It take it you are trying to copy the file from the operating system…..? If so how are you accessing the server?Are you able to check by connecting as QSECOFR to see if the restirction is just your account access?
Or are you doing a Domino COPY….. file >database > new copy etc
If this is the case then I would guess your are not a full administrator to the Domino environment. As you do not have access to the database. 2Gb issue???? If this is the size restriction in Domino well there is a compact switch that will allow a database to increase to 4Gb (I seem to think that was a version 4 restriction not 5 (but that was a long time ago).
Now the size of the log.nsf… You should not be keeping all the log information for ever as this causes no end of issue. You should only keep about 7 to 14 days depending on your needs.This is done using the replication settings to delete anything after a number of days…. This might help you with maintaining the log.nsf from getting to big.
How to stop Domino on an iSeries
1: Via the Domino Console
2: Stopping the Subsystem etc.
3: via the WRK Domserv lists.
I hope this helps.