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From: Heinz Mauelshagen <heinzm@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Cc: ray@apollo.lv
Subject: Re: [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume
Date: Thu, 17 Mar 2016 15:57:10 +0100	[thread overview]
Message-ID: <56EAC5C6.10301@redhat.com> (raw)
In-Reply-To: <56E9D1D2.8000403@apollo.lv>

On 03/16/2016 10:36 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.

Please provide "lvs -a" and the output of the lvconvert commands to tell 
better what failed here.

Did you check, that your new 2-legged mirror got convert to/from and
that it synced properly?

That said, this is a valid procedure beside using pvmove.

Can't tell what failed w/o further information.

Heinz

>
> 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?
> 2) Is it possible to salvage /dev/varlin/distfiles or I must restore 
> it from backups?
> 3) What I should do now to get system to safe state?
>
>
> Best regards,
> Raimonds Cicans
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

      parent reply	other threads:[~2016-03-17 14:57 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
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 [this message]

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