Dynamic Fly Height

One can never have enough or exhaust what is the latest invention when it comes to technology. One interesting thing to note is that whether one is keen on growing their knowledge in this area or not, a time comes when one finds themselves smack-dub in the middle of a genius invention or some technological jargon.

This also depends on where one is standing or how deep they have sunk into the topic in question. One such piece of “technological jargon” we can bring out in this piece is Dynamic Fly Height. This sounds like something to do with aviation – and not really the I.T world doesn’t it? Well, the fact is that this is a huge part (or at least should be) of your computer hard disk in the way it helps its operations and increases its capacity in making work easier and safer. Let’s take a closer look at Dynamic Fly Height.

What is Dynamic Flying Height?

According to Wikipedia, Dynamic Flying Height is “the flying height alternatively known as floating height or head gap is that distance between the platter and the disk (which can be either read/write) head on a hard disk drive.”

While these can be quite some technical terms for the layman, they can be grasped if broken down to “chewable pieces”. Ideally, people would like to have bigger space or capacity to store data or information on hard drives without necessarily making them much bigger in their physical size hence having them just as they already are. For the machines they serve, their size is ideal as is. How then can they be expanded to be able to take in and store more data?

How does this technology work?

Every hard disk has a twofold function. To write into (store) and read data from it. Data storage is very key and cannot be emphasized enough. How Dynamic Fly height works technically is by having two heat sources placed proportional to each other but are separated side by side within the hard disk drive. A heating element is the core of how this genius invention functions. A bump or projection is formed by the two heating sources and this makes a recession and off tracking of the read element together with the write pole from the main track.

That back and forth movement somewhat creates an illusion of flying which could be where this Dynamic Fly Height technology derives its name from. This Dynamic Flying Height is key in preventing any interruption or interference that may occur in the hard drive. In essence, a layer is introduced made of heater film and is placed inside the recording head (which is magnetic).

This is supposed to help in controlling the fly height placement spacing within the hard disk. A heater current is prompted as it is connected to a pre amplifier with the intention to escalate or shoot up the temperature inside the hard disk head facet. Once the “heat” is activated, expansion happens within the materials that form this particular head because they have within their build the characteristics for expansion when there is any subjection to heightened temperature.

This action results in an air bearing surface which is deformed by heating and therefore reduced space between the read gap, the write gap (RG and WG) and the disk platter. Once the read or write function is over or in the times when it is not necessary, the current is turned off automatically in order to allow the air bearing surface to go back to how it is originally formed without any manipulation or deformation.

This air bearing surface expands and contracts in an elastic way which means that there is not much change or any serious damage done on the head of the disk. The temperature range is also not too high that it causes potential defect. It is mild and manageable. Studies have continued to show that the heat when activated does not cause the magnetic reader within any harmful defect because the magnetic fields created through the activation of heat are very few. 

Is Dynamic Fly Height Technology important?

The answer to that question is a resounding YES! The use of this Dynamic Fly Height technology has proven to have an unmatched if not undisputed improvement in the performance of the Hard Disk drive. The challenge however comes in having a similar power setting and expecting to have the same amount of space in different heads. This is difficult because different head drives and manufactured by different people and each to their best knowledge capacity and expertise. In order to somewhat obtain an understanding of the spacing between different head varieties, a standardization process is done offline in order to try and find what the capacity and range of operation is between zero power and touchdown.

This great invention helps in providing ways which open up control in as far as the air bearing surface is concerned by reducing stress on the facet or surface during contact. It is this Dynamic Fly Height technology that helps to keep in track the efficiency of the reader and that of the writer elements and enhance it.

The Dynamic Fly Height helps in shielding of the read gap and write gap elements during the offline standardization process used to determine the spacing in the head of the hard disk. This Dynamic Fly Height is an invention that greatly provides control and stability of the read and write element when the hard drive is operating and minimal change in the structure or configuration of the head air bearing system.

Dynamic Fly Height technology allows heightened alert during the operation and standardization process of the hard disk.

We can clearly deduce that this Dynamic Fly Height technology is packed with nothing but positives. Not only does it allow for extended space and capacity in a hard disk drive, it does so ensuring the safety of the device and the top performance in read/write capacity. One can easily overlook how important this is in the world of technology and dismiss it as just another piece with extensive vocabulary yet the reality is that many great names in this sector embrace it in their products and rightly so. 

In conclusion, whether it is merely to help one understand what Dynamic Fly Height is all about should they encounter it in a products specifications or whether it is to explain its functionality, this piece strives just to paint a picture of the faintest idea in its identity, essence and functionality to both the lay man and the “tech guru” alike.

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