Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results

Home NTDEV

Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging


The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.


Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/


NTFS:-> Metadata Compressed or not???

OSR_Community_UserOSR_Community_User Member Posts: 110,217
HI,

I just wanted to know if any of u can confirm what all is meant by the fact that 'NTFS Metadata is not in the compressed state on the disk, for a compressed file'.

Metadata here surely refers to the MFT Record Entry of a file, $FILENAME attribute of a file, $STANDARD_INFORMATION attribute & the other attributes. Or is it not?

What about $SECURITY_DESCRIPTOR attribute? If by some rare chance it actually happens to be non-resident & on top of that greater than 16 clusters on disk. Will it be compressed when the file is compressed???

And, what about Named Data attributes?? I personally found that named data attributes of a compressed file turn out to be uncompressed even when greater than 16 clusters in size. Does it meant Named Data is also MetaData????

Thx for ur time & consideration.
Mayank.
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. Sign in or register to get started.

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Kernel Debugging 13-17 May 2024 Live, Online
Developing Minifilters 1-5 Apr 2024 Live, Online
Internals & Software Drivers 11-15 Mar 2024 Live, Online
Writing WDF Drivers 20-24 May 2024 Live, Online