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VM Machines File Fragmentation

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VM machines file fragmentation.

Technology has a funny habit of solving one problem but then highlighting another. A typical example of this is the emergence of virtual operating systems, that is an OS that runs on top of another OS. While there are many advantages to many computer users in running these configurations they all rely the humble hard disk , and as fragmentation occurs, this can lead to instability and potentially data loss.

If you are fortunate enough to have very deep pockets then you may be using SSD’s or solid state drives. These still remain expensive and are out of the reach of most users who still have to rely (although getting much faster) on the slowest and some would say the most vulnerable technology in your computer- the hard drive. Hard drive fragmentation can cause problems with virtual machines and in some cases even data loss.

Fragmentation occurs on all hard drives and is part of the way the operating system stores the data on a disk. It won’t lay it down nice and neatly in one continuous block, but will lay it wherever there is a space. One file could literally be split into many separate places on the hard disk and this is fragmentation. If you have one OS running it can be bad but if you are running virtual machines the problems is far more serious.  

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Fragmentation is the scourge of modern computers as most people fail to conduct even the most basic maintenance on their computers. The situation just get worse over time and some people have even been known to purchase a new system even though there is nothing wrong with the old. On servers and raid arrays fragmentation is far more serious as it slows down business applications and reduces productivity. In very bad instances data recovery is the only method of saving the data.  

You would like to think that as the problem of file fragmentation has been with us since the advent of hard drive based computer systems, operating system vendors would have come up with a software solution to ensure the problem is eradicated at source. Whilst Mac OS X will partially help with files under a 20 mb size, Windows operating systems seem to pay it no heed whatsoever.

Windows does ship with its own on broad defragmentation tool but many would consider it a mere tick in the box as running the utility will mean that the hope of having a usable system in the meantime is improbable, and defragmentation could last for many hours or even overnight in some cases, so what are the other options.

Fortunately we are not left to the operating systems alone as there are a number of third party defragmentation applications that are far superior to the inbuilt OS tools. These can be scheduled to run when system usage is very low for example whilst the system is idle or the screen saver is running. As you go defragmentation is my personal choice.

Invest in dedicated hardware. Not the cheapest solution but for business and power user home systems probably the most sensible route. Dedicated hardware could be an additional hard drive (internal or external) a dedicated raid array or even an SSD device. The actual solution will depend on how mission critical the application actually is.

Virtual Machine Data Recovery


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