The Desktop External Hard Drive

Desktop external hard drives are normally 3.5" hard drives mounted in a larger enclosure than its portable counterpart. The enclosure may also have fans integrated to assist in keeping the drive cool during operation, which extends the life of the disk drive

The desktop external hard drive is designed with storage capacity in mind, rather than portability. Common desktop hard drives boast 500GB of storage, which would have been unbelievable only a few years ago. In fact, the storage capacity of these drives currently go to 1TB (TeraByte) and above.

These type of external hard drives are still portable in a sense, i.e., you can still unplug them and transport them. They often come with a separate power supply, which can be vital when you are transfering lots of data, as it maintains a constant current independant of the computer's USB power supply

Read More

The Portable External Hard Drive

Portable external hard drives are usually 2.5" hard drives (laptop hard drives) in a slimline enclosure, making them easy to carry. Although they are portable, they are not unbreakable and extra care is needed

while transporting them, for example, don't put them in your back pocket and then sit down!
The portable external hard drive is commonly "USB Powered", which means you don't have to carry a separate power supply unit
around with you. The only downside to this, is that the available current (power) is limited to the computer it is attached to.

This may not seem like a big problem, but if you have many other USB powered devices connected to the same computer (especially when connected to a laptop/notebook), then you will find the USB powered external hard drive will not perform optimally.

Some of the portable external hard drives that are available come with a separate USB power cable, which provides an extra power boost to the hard drive if required.

Read More

What is an External Hard Drive?

An external hard drive is the same type of hard drive as you would find inside a PC or laptop, except that it is mounted in a separate enclosure. It can be used to store information (data) permanently or temporarily, in the same way as a computer's hard drive.

External hard drives (the actual drive itself) come in two main sizes (physical size), 2.5" and 3.5". The 2.5" drives are the same as you would find in a laptop computer, whereas the 3.5" drives are identical to hard drives found in desktop PCs. The difference is in the interface that connects the external hard drive to your computer.

Usually external hard drives connect to the computer via a USB/Firewire cable, most modern operating systems will automatically recognise the hard drive as a storage device, and assign it a drive letter.

The fact that external hard drives are simply placed in an enclosure, means you can usually change the actual hard drive itself without too much effort. This allows you to swap drives between enclosures, so you only have to buy one enclosure for many drives (of the same type).

Read More

computer generasi 2

In the year 1948, the findings influence the development of the transistor computer. Transistors replace vacuum cleaner tube in television, radio, and computers. As a result, the size of electrical machinery decreased dramatically.

Transistors used in the start in the computer start in 1956. The findings in the form of the development of magnetic-core memory to help the development of second generation computers smaller, faster, more reliable, and more energy efficient than the preceding. The first engine that utilizes this new technology is superkomputer

IBM makes superkomputer named Stretch, and Sprery create computer-Rand called LARC. Komputerkomputer this, which was developed for atomic energy laboratories, could handle a large amount of data, a capability that is needed by researchers atom. Machine is very expensive and tend to be too complex for the computing needs of business, limiting the kepopulerannya. There are only two LARC has ever installed and used: one at the Lawrence Livermore Labs radiation, California, and the other in the U.S. Navy Research and Development Center in Washington DC Second-generation computers replaced machine language with assembly language. Assembly language is a language that uses abbreviations-singakatan to replace the binary code.

In the early 1960s, computers began to appear a second-generation success in business, in universities and in government. Computers this is a second generation of computers that use the full transistor. They also have components that can be associated with the computer at this time: a printer, floppy disks in the storage, memory, operating system and programs.

One important example of this computer is the IBM 1401 which is widely accepted in the industry. In 1965, almost all large businesses use computers to process the second generation of financial information.

Program stored in the computer and programming language that is in it to give flexibility to the computer. This flexibility to improve performance with a reasonable price for business use. With this concept, the computer can print the invoice and the purchase of consumer product design and then run or the payroll. Some programming languages began to appear at that time. Programming language Common Business-Oriented Language (Cobol) and Formula Translator (FORTRAN) start public use. Programming language is machine code that replaces the complex with the words, sentences, and math formulas more easily understood by humans. This is easier for someone to manage the computer and memprogram. Various new pop careers (programmer, Analyst, and computer systems expert). Software industry also began to appear and develop during the second generation of this computer

Read More