I Have a 150GB WD RaptorX and a 500GB Maxtor B.that I just installed in my brand new system. Why does it only show 139.7 GB's in my Raptor and 465.7 GB's in my Maxtor? Is this normal, or do I have to do something to recover those GB's.

I would really appreciate some help.

it's normal, one of the reasons is 1KB = 1024 bytes not 1000, the other reason is some of the space is used to contain tables for the drive

Thanks for your help mapex.. I really appreciate it

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The numbers work this way. The 150 GB HDD is claimed to have 150,000,000,000 bytes. But if you define "Gigabyte" as 1024 x 1024 x 1024 bytes, then 1 GB = 1,073,741,824 bytes, and the HDD will show up in your system with apparently "139.6984 GB". Make that 139.7. Similarly, the 500 will show as 465.6613 GB - make that 465.7.