Tags:
If you unmount your external hard drive from time to time, rather than unplugging it and plugging it in again, you can do something like this: when the drive is mounted, do disktool -l and make a note of the number of your drive (probably something like disk1s9), then, when you need to mount it again, just do disktool -m disk1s9. (Probably very obvious, but I didn’t know about disktool until just now…)