Widows 10 Storage Space and 64K sectors

Question

Hi,

I would like to set a cluster of 64K on my storage space (3 x 4TB drives) however I cannot fins the possibility to select cluster size at the creation of the storage space drive. The standard that it creates automatically is 4K.

Windows versions 20H2

Thanks for any support

Answer 1

Hi,

What is the file system of the virtual disk in the storage space, is it NTFS?

If it is NTFS, it seems to be related with that NTFS disk using a 4K cluster size by default when a volume or pool is under 16TB.

https://support.microsoft.com/en-us/topic/default-cluster-size-for-ntfs-fat-and-exfat-9772e6f1-e31a-00d7-e18f-73169155af95

Below is a related post, for your reference:

https://www.tenforums.com/tutorials/84095-change-storage-space-storage-pool-windows-10-a.html

(Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.)

Thanks for your time!
Best Regards,
Anne

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Answer 2

The sector size of most disks are either 512 or 4096 bytes. While the cluster size(allocation unite size) of a filesystem can be larger. For example, for ReFS you can choose either 4k or 64k.

When you create a storage pool, you can control logical sector size. You can set it to either 4096 or 512. Like,

New-StoragePool –FriendlyName main –StorageSubsystemFriendlyName "Windows Storage*" –PhysicalDisks (Get-PhysicalDisk –CanPool $True) -ResiliencySettingNameDefault Parity -LogicalSectorSizeDefault 4096

I haven't seen anything larger.

When you created a virtual disk on top of the storage pool, then you can create your volume and set cluster size to 64k there.