Cluster Size and zipping

Posted on 2010-01-10
Medium Priority
Last Modified: 2012-05-08
If Cluster size is bigger than a particular size, is zipping not possible in a NTFS disk?

Question by:anushahanna
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
LVL 22

Accepted Solution

chakko earned 500 total points
ID: 26280485
Zipping is possible.  Cluster size in relation to a file's size will only affect potential unused/wasted space.

e.g.  if cluster size is 8k and zipped file is 6k then the file still consumes 8k of disk space (1 whole cluster).  If cluster size is 8k and file is 12k then file consumes 16k of disk space. (2 clusters)

Assisted Solution

ndivani earned 1000 total points
ID: 26281144

 zipping is possible on NTFS . Cluster size affects only you to see file sizes in two versions on windows. When you click properties of a file you will see "Size"  and "Size on disk" . If the cluster size is bigger then you will see "size on disk " is larger than real size. But it never affects zipping,copying,moving etc. file manager activities.
LVL 28

Assisted Solution

by:Dr. Klahn
Dr. Klahn earned 500 total points
ID: 26281977
chakko and ndivani are correct.  The cluster size of an NTFS disk does not affect the feasibility of file operations on a drive.  The only effect on an application is the speed of retrieving a file.

NTFS cluster size does affect defragmentation on Windows 2000.  Drives having cluster sizes larger than 8 (4096 bytes) cannot be defragmented under Windows 2000.  This restriction was removed in later releases of Windows.
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.


Author Comment

ID: 26282717
Thanks. I had asked this, because my network engineer was positive that file allocation unit size  greater than 4k makes it impossible to do file or folder compression, so hence cannot be enabled on the logical drives implemented with let's say 32K size etc.

Could you please provide a link, if available, that I can show him to tell the point.

We are discussing on the policy of zipping by users, and hence this has been relevant in our discussions.


Assisted Solution

ndivani earned 1000 total points
ID: 26290732
try this link from microsoft :

Author Comment

ID: 26292497
it says in that site "NTFS file compression is not possible on drives with a larger allocation size than 4k."; with what clause do we interpret it?

thanks for your help

Featured Post

Turn your laptop into a mobile console!

The CV211 Laptop USB Console Adapter provides a direct Laptop-to-Computer connection for fast and easy remote desktop access with no software to install.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Concerto Cloud Services, a provider of fully managed private, public and hybrid cloud solutions, announced today it was named to the 20 Coolest Cloud Infrastructure Vendors Of The 2017 Cloud  (http://www.concertocloud.com/about/in-the-news/2017/02/0…
No single Antivirus application (despite claims by manufacturers) will catch or protect you from all Virus / Malware or Spyware threats. That doesn't stop you from further protecting yourself however - and this article is to show you how.
This video teaches viewers how to encrypt an external drive that requires a password to read and edit the drive. All tasks are done in Disk Utility. Plug in the external drive you wish to encrypt: Make sure all previous data on the drive has been …
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question