When attempting to run an online integrity check, or a backup on a large database (i.e. large data files), you may run into this error:

Error: 5123, Severity: 16, State: 1.CREATE FILE encountered operating system error 665(failed to retrieve text for this error. Reason: 15105) while attempting to open or create the physical file 'D:\MSSQL\Data\db.mdf:MSSQL_DBCC9'.

Further investigation reveals that the error 665 is in fact: The requested operation could not be completed due to a file system limitation.

Backup and consistency (dbcc) check operations requires the creation of a database snapshot. These snapshots are created as sparse files, which only works on NTFS (not ReFS), but has some l  ...