Hello Dankgai, hope thats Your name :-) I've read Your very nice and helpful article concerning backup/restore with Mac OSX and I wanna give You some informations about my experiences with 'dd'. 1. it works :-) 2. the backup disc and the replace drive must not have the exact same size as the source drive. They should be at least equal, better bigger. 3. the 'dd' works for all partitions, if You select the whole disc. 4. I tested this with my G4/400 using the internal IDE drive and an external firewire drive. 5. its possible that the replace drive is smaller (maybe a few bytes) though its the same brand and model. You can handle this, if You create a litte spare partition at the end of the source disk. The 'dd' will fail, but the restored drive works. 6. its interesting, that the firewire drive directly works. So, its possible to move the drive physically (from the firewire case to the internal bay). Thats the quicker way for restoring of very big drives :-) so long Eberhard Knechtel firstname.lastname@example.org
Filesystem 512-blocks Used Avail Capacity Mounted on /dev/disk0s10 8387838 3398621 4989217 40% / devfs 90 90 0 100% /dev fdesc 2 2 0 100% /dev <volfs> 1024 1024 0 100% /.vol /dev/disk0s9 8387800 3633400 4754400 43% /Volumes/MacOS_9 /dev/disk0s14 2097117 17688 2079429 0% /Volumes/HFS /dev/disk0s15 2032116 24 1930488 0% /Volumes/UFS /dev/disk2s9 11730240 19562 11710678 0% /Volumes/extbay automount -fstab  0 0 0 100% /Network/Servers automount -static  0 0 0 100% /automount
Unmount the destination volume for safety if possible (dd does work even on mounted target disk but it is way too dangerous!). Usually you simply drag the drive icon to the trash can. If your destination drive is ejectable media, well, go to next step hoping no process will touch the destination drive.
CAVEAT: you can't use use umount command via Terminal because any disk that appears on the desktop is considered 'busy'
Wait for a long time. How long it takes depends many factors. When I tried on PowerBook G3 (pismo) from internal HDD to expansion bay, the transfer rate was about 500kBytes/s. Sounds fast enough? It means it takes 2000 seconds to transfer 1GB. More than two hours to fill a DVD. You can actually double the figure by increasing block size. by adding 'ibs=1m' to dd command the figure doubled. You should leave obs untouched unless you are sure what you are doing.