The system is probably fine - you just removed you data.
next prev parent reply other threads:[~2016-03-16 22:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-16 21:36 [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume Raimonds Cicans
2016-03-16 22:00 ` Stuart Gathman [this message]
2016-03-16 22:56 ` Raimonds Cicans
2016-03-17 7:32 ` Raimonds Cicans
2016-03-20 17:41 ` Raimonds Cicans
2016-03-17 14:57 ` Heinz Mauelshagen
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