C
[broken link removed]A common marketing ploy by hard drive manufacturers is to calculate the size of a hard disk by using the decimal 10 system of 1000 bytes = one kilobyte, instead of the binary system where 1024 bytes = one kilobyte (your PC only knows binary). This rounding off practice means you end up with a hard drive with a capacity less than what is indicated on the label. For example, a true 80 GB hard disk can hold 85,899,345,920 bytes, but by using the base 10 formula, 80 GB comes out to only 80,000,000,000 bytes Do the simple subtraction, that's 5,899,345,920 bytes less than the true value. Now calculate what 5,899,345,920 bytes converts to by entering 5899345920 in the Byte box above. You will find that it translates to a loss of 5.49419 GIGABYTES!
Sony, Dell and many other computer manufacturers do this these days - i.e. don't ship Windows OEM reinstallation CDs/DVDs and use a special partition instead. It's a good cost cutting exercise for them.
Did you read the link? You can burn CDs/DVDs and then do away with the partition. Or I think you can use Sony's utility to tell the laptop to boot next time from the recovery partition in order to do a recovery install or full reinstall. I normally burn those images to CD/DVD (two copies just in case!) and then reinstall the full machine and recover the space in the process.
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