How to reliably mount UDF partition with /etc/fstab

My HDD Disk /dev/sdb: 927.5 GiB, 995875618816 bytes, 1945069568 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0xc4094bc2 Device Boot Start End Sectors Size Id Type /dev/sdb1 2048 718847 716800 350M c W95 FAT32 (LBA) /dev/sdb2 718848 269154303 268435456 128G 7 HPFS/NTFS/exFAT /dev/sdb4 269156350 1945067519 1675911170 799.1G f W95 Ext'd (LBA) /dev/sdb5 403374080 1945067519 1541693440 735.1G 6 FAT16 /dev/sdb6 269156352 403374079 134217728 64G 83 Linux I have formatted /dev/sdb5 as udf with mkfs.udf --utf8 -l UDFStore /dev/sdb5 on Gentoo. But blkid doesn't list /dev/sdb5. How can I reliably mount my UDF partition at startup in /etc/fstab when device enumeration changes due to additional connected USB devices at startup.