Unmounting VOBs from the command line (Linux and UNIX)
At the system prompt, type this command:
To unmount one VOB: cleartool umount vob-tag
To unmount all public VOBs and all private VOBs that you own: cleartool umount -all
Try it!
To unmount, type this command:
cleartool umount your-username_denali_release_development
To mount the VOB again, type:
cleartool mount your-username_denali_release_development