Perform a dump of the current system’s databases.
Before the upgrade, run dbcc commands (checktable, checkalloc, checkcatalog).
Alter the sybsystemprocs database.
Perform a pre-upgrade verification.
Upgrade the test system to Release 12.5.
Run dbcc commands (checktable, checkalloc, checkcatalog) on the Release 12.5 databases. Be sure to verify the dbcc log and error log.
“Baseline” the Release 12.5 configuration.