9 Replies Latest reply: Aug 24, 2012 8:05 PM by diffengr
damienfromqld Level 1 Level 1

When trying to create a USB flash boot drive from the Mountain Lion image (4.348GB) using 2 brand new SanDisk Extreme USB thumb drives (8GB & a 16GB) the process concludes with " Restore Failure" & "Could not restore - Invalid argument" as shown below:failed_OSX_USB_boot.jpg


After performing a verification of the partition I get this:


Verify and Repair volume “Mac OS X Install ESD”

Checking file systemChecking Journaled HFS Plus volume.

Invalid B-tree node size

The volume   could not be verified completely.

Volume repair complete.Updating boot support partitions for the volume as required.Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.


I have reformatted the disc as FAT and used a PC to run in through Defrag and Scandisk. No issues showing up on either tools, no bad sectors and the drive sizes are showing correctly.

b-tree node size.jpg


Why do I get this error? Is the ML image faulty? Please help me out here.




Thanks & Regards,


iPhone 4S, iOS 5.0.1, Mac OSX 10.6.8 & iTunes 10
Solved by David Schwab on Aug 8, 2012 10:13 AM Solved

Try Lion DiskMaker 2. It's free, so if it doesn't work you didn't waste anything but time. But it worked for me and was pretty quick.



Reply by David Schwab on Aug 8, 2012 7:13 AM Helpful

I installed Mountain Lion using the Lion DiskMaker 2rc1, which also works for 10.8. That worked fine on two drives. Why not give it a try instead of doing it the manual way.

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