Apple

On Aug 30, 2009, at 12:53 PM, Luther Fuller 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 restarted into Leopard 10.5.8 on an external startup drive and tried again. But the problem has now infected the old system. 404.1 MB should fit into 412.9 MB, but does not and, yet, there are still 132 MB of free space on the image disk.

Since this problem involves arithmetic, I think it may go deeper than being just a problem with 'hdiutil'. And when it infects another system, it may be really serious. Perhaps I should bug report this.

Any opinion?

In SL 1GB = 1,000,000,000 bytes

In Leopard 1GB =1,073,741,824 bytes = 1024^3

That is if you have 432.6 GB in SL you would have about 404 GB in Leopard.

So, when you are computing available space, be aware that you might have some discrepancies like that.

Deivy Petrescu

email@hidden

References:
	>Snow Arithmetic (From: Luther Fuller <email@hidden>)