Could the difference in GB be...
...The fact that drive manufacturers use units of 1000 to measure a KB, and the software you're using considers 1024 to be a KB?
"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
- Benjamin Franklin, 1759 Historical Review of Pennsylvania
I really upset a guy in Capacity Planning some years ago.
I insisted he take the different into account. It was, unfortunately, the only way to prevent management complaining that what they bought wasn't what they got.
He was used to working on the mainframe where he never encountered this difference. However, HP's and Seagate's idea of 4Gb disks didn't quite match up to HP-UX's idea of a 4GB disk. It was the 1000/1024 multiplier difference.
"Don't give up!"
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