Perhaps you wish to look into HADR on DB2. It actually does log shipping to the standby, so if there is a fail over you can either manually take over on the standby, or if you install TSA (Tivoli Systems Automation), then you can have it detect a failure and automatically fail over to the standby.
If you don't want HADR, then yes, you could copy logs. Or even use the alternate/mirror log/archive parameters to get DB2 to copy the logs (possibly to a shared mount).
