Hard Drive Technologies

Reviews, Guides, Tips and Recovery of Hard Disk Drive Data

Why You Should Use An External Hard Drive

September 19, 2011 Jon 0 Comments

The computer part that holds data is a hard drive and an external hard drive is a hard drive that is outside the pc case in its own housing. Every laptop or computer needs at least one hard drive to keep its operating system, programs and user handling. It is normally internal but extra external hard drives have become essential.

An external hard drive has become vital because there are probable security risks to our pc’s like virus due to Online access even after using anti-virus programs and firewalls.
Aside from this, inadvertent problem of delicate files and extra room necessary for multimedia storage are some of the difficulties and one single remedy to all such problems is the external hard drive.

The external hard drive is enclosed in an housing outside the main pc and is a little bit larger than the hard drive itself and oftentimes has a cooling fan. The external hard drive is attached to the computer through a high-speed interface cable, which enables the external hard drive to communicate with the laptop or computer by means of interfaces like USB and Fire Wire.


An external hard drive is a very helpful piece of equipment in the sense that it enables anyone to save or keep important information detached from the main internal hard drive, which could be affected by on-line or off-line activities. An external hard drive can hold delicate files, DVD images, disc images, big music documents, movies and also a save of the contents of the main internal hard drive safely and securely. When on line, external hard drive can even be left turned off.

A good external hard drive has one more benefit – it is portable and functions on plug and play basis. The external hard drive can be utilized as a storage device for almost any pc with a USB or Fire Wire capability.

Hard drives come in two basic formats: SATA (Serial Advanced Technology Attachment) and IDE (Integrated Drive Electronics). IDE drives use a 40-pin connection and are inexpensive and SATA hard drives are usually quicker and move data at six times the rate of IDE external hard drive.

A good external hard drive is simply composed of the Platters, the Spindles and Spindle Motor, the Read/Write Head and the Head Actuator.

The Platters are the actual discs within the external drive that save the magnetized data. Platters made of glass or ceramic are utilized because they are usually thinner and are far more heat resistant. Normally, the external hard drives have no less than two platters and the greater the storage capacity of the hard drive the more the platters. The Spindle Motor is created right into the Spindle and spins the Platter at a regular fixed rate between 3600 to 7200 rpm.

The Read/Write Head scans and writes the data to the Platter. There is actually one head per platter side and each head is attached to a particular actuator shaft. One of the heads is active at a time reading or writing the data. All the heads are usually attached to a particular head actuator, which moves the head around the Platters. The platters spindle, spindle motor, head actuator and the read or write head are usually all within a chamber called the Hard Disc Assembly.

You can also buy various types of portable external hard drive and switch them in and out of the same enclosures, employing only one for work, only one for back up, and one for multi media and song and so forth in so doing you’ll find boundless factors to use an external hard drive and become prepared against data-loss.

Michael Allen has written for Newbielab since July of 2009. He has published short stories in numerous literary magazines and written for several publications put out by University of Washington, where he received a BA in English in 2003. His preferred topics are Business, Health, Politics, and History.


Bill opens up a computer hard drive to show how it is engineered. He describes how the “head” reads the magnetic information on the disk; reveals how a voice coil motor and a slider controls the position of that head. He also discusses how smooth a disk must be, and briefly mentions a mathematical technique that allows engineers to pack more information on a drive. This video will be part of a companion volume. You can get preliminary details at www.engineerguy.com

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