udev db as zkabelac says; or sysfs .../dm/uuid; or dm ioctl lookup by name or major:minor and get uuid (dmsetup info equivalent) then check for mpath prefix on the uuid [Assuming it was created with the standard tools] Alasdair -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
