SMB2 QFid Support

mrosebro — Wed, 04 Jun 2025 19:29:31 GMT

Hi:

I have a customer who has contacted Microsoft in regards to some performance issues. MSFT have come back asking if their CIFS storage supports SMB2 Qfid. As far as I can tell, it references the following article:

https://msdn.microsoft.com/en-us/library/cc246504.aspx

MB2_CREATE_QUERY_ON_DISK_ID

0x51466964

("QFid")

The client is requesting that the server return a 32-byte opaque BLOB that uniquely identifies the file being opened on disk. No data is passed to the server by the client.

The customer is connecting to NetApp storage (clustered OnTap 8.2.3P6). I am unable to find any references to this anywhere in documentation or the NetApp support site. The only reference I could find was in the file access guide for 7-mode version 7.x in which it simply states it is not supported as they could find no reason for using it. Anyone here have any knowledge of this? Thanks.

-Mike-

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SMB2 QFid Support