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Re: Snow Arithmetic
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Re: Snow Arithmetic


  • Subject: Re: Snow Arithmetic
  • From: Luther Fuller <email@hidden>
  • Date: Wed, 02 Sep 2009 14:20:12 -0500

On Aug 30, 2009, at 12:53 PM, I wrote:

Now using Snow Leopard. When I backup, I create a sparsebundle with ...

else
"hdiutil create -type SPARSE -megabytes " & imageSize & " -fs HFS+ -layout NONE " & imagePath & ¬
" -volname " & quoted form of imageName & " -attach"
end if
do shell script the result

which I then burn to a 4.7 GB DVD+R. The image disk is now mounted on my desktop and has 432.6 MB of Available space (Get Info says so). I need to copy a 409.1 MB folder into this free space. It should certainly fit. But, after copying 296.2 MB into the free space I receive the message "The operation can't be completed because the disk is full." Yet, the image disk still has 136.1 MB Available.

I finally got around to looking into the details of this, today. While preparing for testing, I needed to add a line of diagnostic code to my applications that create sparsebundles and burn them to a DVD. I recompiled them in Snow Leopard.

I have now run two tests, one in 10.5.8 and one in 10.6. Both behaved the same and flawlessly. I had no problem copying data to the sparsebundle. I was able to fill the sparsebundle to its stated capacity without the erroneous "... disk is full" error. The arithmetic problems seem to have gone. Both of the sparsebundles burned properly to a DVD+R without the formatting problems I encountered a couple of days ago.

It seems there is no problem with my code, I just needed to recompile in Snow Leopard.

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