Hi EdOates,
Thanks for sharing that script! :-) It looks pretty good & I'm going to try it. If I'm backing up to an external FW disk (not an image file) is the command the same to eject the disk? Can you tell me what the command is to mount the disk if it's not mounted?
I've seen that SD! can mount an image file when needed automatically, but how to mount an external drive? I don't think the Finder knows how to do that. Maybe DiskUtil is the right tool for that? I'm just don't know the correct command or syntax. I Googled around and found a helpful reference for mounting disk volumes at the command line.
http://www.ss64.com/osx/mount.html
But it seems to require that I refer to the external drive in the style of /dev/disk* . That seems like something that might change from day to day, especially if the ext FW drive(s) are dismounted?
Or it is just easier (even if many times slower) to back up to a sparse disk image if I want to dismount/close it at the end of the back up session? That way SD can auto-mount it when needed next time.
Thanks,
Dave