Revising Concepts

REVISING CONCEPTS BY SEHRISH MAHMOOD

UNPARTITIONED SPACE vs. PARTITIONED SPACE  Unpartitioned

space is basically all the space of a drive that has not been partitioned and formatted.  You cannot install in an unpartitioned space.

UNPARTITIONED SPACE-8MB There

is always an 8MB of space that is left at the front of a drive and is left unavailable for use in the initial partitioning and formatting of a drive.

UNPARTITIONED SPACE-8MB  If

you have already partitioned the drive from the following operating systems, the unpartitioned space of 8MB is hidden:  MS-DOS Microsoft Windows 95 Microsoft Windows 98 Microsoft Windows 98 Second Edition Microsoft Windows NT 4.0 Microsoft Windows 2000

UNPARTITIONED SPACE-8MB

The unpartitioned space 8MB has following main three functionalities: 1. This space is left so as to be able to make the drive a "Dynamic Drive“.

Basic drives vs. Dynamic drives  Basic

drives and dynamic drives differ in one crucial respect. The basic partitions are confined to one disk, and once you set their size, it's fixed.  Dynamic volumes overcome this limitation because you can adjust their size and you can add more free space to them, either from the same disk or another disk (multiple hard drives).

UNPARTITIONED SPACE-8MB 2. The space at the front of the physical hard drive is not really empty, it contains the meta-data necessary for allocating and addressing the rest of the disk. 3. This area also holds the meta-data the System BIOS reads to recognize the disk exists, and it can also be used to store 'bad sector' locations.

BIOS  The

BIOS software has a number of different roles, but its most important role is to load the operating system.  When you turn on your computer and the microprocessor tries to execute its first instruction, it has to get that instruction from somewhere.  It cannot get it from the operating system because the operating system is located on a hard disk, and the microprocessor cannot get to it without some instructions that tell it how.  The BIOS provides those instructions.