LVM grabbed the device before DRBD got to it.
If you have VGs on drbd resources, you need a filter so the raw device
doesn't get mounted at boot time. It works before laying down the VG,
because at boot the VG doesn't exist. After you have configured logical
volumes on the drbd resource, on the next boot LVM takes them over before
DRBD can get them.
There are some device name filters needed in the configuration (Don't know
the specifics, I've not done this. You show the file -
/etc/lvm/lvm.conf - but all lines are commented out!) that will skip the
/dev/mdx as candidates for VGs, allow DRBD to get at them and create the
drbd resources.
Your data is probably fine, but on which node?
Yes,my all data are ok on the first node.
Piotr
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