How to find cluster size of NTFS

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Tod - 27 Sep 2004 23:13 GMT

I've got a spare drive formatted with NTFS.
How do I find out the cluster size ?

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Michael Cecil - 27 Sep 2004 23:41 GMT

>I've got a spare drive formatted with NTFS.
>How do I find out the cluster size ?

3rd line from the bottom after a chkdsk.

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Tod - 28 Sep 2004 00:02 GMT

I'm not that smart, "chkdsk" is ?

>>I've got a spare drive formatted with NTFS.
>>How do I find out the cluster size ?
>>
> 3rd line from the bottom after a chkdsk.

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Michael Cecil - 28 Sep 2004 00:57 GMT

>I'm not that smart, "chkdsk" is ?

- Open a command prompt. (Start>run>type in "cmd" and click OK)

- In the window that opens type "chkdsk c:" and press return (where c is
the drive you want to check).

- Windows will check the drive and report if there are errors. It will
also report "XXXX bytes in each allocation unit". 4096 bytes would mean
you have 4K clusters. 512 bytes would mean you have 512 byte clusters.

(If you want to repair any disk errors it finds use the same command but
with the /f switch. "chkdsk c: /f" It will need to reboot to fix errors
on the system drive.

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Andrew Rossmann - 28 Sep 2004 22:33 GMT

> I've got a spare drive formatted with NTFS.
> How do I find out the cluster size ?

Right-click My Computer and choose System Information. Click on the
Drive tab. Choose the drive/partition from the drop-down, then click on
Details. Expand the Logical drive part of the tree. Multiply 'Sectors
per cluster' by 'Bytes per sector' (which is usually 512.)

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