Skip to main content

I've created a Netboot image using AutoCasperNBI and an image made via AutoDMG with OS X 10.11.1. I normally like to use Disk Utility to create an image of the volume for backup purposes. However, when I select the Macintosh HD volume (this is on the drive in the computer, not the netboot image, I cannot do so. I continue to get an error:
"(null)" does not have enough available space to create "Macintosh HD "disk image file. Choose a different volume with at least 79.37GB of space available to continue.

The volume I'm trying to back up is 79.37GB, but the server share I'm backing up to has more than 400GB free. And the netboot server has 200GB of free space. In Server.app I have netboot service set to only Images only (not Images and Client Data). When I'm netboot, I do see in the client that the netboot image disk has 68.72GB which I'm not sure where it's calculating that number from.

The weird thing is that this does not happen on my 10.10.4 NBI (created in the same fashion using Auto CasperNBI with image from AutoDMG).

Is this a bug in Disk Utility in 10.11? Or is it the way AutoCasperNBI created the netboot image that might be causing this?

Wondering if anyone else has seen this. Paging @bentoms just in case...

P.S. this new Disk Utility app really blows chunks. In what world does Apple think that resizing a pie/circle is better then the old method. Very hard to resize. And repartitioning is another mess.

@bpavlov Interesting issue.

Some people have ported the old Disk Utility to 10.11, maybe pop into the macadmins.org Slack & give a shout out to @clburlison?

Or see if he responds here.

Last alternative, fork AutoCasperNBI & change the .sparseimage size to something like 100GB.

Then recreate the NBI using that forked version.

Yes. 10.11 has been giving me all kinds of issues. I have done limited testing with a patched version of 10.10 Disk Utility on 10.11 and at this time all my weirdness has been resolved. However this isn't supported by Apple so your milage my vary and we could very well be introducing more issues.

The Disk Utility Patch by dimosgmx might resolve your issue. You'll need a insanelymac forum account to download the file. Then just drag a 10.10 Disk Utility app onto his patch tool.

If that works you could use Composer and package that up for AutoCasperNBI to install your patched version of Disk Utility on you NBI.

Terms & ConditionsCookie settingsAccessibility statement