I create 4 standby redo log groups, and use LGWR in primary site to transfer redo data, all are good. But when I query the V$STANDBY_LOG view, I found that only the status column of GROUP# 4(the first group of my standby redo logs) value is "ACTIVE" while all the others(5-7) are "UNASSIGNED". also, only GROUP# 4's sequence# is a value greate than 0 and THREAD# is 1, all others are 0 and 0. Any explains. -- Kamus <kamusis@xxxxxxxxx> 那么多1G的邮箱,我能用来干什么:-) A Oracle8i & 9i Certified DBA from China -- //www.freelists.org/webpage/oracle-l