Typically, I use Process Monitor to determine if a data set is opened using SGIO. Look for the Create IRP in the Process Mon Log when the file is opened. If the NO_BUFFERING flag is present, then SGIO is being used.
In v9.3, there will be messages printed to the SAS Log to indicate that a SAS I/O file is using SGIO or if SGIO was disabled.
The 2025 SAS Hackathon has begun!
It's finally time to hack! Remember to visit the SAS Hacker's Hub regularly for news and updates.