Hello, There is another issue with offset 1. This does not happen with offset 0. My scenario: * 2G USB key * isohybrid -offset 1 * another primary partition created (also is the same issue happens with a logical part instead) # mount /dev/sdc2 /home/hola mount: /dev/sdc2 already mounted or /home/hola busy ** strace shows: mount("/dev/sdc2", "/home/hola/", "ext2", MS_MGC_VAL, NULL) = -1 EBUSY (Device or resource busy) # mkfs.ext2 /dev/sdc2 mke2fs 1.41.10 (10-Feb-2009) /dev/sdc2 is apparently in use by the system; will not make a filesystem here! ** strace shows: open("/dev/sdc2", O_RDONLY|O_EXCL)      = -1 EBUSY (Device or resource busy) My conclusion is, isohybrid mode is a great hack!. But of course, carries some inevitable issues. The big dichotomy: * offset 1: + allows some partitions programs works without issues. (at least I know about parted issue) - Can not use extra partitions created in the medium. - Can not use /dev/disk/by-label/ skip archiso_early. * offset 0: - Cause issues with some partitions programs. + Can use extra partitions. + Can use "by-label" (under condition that all partitions must have a LABEL) Good luck! -- Gerardo Exequiel Pozzi ( djgera ) http://www.djgera.com.ar KeyID: 0x1B8C330D Key fingerprint = 0CAA D5D4 CD85 4434 A219  76ED 39AB 221B 1B8C 330D Yahoo! Cocina Encontra las mejores recetas con Yahoo! Cocina. http://ar.mujer.yahoo.com/cocina/