Hi,
The easiest way to move logshipped database
1)Stop logshipping
use master
alter database [xxx] set offline
alter database [xx] modify file (name=xxx_log, FILENAME='some_path\xxx_log.ldf')
2)Physically move log files to path 'some_path'
3)alter database [xxx] set online
6)Resume logshipping
Cheers,
Marcin