On Thu 07 Mar 2019 at 23:12:29 (+0100), Pascal Hambourg wrote: > Le 07/03/2019 à 20:23, David Wright a écrit : > > > > A filesystem > > that has a label, has that label regardless of any OS. > > Have you ever used UDF ?
Yes. As far as my experience goes, there's not a lot of difference. I've had no occasion to *write* DVDs on a computer system, so I can only speak of reading them. /dev/disk/by-id: lrwxrwxrwx 1 root root 9 Mar 7 19:31 usb-HL-DT-ST_DVDRAM_SP60NB50_KZ5E19K3606-0:0 -> ../../sr0 /dev/disk/by-label: lrwxrwxrwx 1 root root 9 Mar 7 19:31 DVD_VR -> ../../sr0 /dev/disk/by-path: lrwxrwxrwx 1 root root 9 Mar 7 19:31 pci-0000:00:14.0-usb-0:2:1.0-scsi-0:0:0:0 -> ../../sr0 /dev/disk/by-uuid: lrwxrwxrwx 1 root root 9 Mar 7 19:31 2055-06-04-17-19-32-00 -> ../../sr0 # mount /dev/sr0 /mnt mount: /dev/sr0 is write-protected, mounting read-only # umount /mnt # mount -L DVD_VR /mnt mount: /dev/sr0 is write-protected, mounting read-only # blkid -L DVD_VR /dev/sr0 # blkid -U 2055-06-04-17-19-32-00 /dev/sr0 # $ lsblk -f NAME FSTYPE LABEL UUID MOUNTPOINT […] sr0 udf DVD_VR 2055-06-04-17-19-32-00 /mnt $ > It has a set of identifiers, and I observed > that Windows and blkid did not use the same identifier as the label. I've made no claim about what Windows and blkid do and do not use. I wouldn't know how Windows mounts/unmounts them. I think DOS used to display the UUIDs, but it's been a long time … (Did I ever feed a DVD to DOS? Probably not.) The LABELs on these DVDs are not particularly useful as they were written, I assume, by the DVD recorder that burned them, and they're all the same. The UUIDs vary, but the identification I actually use is what I wrote on them with a pen. Distinguishing them when inside the drive hasn't seemed particularly important. I have a few "bought" DVDs, but like most people, I suspect, I just look at the box and physical labels to see what's on them. I'm told that some people examine the markings on them to see where they were manufactured, … but now I'm rambling. Cheers, David.
