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Usually this area is not bigger than 10 megabytes, so there is nothing to worry about.Manufacturer of your PC can create a “Host protected area” on your hard drive to store an image of the original operating system and programs.This area is used when you want to restore the original state of your desktop PC or laptop without using CD/DVD disks. In this case, to restore the original capacity of the hard drive with the HDD Capacity Restore tool that we include in this article, you may need to remove the hard drive out of its original PC/laptop and temporary attach it to another PC.
Hard drive manufacturers use decimal gigabytes while operating systems use binary gigabytes.
One decimal gigabyte contains that’s more than a 7% difference!
So, your 300 GB hard drive will show up in Windows as a 279 GB hard drive.
Motherboard can create a so-called “Host protected area” on your hard drive to store its data.
MHDD can also access DCO (Device Configuration Overlay), and that allows you to not only change hard drive’s capacity, but also switch some hard drive functions, such as LBA48 support, Security commands support and others.
Some manufacturers (for example, Dell and HP) use DCO to reduce capacity for marketing needs.Example: they need to ship 1000000 computers with 40GB hard drives, but they only have 80GB drives in stock.Author: Dmitry Postrigan 531 Comments This article is a complete guide on recovering your hard drive’s factory capacity.At the end of this article there is a link to our program that recovers factory capacity of any hard drive. There are ways to get around this problem, but since these Operating Systems are rather rare nowadays, I do not see the point of writing about them.Windows 2000, 2003 and XP do not support big drives by default; you will have to install the latest service pack in order to get big drives working properly on these OS.Windows Vista does not have any issue with big drives.