* [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume
@ 2016-03-16 21:36 Raimonds Cicans
2016-03-16 22:00 ` Stuart Gathman
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Raimonds Cicans @ 2016-03-16 21:36 UTC (permalink / raw)
To: linux-lvm
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?
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
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume
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
2016-03-17 14:57 ` Heinz Mauelshagen
2 siblings, 1 reply; 6+ messages in thread
From: Stuart Gathman @ 2016-03-16 22:00 UTC (permalink / raw)
To: linux-lvm
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.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume
2016-03-16 22:00 ` Stuart Gathman
@ 2016-03-16 22:56 ` Raimonds Cicans
0 siblings, 0 replies; 6+ messages in thread
From: Raimonds Cicans @ 2016-03-16 22:56 UTC (permalink / raw)
To: linux-lvm
On 17.03.2016 00:00, Stuart Gathman wrote:
> On 03/16/2016 05:36 PM, Raimonds Cicans wrote:
>> 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.
How do I sync mirror before removing leg? I thought 100 in Cpy%Sync
column mean - everything is in sync.
Best regards,
Raimonds Cicans
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume
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
@ 2016-03-17 7:32 ` Raimonds Cicans
2016-03-20 17:41 ` Raimonds Cicans
2016-03-17 14:57 ` Heinz Mauelshagen
2 siblings, 1 reply; 6+ messages in thread
From: Raimonds Cicans @ 2016-03-17 7:32 UTC (permalink / raw)
To: linux-lvm
On 16.03.2016 23:36, Raimonds Cicans wrote:
> 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
>
>
I made following test:
I unmounted /opt and dumped to files following volumes:
/dev/mapper/varlin-opt
/dev/mapper/varlin-opt_rimage_0
/dev/mapper/varlin-opt_rimage_1
and then diff-ed them.
/dev/mapper/varlin-opt_rimage_0 was not equal with /dev/mapper/varlin-opt.
Why??? I thought 100 in Cpy%Sync column of lvs output mean volume is
fully synchronized.
With "lvconvert -m0" I removed /dev/mapper/varlin-opt_rimage_0 from
/dev/mapper/varlin-opt.
I did some test of volume - everything was normal.
My plan for now:
for each mirrored volume:
1) do volume content backup
2) umount volume
3) run md5sum for volume itself and all mirror sub-volumes
4) with "lvconvert -m0" remove sub-volume which is not equal to volume
5) do some volume tests
6) if something went wrong - restore volume content from backup
7) if on step 4 was removed new RAID md1, then make pvmove to md1
Best regards,
Raimonds Cicans
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume
2016-03-17 7:32 ` Raimonds Cicans
@ 2016-03-20 17:41 ` Raimonds Cicans
0 siblings, 0 replies; 6+ messages in thread
From: Raimonds Cicans @ 2016-03-20 17:41 UTC (permalink / raw)
To: linux-lvm
On 17.03.2016 09:32, Raimonds Cicans wrote:
> On 16.03.2016 23:36, Raimonds Cicans wrote:
>> 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
>>
>>
>
> I made following test:
> I unmounted /opt and dumped to files following volumes:
> /dev/mapper/varlin-opt
> /dev/mapper/varlin-opt_rimage_0
> /dev/mapper/varlin-opt_rimage_1
>
> and then diff-ed them.
>
> /dev/mapper/varlin-opt_rimage_0 was not equal with /dev/mapper/varlin-opt.
> Why??? I thought 100 in Cpy%Sync column of lvs output mean volume is
> fully synchronized.
>
> With "lvconvert -m0" I removed /dev/mapper/varlin-opt_rimage_0 from
> /dev/mapper/varlin-opt.
>
> I did some test of volume - everything was normal.
>
> My plan for now:
> for each mirrored volume:
> 1) do volume content backup
> 2) umount volume
> 3) run md5sum for volume itself and all mirror sub-volumes
> 4) with "lvconvert -m0" remove sub-volume which is not equal to volume
> 5) do some volume tests
> 6) if something went wrong - restore volume content from backup
> 7) if on step 4 was removed new RAID md1, then make pvmove to md1
>
>
Plan failed, because one of sata controllers failed.
I moved all disks to other computer and booted from SystemRescueCD.
All volumes was synced. I checked by md5sum-ing volumes itself an both
their legs.
Then I without problems moved all remaining volumes to new RAID.
So, case is closed.
Best regards,
Raimonds Cicans
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [linux-lvm] lvconvert -m 0 /dev/varlin/distfiles /dev/md0 => zero filled logical volume
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
2016-03-17 7:32 ` Raimonds Cicans
@ 2016-03-17 14:57 ` Heinz Mauelshagen
2 siblings, 0 replies; 6+ messages in thread
From: Heinz Mauelshagen @ 2016-03-17 14:57 UTC (permalink / raw)
To: LVM general discussion and development; +Cc: ray
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/
^ permalink raw reply [flat|nested] 6+ messages in thread
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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
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