> looks like you try to mount empty disk that has not registered in udisks2 The dvdr has data on it. > can you mount from the command line? only as root and I need to specify a mount point. the other doesn't need root or a mount point. > does same disk mounts in the other device? Yes. > do all disks in sr1 not mount? you mention specific as user Yes. If I reverse the order. For example, turn on optical drive "a" second, make it "b" (sr1), it exhibits the same behavior (can't mount). sr0, always works as expected. sr1 doesn't. Kate