apparently it doesnt work
http://www.theinquirer.net/?article=14608
scroll down a little:
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About the "recover unused space on your drive" article:
Working for a data-recovery company I know a thing or two about harddisks....
One is that if the vendors would be able to double the capacity for just about nothing, they would.
All this probably does is to create an invailid partition table which ends up having:
|...new partition.............................
|old partition.................................|
overlapping partitions. So writing either partition will corrupt the other. It probably so happens that whatever situation people tried it, it just so happened that the (quick) format of the "new" partition didn't corrupt the other partition to make it unbootable.
And the 200G -> 510Gb "upgrade" probably has ended up with three overlapping partitions....
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OR
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Commenting on an article you posted today about hidden hard drive space. It was brought to my attention from a link to it from HardOCP.
What is happening is that Norton Ghost creates a virtual partition on the drive, and the data for that virtual partition resides on one of the existing partitions. So as more data is added on the virtual partition, a file on the normal drive partition expands as well.
It's kind of like a disk image which is being mounted to a drive letter. All the data for it is still on the primary partition.
Hopefully that's clear enough to explain what is happening here. The extra virtual partition basically is defined as the amount of freespace on the partition to which the that virtual partition file actually resides.
In short: No miracle space here, don't bother the hard drives manufactures. Just using a feature in ghost in a weird way, but with no real benifits other than being able to boot a disk image without reszing all the partitions on your drive.
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etc... etc...