Hi Eric, Am Donnerstag, den 26.07.2018, 13:56 +0000 schrieb Eric Robinson: > Would there really be a PV signature on the backing device? I didn't turn md4 > into a PV (did not run pvcreate /dev/md4), but I did turn the drbd disk into > one (pvcreate /dev/drbd1).
both DRBD and mdraid put their metadata at the end of the block device, thus depending on LVM configuration, both mdraid backing devices as well as DRBD minors bcking VM disks with direct-on-disk PVs might be detected as PVs. It is very advisable to set lvm.conf's global_filter to allow only the desired devices as PVs by matching a strict regexp, and to ignore all other devices, e.g.: global_filter = [ "a|^/dev/md.*$|", "r/.*/" ] or even more strict: global_filter = [ "a|^/dev/md4$|", "r/.*/" ] After editing the configuration, you might want to regenerate your distro's initrd/initramfs to reflect the changes directly at startup. Best regards, // Veit _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user