TechMicrosoftMicrosoft talks about Redesigning chkdsk and the new NTFS...

Microsoft talks about Redesigning chkdsk and the new NTFS health model in Windows 8


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In the next of their building Windows 8 articles, Microsoft talks about the new NTFS health model and redesigning the chkdsk utility.


This is how Microsoft starts the article:

While exceedingly rare, there are a variety of unique causes for disk corruption today. Whether they are caused by media errors from the hard disk or transient memory errors, corruptions can happen in file system metadata (the information used to map physical blocks to that vacation photo you took last year). To maintain access to your data, Windows must isolate and correct these errors, and the way to do this is by running the chkdsk utility.

In past versions, NTFS implemented a simpler health model, where the file system volume was either healthy or not. In that model, the volume was taken offline for as long as necessary to fix the file system corruptions and bring the volume back to a healthy state. Downtime was directly proportional to the number of files in the volume.

Reliable telemetry data from systems all over the world have shown us that, although corruptions are quite rare, when chkdsk is needed, it can take between a few seconds to a few hours to run, depending on the number of files in the drive–and even longer for larger storage servers.

In Windows Vista and Windows 7, we made significant optimizations to the speed of chkdsk but, as hard disk capacities have continued to double every 18 months and the number of files per volume is increasing at an equal rate, chkdsk has taken longer and longer to complete (even with speed improvements) .

So in Windows 8, we’ve changed the way we approach the health model of NTFS and changed the way we fix corruptions so as to minimize the downtime due to chkdsk. We’ve also introduced a new file system for the future, ReFS, which does not require an offline chkdsk to repair corruptions.

To read the rest of the article, click here.

We should be getting the release candidate of Windows 8 at the start of June.

Andrew Edney
Andrew Edney
I am the owner and editor of this site. I have been interested in gadgets and tech since I was a little kid. I have also written a number of books on various tech subjects. I also blog for The Huffington Post and for FHM. And I am honoured to be a Microsoft MVP since January 2008 - again this year as an Xbox MVP.


  1. Had to run checkdisk on my WHS v1 the other day because as 2tb drive was developing bad sectors. Talk about a pain. Ran it in the server and pulled the drive and ran it in a Win 7 client. Finally was able to remove the drive from storage after having to delete a few corrupt files. Everything but recorded TV was duplicated but I am still sorting though file conflicts for things that chkdsk couldn’t fix. Any way to do this faster would be great.

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