Unable to unmount primary OS drive when booted to external firewire drive backup.

[TelexStar]

As the title says, I've backed up my main MBP hard drive using the "Backup - All Files" script to an external Firewire drive partition. I can boot to the backup drive without a problem but I can't unmount the primary drive. When I try I get the message 'The disk "Macintosh HD" could not be unmounted. Make sure that all applications and files are closed on this disk.'

I've tried searching the forum and the only similar problem I could find was here:- http://www.shirt-pocket.com/forums/s...unt+hard+drive Someone who was backing up to an image (which I'm not doing) and was told to rename the image backup to the same as the primary drive. That's not an easy option for me, without re-formating my backup drive partition.

Any ideas what is causing this and how I can fix to unmount my main drive?

[dnanian]

Yes. Rename the backup drive to "Macintosh HD" and then start up from it.

[TelexStar]

By "Macintosh HD" do you mean whatever my primary drive is called ("HAL") ?

[dnanian]

Well, you had indicated above it was called "Macintosh HD". Is that not the case? You don't have to reformat, you simply have to rename.

[TelexStar]

Originally Posted by dnanian

Well, you had indicated above it was called "Macintosh HD". Is that not the case? You don't have to reformat, you simply have to rename.

Apologies - that was a typo on my part as I copied and pasted the error from another topic.

In any case. I've renamed the backup drive to the same as that of my primary drive and when I boot to the backup I still get the same error.

[dnanian]

I don't know why that'd be; something -- perhaps Spotlight? -- must have files open on that drive...