Hi, just to leave in some visible place this experiment if some is interested. My idea: remove archiso_early hook, and take the advantage of symlink /dev/disk/by-label/XYZ created by 60-persistent-storage.rules installed via udev hook, without doing other tricks. Result: * OK: when booting in cdrom mode. * FAIL: when booting in disk mode. The reason is because hybrid mode (via isohybrid). * The LABEL is defined at first sector of iso "sda" (simulate a MBR) also there is a fake partition "sda1" (with offset 1 [+512 bytes ahead of sda]) so you can create another partitions on the destination media. * When mount the UDF filesystem, sda is mounted and not sda1 (sda1 is just a fake part to avoid overwriting data). * There is a udev rule at 60-persistent-storage.rules that make all parent (sda in this case) ID_* env data available to childrens (sda1 in this case), so sda1 inherits the LABEL, and this data is not overwrited because blkid fail (remember sda1 is not a real partition) Consequence: * /dev/disk/by-label/XYZ points to /dev/sda1 instead of /dev/sda. (when isohybrid offset > 0) What works: * if offset = 0 will works, but doing this we lost the capability of create another partitions in the medium that .iso is copied (USB media) * Also works on real partition scheme (usb drive with the real MBR, and real partiton with label) * As said before if boot as cdrom. Conclusion: * Keep with archiso_early, that is pretty simple and does not require other tools [#1] If some is interested in changes for your personal usage, the patch is here [#2] [#1] http://bugs.archlinux.org/task/18523 [mkinitcpio] usb_id, ata_id, scsi_id, path_id: should be added to udev install hook? [#2] https://gist.github.com/1f6f5a67008bf3b927ee -- Gerardo Exequiel Pozzi ( djgera ) http://www.djgera.com.ar KeyID: 0x1B8C330D Key fingerprint = 0CAA D5D4 CD85 4434 A219 76ED 39AB 221B 1B8C 330D