Andrew Walker <awalker@xxxxxxxxxxxxx> writes: > On my Windows server I mounted multiple NTFS volumes within the same > share and played around until I was able to create directories with > the same fileid number. Did you try it with 'noserverino' mount option? For more information, see mount.cifs(8). Did it work with older kernels? > Windows identifies mounted volumes via reparse point: > https://learn.microsoft.com/en-us/windows/win32/fileio/determining-whether-a-directory-is-a-volume-mount-point Perhaps we could conditionally stop trusting file ids sent by the server as we currently do for hardlinks when we see these reparse points as well.