PXI 8187 hard disk capcity display

In the BIOS of the controller the 30 GB hard disk space is displayed only as 27119 MB or 26.24 GB? however actually the specified hard disk size is 30 GBwhy?

Naru,
This is because hard drive manufacturers have a different definition for the "megabyte" or "gigabyte" than computer scientists. In strict computer terms, a megabyte is defined as 2^20 bytes and a gigabyte is defined as 2^30 (kilobytes are 2^10, and terabytes are 2^40). Hard drive manufacturers, however, consider one billion bytes to be a gigabyte and also specify the unformatted drive space. Therefore:
A "30GB" drive contains 30,000,000,000 bytes... which in computer terms is 30e9 / 2^30 = 27.94 GB (and some additional space is "lost" due to formatting.)
I hope that this helps to answer your question!
Thanks,
Alan L
Applications Engineer
National Instruments

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+61 0432247152

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(Appreciate answers by giving KUDOS)
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