Friday 19 September 2014

OS X H/W 3

OS X
http://www.brightsideofnews.com/wp-content/uploads/2014/05/AppleLogo.jpg
Developed by Apple Inc
OS X is the operating system that powers every Mac.
It was the successor to Mac OS9
Initial release march 2001
Advantages-
Security-
Mac OS is a two-layered system: the attractive GUI sits atop a Unix core, and Unix is best-known for its security features. It's simply impossible to install a destructive trojan or virus unless the user explicitly allows it root access via typing in the admin password.
Disadvantages-
Price-
Gaming-
Fewer software options-

how they have changed-

After each update from the original 10.0 release there has been loads of new additions. There have been constant bug fixes in early versions and are all gradually faster than it previous.

Drive formatting H/W 2

Drive Formatting
 
 


                                                                                                                        


It is the process of preparing a data storage device such as HDD, SSD, Floppy disk or USB for initial use, This so that it you can store information on it.
Pros:
1. Formatting removes bad programs and sophisticated viruses
2. After Formatting your partition will become clean and your system is ready for new programs
3. Scan and Repair bad sectors( Full Format)

Cons
1.Formatting your windows will gives you lesser chance to backup necessary file.
2. The programs that you have installed will be deleted and you have to reinstall it again as you wish.
3. Formatting will take enough time to finish. After installing OS around 40 minutes you need to install all the drivers and necessary programs that sometimes will take up 2 to 3 or defending on the number of programs you are going to install.
4. Formatting Windows requires preparation for the tools you are going to use.( see what to prepare for Formatting Windows)
5. According to experts, always formatting your Hard Disk is not ideal because it can cause gradual damage to your Hard Disk or may reduce the lifetime.
Formatting a disk for use by an operating system and its applications typically involves three different processes.
1.Low-level formatting (i.e., closest to the hardware) marks the surfaces of the disks with markers indicating the start of a recording.
2.Partitioning divides a disk into one or more regions, writing data structures to the disk to indicate the beginning and end of the regions. This level of formatting often includes checking for defective tracks or defective sectors.
3.High-level formatting creates the file system format within a disk partition or a logical volume. This formatting includes the data structures used by the OS to identify the logical drive or partition's contents. This may occur during operating system installation, or when adding a new disk. Disk and distributed file system may specify an optional boot block, and/or various volume and directory information for the operating system.


CPU H/W 1 Macauley Gibb


C.P.U

Description
C.P.U stands for Central Processing Unit and is the brains of any computer. It is an internal component for a device such as a computer. CPU's Often Have their own fans to cool them as they normally overheat if they do not, this can lead to a system crash or even cause your CPU to become unusable.

Multi Processing
A computer can have more than one CPU. This is called multiprocessing. All modern CPUs are microprocessors, meaning contained on a single chip. Some integrated circuits (ICs) can contain multiple CPUs on a single chip; those ICs are called multi-core processors.

Clock Rate
The Clock rate of a CPU you the speed of which it executes instructions, the faster the clock, the more instructions the CPU can execute per second. The clock rate is generally measured in hertz.

Types

There are two main types of CPUs found in computers today: 32-bit and 64-bit. In addition to this, CPUs can be broken down into types based on the manufacturer and version as well.