Create
To add a 0.5 GB ramdisk unter Mac OSX 10.6 execute in terminal window:
$ diskutil erasevolume HFS+ "ramdisk" `hdiutil attach -nomount ram://1165430`
The size argument is calculated as MB * 2048. So if you want a 256 MB ram disk: 256 * 2048 = 524288
Remove
Remove the ramdisk by ejecting the drive icon.
Automate
Since after each restart the ram disk is lost, the following AppleScript application can be used as a login item to make a new one.
do shell script " if ! test -e /Volumes/\"ramdisk\" ; then diskutil erasevolume HFS+ \"ramdisk\" `hdiutil attach -nomount ram://1165430` fi "
