I'm trying to configure lvm2 on top of drbd. I've configured drbd (/dev/drbd0 and /dev/drbd1) and put them as primary node, but when I try to create a physical volume this is what it does happens
Physical volume "/dev/drbd0" successfully created
--- NEW Physical volume ---
PV Name /dev/md4
PV Size 129,45 GB
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID MtxjHy-8zfW-i9nq-TJA4-b6F9-jtcW-FkanLB
/dev/md4 is the raid device over was configured drbd0.
Why /dev/md4 it's taken as PV Name?
Thanks in advance