OCI data source service packs for OCI 7.1.x and earlier:
Are .msi based, and need to be installed via a remote desktop console
Need to be installed on the OCI operational server AND all OCI Remote Acquisition Units
The service pack installation will restart the "SANscreen Server" and "SANscreen Acq" service.
So, there will be a minor interruption in OCI availability
OCI data source service packs are .patch files, installable via a web browser.
Service packs are installed only on the OCI operational server
The OCI operational service only needs to restart all "SANscreen Acq" services, and it does so automatically.
So, on 7.2.x and higher, service packs are much easier to install.