Condusiv Technologies Blog

Condusiv Technologies Blog

Blogging @Condusiv

The Condusiv blog shares insight into the issues surrounding system and application performance—and how I/O optimization software is breaking new ground in solving those issues.

Diskeeper 2010 is certified for Windows Server 2008R2

by Michael 4. January 2010 05:05

As of December 31st, Diskeeper 2010 is certified. 



The Diskeeper Dashboard - IntelliWrite

by Michael 17. December 2009 11:58

We have an online FAQ that I thought I'd post here as well. It provides some valuable insight into what's going on with all those graphs and statistics related to our proprietary new IntelliWrite technology.

IntelliWrite Fragmentation Prevention


This section of the Dashboard tab explains that IntelliWrite increases system performance by preventing fragmentation before it happens.

IntelliWrite System Statistics for All Volumes Since the Previous Day

This section of the Dashboard Tab includes statistical information regarding fragmentation prevented by IntelliWrite, fragmentation eliminated by Automatic Defragmentation, and a sum of the two numbers since the previous day.

It is important to note that the amount of fragmentation prevented is an estimation determined by a large number of factors and extensive testing. The IntelliWrite graphs are designed to approximate fragments prevented across a wide range of applications and must incorporate various types of file writes and modifications into a singular display. In some cases the charts may over-estimate and in other cases, underestimate. For example, on SQL Server® the graphs may overestimate about 10% of the fragmentation prevented, on Microsoft® Office documents it may underestimate the number of fragments prevented by 80%. What is important is that with IntelliWrite enabled, fragmentation is being handled, before it happens. The end result of having Diskeeper with IntelliWrite and Automatic Defragmentation working is a system running at peak performance in the most efficient way possible (without fragmentation).

The statement: "Proactive prevention is the most energy efficient method to eliminate increased storage power consumption caused by fragmentation," points out that when IntelliWrite is handling your system’s fragmentation, it is reducing the amount of disk head movement previously needed to accomplish defragmentation and therefore is reducing Diskeeper's total system resource footprint.

System Fragmentation Prevention Graph


This section of the Dashboard tab shows system fragmentation prevented by IntelliWrite in real-time. In the graph, fragmentation prevented every second, within the last minute, for your entire system, is displayed in green. The scale on the left side of the graph pertains to the number of fragments that have been prevented and the scale along the top of the graph pertains to the seconds in the last minute.

Statistical Information for Selected Volume(s) Since the Previous Day


This section of the Dashboard tab shows statistical information for selected volume(s) since the previous day. The columns of the table include the name of the selected volume(s), whether or not IntelliWrite and Automatic Defragmentation are enabled, the number of fragments prevented, the number of fragments eliminated and file read/write time % improvement.

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Diskeeper | IntelliWrite

Fragmentation Prevention - Say Hello to Our Little Friend

by Michael 3. December 2009 12:39

Since the ground breaking release of Diskeeper 2010 I've seen comments that other defragmenters prevent fragmentation.

Ok, so let's technically dissect "how" such a claim may come about...

Does consolidating free space reduce future fragmentation? Yes it helps your odds, but reducing fragmentation and preventing fragmentation are not the same. If you are relying on consolidated free space to offset re-fragmentation you need some luck that the big, or closely located, chunk of free space is where the file(s) being written are going to be placed.


Only ONE free space segment means only ONE place for a file write to go, hence no fragmentation. - That is a true statement, but...

Windows is a robust and dynamic OS. There is a constant and infinite stream of background file writes, modifications and deletions, not to mention all the user generated activity from applications. That makes for a tremendous amount of change in the files and file locations on a volume. Understanding this relentless activity is important because it belies the concept of creating a singular massive chunk of free space as the solution to prevent fragmentation. Any "pretty disk" that gets created (i.e. all files in one area and all the space in another) may look nice in a visual display, but it just doesn't last for more than a few seconds.


You can imagine that attempts to maintain that one massive singular free space area would make for a defragmenter that has to always pack gigabytes of non-fragmented files together with every background deletion/creation event. Busy, busy, busy defragmenter. But hey, a lot of a shiny colors and smiley face emoticons. Yay! 


Now, are there specific benefits to large free space chunks? Absolutely (e.g. shrinking a volume), and Diskeeper provides this too. The key in efforts to consolidate free space into a handful of larger chunks needs to be balanced so that the cost (power usage, wear and tear, system resources, etc...) does not outweigh the benefit (performance). Again, this is the perspective that Diskeeper applies as it optimizes your Windows file systems.   

Now speaking theoretically, if ALL free space were in ONE big chunk, you would be forced to write a file in ONE piece. It couldn't possibly fragment, right? Wrong... 

The bigger issue isn't even about trying to keep some singular giant free space chunk available, because even if you did, there is a more significant obstacle. Windows can write numerous files from numerous processes simultaneously, or more accurately, under the impression of being simultaneous. In reality it is commonplace that some files (File A below) will continue to be held open for writing more data, all the while newer files (Files B & C) start and complete writing all their data. As the first file, which has not yet been "closed", is still being expanded, it has to be written "around" the newer placed files. This causes that first file to fragment around those more recent files that were placed in the way.

This happens ALL the time - your browsers download of a website's many associated files is a perfect example.  

In summary:

Reducing fragmentation is a passive act. Preventing fragmentation requires more than neatly ordered files and free space, it requires a truly intelligent and advanced design that dictates HOW files are written. Only Diskeeper 2010 with IntelliWrite technology offers fragmentation prevention.

So, if you prefer to not leave eliminating fragmentation to chance, given you are spending your hard earned money, and "you wanna play rough [with fragmentation] ok, say hello to our little friend", Diskeeper Twenty-Ten.




Chip Magazine challenge

by Michael 25. November 2009 12:03

Chip Magazine ( is a premier technology publication in Germany, and much of Europe for that matter. They recently completed a defrag head-to-head comparison of 6 various defragmenters, including the Windows Vista built-in product (which also happens to be very similar to Windows 7 built-in).

The timing worked out that we were able to submit Diskeeper 2010 beta software into their challenge.


We're excited to announce Diskeeper took 1st place based on their rigorous technical testing process. Ausgezeichnet!

Here's a screen shot of the points awarded (only Diskeeper received the max 5) and placement of the entrants (only Diskeeper ranked in the top class). I removed the other product names to protect the "guilty" :-).

If you're a subscriber, you can read the whole 4 page review (in German mind you).



2009 Windows IT Pro Editors' Best and Community Choice Awards

by Michael 23. November 2009 05:12

Diskeeper has just been awarded the Editor's Best award (Gold) by Windows IT Pro. 

"Diskeeper does its job well. It defragments in the background without hurting system performance and doesn't require defragmentation scheduling." —Zac Wiggy, assistant editor, Windows IT Pro

"Diskeeper 2009 is loaded with features, works as advertised, and can bring the most choppy and fragmented hard drive back to silky-running smoothness." —Jeff James, editor in chief, Windows IT Pro

Diskeeper also took Silver in the Community Choice Award; recognition from users for which we are very appreciative. Our way of saying thanks will be to go right back to work and innovate more new technologies to improve your system's performance and reliability.





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