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Question
Saturday, February 24, 2018 10:08 PM
I created a storage pool with 4k sector size using 3 SSDs, each 5GB in size. These are the command I used:
$disks = (Get-PhysicalDisk | Where CanPool -eq 'True')
$storageSubsystemName = (Get-StorageSubSystem | Select -First 1).Name
$storagePool = (New-StoragePool -StorageSubsystemName
$storageSubsystemName -FriendlyName 'Test_StoragePool' -PhysicalDisks $disks -FaultDomainAwarenessDefault 'PhysicalDisk' -LogicalSectorSizeDefault 4096)
After that, I tried creating a virtual disk with 3 columns and interleave size of 4k.
$virtualDisk = (New-VirtualDisk -StoragePoolFriendlyName 'Test_StoragePool' -FriendlyName 'Test_VirtualDisk' -ResiliencySettingName 'Simple' -UseMaximumSize -NumberOfColumns 3 -Interleave 4096)
This did not work, I got the following error:
New-VirtualDisk : The value for Interleave is outside of the supported range of values.
Activity ID: {b48c36f7-ab70-4c9c-b489-c9b5d49ead66}
At line:1 char:17
....
I re-ran the same command with interleave size as multiples of 4k, I kept getting the same error till 12k but was able to create the virtual disk with 16k.
I'd like to understand if there is a minimum limit on the interleave size or if it is related to the sector size.
Any help is appreciated. Thanks.
All replies (1)
Monday, February 26, 2018 3:07 AM
Hi Khusbu,
Based on my understanding, the default interleave size of 256 KB. Interleave represents the amount of data written to a single column per stripe. And we could specifies the interleave value to use during the creation of a virtual disk.
May I ask all the drives you add to the pool are 4K native drives and your create the new storage pool, right?
And according to the Microsoft, the desired size of a data strip on a single physical disk in a striping based resiliency setting. This value must be between the values of the InterleaveMin and InterleaveMax properties of the MSFT_ResiliencySetting object. Maybe you could refer to the articles below.
https://msdn.microsoft.com/en-us/library/windows/desktop/hh830539(v=vs.85).aspx
https://msdn.microsoft.com/en-us/library/windows/desktop/hh830538(v=vs.85).aspx
Best Regards,
Mary
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