> Not so simply in a database of 30Gb, that takes 2 days to move data.

2 days for 30gb? Are your servers 10 years old? My mini-notebook can
do it twice faster.

> All databases i have in my customers are dialect 1, and i was thinking to use gfix to move to dialect 3.

After that backup-restore is required anyway to convert data and you
still may have problems with stored objects (procedures and triggers).

The only reliable way to migrate database is recreate it from scratch.

SY, SD.