How to view NTFS partition allocation block size in Vista?

Question

What built-in (if any) tool can I use to determine the size of the allocation block for a particular NTFS partition?

Answer 1

Open an admin command prompt and run the following command:

fsutil fsinfo ntfsinfo [your drive] 

A byte in a cluster is equivalent to a distribution block.

Answer 2

Another way to quickly find it through the graphical interface on any Windows system:

• create a text file, enter a word or two (or random text) into it and save it.

• Right-click the file to display "Properties."

• "Disk size" = distribution unit.

Answer 3

Use diskpart.exe .

Once you are in diskpart select volume <VolumeNumber> , enter filesystems .

It should indicate the type of file system and the size of the distribution block. He will also tell you about the supported sizes, etc. The previously mentioned fsutil works, but the answer is not so clear, and I could not find the syntax to get the same information for the join point.

Answer 4

The value for BYTES PER CLUSTER is 65536 = 64K

 C:\temp>fsutil fsinfo drives Drives: C:\ D:\ E:\ F:\ G:\ I:\ J:\ N:\ O:\ P:\ S:\ C:\temp>fsutil fsinfo ntfsInfo N: NTFS Volume Serial Number : 0xfe5a90935a9049f3 NTFS Version : 3.1 LFS Version : 2.0 Number Sectors : 0x00000002e15befff Total Clusters : 0x000000005c2b7dff Free Clusters : 0x000000005c2a15f0 Total Reserved : 0x0000000000000000 Bytes Per Sector : 512 Bytes Per Physical Sector : 512 Bytes Per Cluster : 4096 Bytes Per FileRecord Segment : 1024 Clusters Per FileRecord Segment : 0 Mft Valid Data Length : 0x0000000000040000 Mft Start Lcn : 0x00000000000c0000 Mft2 Start Lcn : 0x0000000000000002 Mft Zone Start : 0x00000000000c0000 Mft Zone End : 0x00000000000cc820 Resource Manager Identifier : 560F51B2-CEFA-11E5-80C9-98BE94F91273 C:\temp>fsutil fsinfo ntfsInfo N: NTFS Volume Serial Number : 0x36acd4b1acd46d3d NTFS Version : 3.1 LFS Version : 2.0 Number Sectors : 0x00000002e15befff Total Clusters : 0x0000000005c2b7df Free Clusters : 0x0000000005c2ac28 Total Reserved : 0x0000000000000000 Bytes Per Sector : 512 Bytes Per Physical Sector : 512 Bytes Per Cluster : 65536 Bytes Per FileRecord Segment : 1024 Clusters Per FileRecord Segment : 0 Mft Valid Data Length : 0x0000000000010000 Mft Start Lcn : 0x000000000000c000 Mft2 Start Lcn : 0x0000000000000001 Mft Zone Start : 0x000000000000c000 Mft Zone End : 0x000000000000cca0 Resource Manager Identifier : 560F51C3-CEFA-11E5-80C9-98BE94F91273 

Answer 5

from the command line:

chkdsk l: (wait for the scan to finish)

sizdir32 http://www.ltr-data.se/opencode.html/

Answer 6

According to Microsoft, the size of the selection block "Determines the cluster size for the file system" is why this value is shown for "Bytes Per Cluster", as shown in the figure:

 fsutil fsinfo ntfsinfo C: 

Answer 7

You can use NTFSInfo v1.0 from the command line and convert fsutil fsinfo ntfsinfo to more readable information, especially information about the MFT Table.

Answer 8

A simple GUI method provided by JY in the previous answer:

• Create a small file (not empty)
• Right click, select "Properties"
• Select the "Disk size" checkbox (in the "General" tab), double-check that your file is less than half the size so that it certainly uses a single allocation block.

This works well and reminds you of the importance of unit size. But it does have a caveat: as can be seen from the comments on the previous answer, Windows sometimes shows "Disk Size" as 0 for a very small file. In my testing, NTFS file systems with a distribution block size of 4096 bytes required that the file be 800 bytes in order to avoid this problem. On FAT32 file systems, this problem does not seem to exist, even a single byte file will work - it’s simply not empty.

Answer 9

start> run> MSINFO32

goto components

goto storage

goto disk

search for bytes / sector

Answer 10

To fit the size of the file distribution block that you can select in the format dialog, follow the instructions of Kunal Mudliyar, then multiply the value by 8:

launching the introductory MSINFO32 add-on -> Storage-> drive Scroll until you find the drive you want, then read its "bytes / sector". Multiply this value by 8 to get the bit / sector, otherwise known as the file distribution file size in the Windows format dialog box.

Answer 11

leesh yama? ( In Arabic ) The solution is simple!

• Go to my computer.
• Right-click on the desired section.
• Click Format ... (but do not format)
• Finally, you will see the size of the distribution block of this section.

What is going on!

Respectfully, Holy Shake It, Mother Take It!