数据库版本信息 10.2.0.5，使用ASM管理方式
archive log filename=+FGA/mpac/archivelog/2016_02_14/thread_1_seq_8374.548.903790945 recid=16185 stamp=903790967
deleted archive log
archive log filename=+FGA/mpac/archivelog/2016_02_14/thread_1_seq_8375.741.903790965 recid=16186 stamp=903790984
deleted archive log
archive log filename=+FGA/mpac/archivelog/2016_02_14/thread_1_seq_8376.749.903790983 recid=16187 stamp=903791004
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of delete command on ORA_DISK_1 channel at 02/15/2016 01:33:59
ORA-15028: ASM file ‘+FGA/mpac/archivelog/2016_02_14/thread_2_seq_7869.289.903791005’ not dropped; currently being accessed

Recovery Manager complete.

10g 通过重启数据实例解决问题。

11g asmcmd可以通过 lsof -G FGA 去查找被什么占用了。