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Old Nov 10, 2007, 02:06 AM   #1
macrumors regular
Join Date: Aug 2007
Location: Atlanta, GA
Using dd I'm getting a Resource Busy error

Hello, I'm trying to restore an old Hard Drive image OS.dmg to a usb hard drive that I have.

I'm using the command:

dd if=/Users/Shared/OS.dmg of=/dev/disk5 bs=1m

And I'm getting

dd: /dev/disk5: Resource busy

What would cause this error? I'm not sure why it's "busy"



PS.. I get the exact same thing when i try to do it in DiskUtility
JoshFink is offline   0 Reply With Quote
Old Nov 10, 2007, 11:06 PM   #2
macrumors newbie
Join Date: Nov 2007
I just did this - what I did may work for you

In order to overwrite all the information on the disk, you have to make sure the mac OS isn't using it first

Open the, and on your USB hard drive, unmount any of it's partitions. Do not eject the USB hard drive.

Right click on the hard drive in the DiskUtility and get it's Identifier from the Information tab.

Now take your image, and the identifier, and put it all together with something like this, on the command line in terminal:
dd if=<your image file> of=/dev/<disk identifier>

That worked for me putting the diskboot.img bootable Linux image file onto a USB hard drive that had the identifier disk1 by doing dd if=/Users/mike/diskboot.img of=/dev/disk1

good luck
mikehardy is offline   4 Reply With Quote
Old May 4, 2009, 10:47 AM   #3
macrumors newbie
Join Date: Feb 2008
That did the trick thanks
Ryan813 is offline   0 Reply With Quote

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