Hi, do the hybrid ISOs of debian-cd and debian-live depend on blkid properly detecting the ISO 9660 filesystem on the base device (/dev/srN, /dev/sdX) ? Does any other Debian software depend on this detection ?
If so, then trouble is at the horizon by https://github.com/karelzak/util-linux/commit/7ef86a08914427d6486734614d7d3bbed1f108fe This causes Fedora ISOs to fail booting from /dev/srN https://bugzilla.redhat.com/show_bug.cgi?id=1783066 because the /dev/disk/by-label/ link is not created by udev. The commit shall obviously heal a shortcomming of the old questionable udev rule # for partitions import parent information ENV{DEVTYPE}=="partition", IMPORT{parent}="ID_*" when it meets a USB stick with an ISO on the base device and a partition which has no own filesystem. The effect on /dev/srN is obviously unintended. To my theory, libblkid detects the partition table on the DVD and bets that the Linux kernel will create partition devices. But with /dev/srN there will no partition devices be created. I also expect grub-mkrescue ISOs to show no ISO 9660 at all, because they get a MBR partition starting at disk block 1 in the BIOS-only case, and a GPT with no ISO 9660 partition in the EFI-case. The only way to access their ISO filesystems is via the base device. The change is not yet in https://sources.debian.org/src/util-linux/2.34-0.1/libblkid/src/superblocks/iso9660.c/ Can we warn the maintainer in advance ? Have a nice day :) Thomas
