[linux-lvm] Bug with converting a large mirror to raid1

[SPUeNTRUP - Kai Henningsen]

Hello,

I have some trouble converting a large (approx. 2TiB) mirrored partition to raid1. It
worked just fine with a small partition (after I reduced the big one by
1 GB to allow for the rmeta partitions).

I first tried this using the standard Ubuntu lvm2, then compiled a
newer version myself; no dice. (The following is without any -R
options, but adding those seems to make no difference whatsoever.)
(From googling, the root problem is that this needs a bigger
region_size so as to not create more regions than MD can cope with.)

My next plan is to take away one hd's mirror partition, create a new
one-hd raid1 partition, move the data, drop the remaining mirrored
partition, and create a second partition for the raid1 ...

Attached are the logs from

log {
file="/tmp/lvm2.log"
level=7
activation=1
}

The _log it complains about is the former log conf, renamed so I'd not
lose it.

Hope that's enough info.

# more /sys/block/sd?/device/model
::::::::::::::
/sys/block/sda/device/model
::::::::::::::
WDC WD20EZRX-00D
::::::::::::::
/sys/block/sdb/device/model
::::::::::::::
ST2000DM001-1E61
# pvs
PV VG Fmt Attr PSize PFree
/dev/sda5 lisbeth0 lvm2 a-- 1,82t 1,00g
/dev/sdb5 lisbeth0 lvm2 a-- 1,82t 1,00g
# vgs
VG #PV #LV #SN Attr VSize VFree
lisbeth0 2 5 0 wz--n- 3,64t 2,00g
# lvs
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
data lisbeth0 mwi-aom-- 1,80t 100,00
data_mlog lisbeth0 mwa-a-m-- 4,00m 100,00
root lisbeth0 rwi-aor-- 17,63g 100,00
swap_1 lisbeth0 -wi-ao--- 1012,00m
swap_2 lisbeth0 -wi-ao--- 1012,00m
#


* Ubuntu 14.04.1 version

# lvconvert --version
LVM version: 2.02.98(2) (2012-10-15)
Library version: 1.02.77 (2012-10-15)
Driver version: 4.27.0
# lvconvert --type raid1 lisbeth0/data
device-mapper: reload ioctl on failed: Das Argument ist ungÃŒltig
Failed to suspend lisbeth0/data before committing changes
Device '/dev/sda5' has been left open.
Device '/dev/sdb5' has been left open.
Device '/dev/sdb5' has been left open.
Device '/dev/sda5' has been left open.
Device '/dev/sdb5' has been left open.
Device '/dev/sda5' has been left open.
#


* Self-compiled version from
https://git.fedorahosted.org/cgit/lvm2.git/snapshot/lvm2-2_02_114.tar.xz

# lvconvert --version
Configuration section "_log" unknown.
LVM version: 2.02.114(2)-git (2014-11-28)
Library version: 1.02.92-git (2014-11-28)
Driver version: 4.27.0
# lvconvert --type raid1 lisbeth0/data
Configuration section "_log" unknown.
device-mapper: reload ioctl on failed: Das Argument ist ungÃŒltig
Failed to lock logical volume lisbeth0/data.
#

Mit freundlichen GrÌßen aus MÃŒnster /
with kind regards - Kai Henningsen
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