文档解释
ORA-15246: cannot bring ASM disk string both online and then offline in the same statement
Cause: An attempt was made to bring the specified disk both online and offline in the same statement.
Action: Revise the statement to either bring the disk online or take the disk offline.
ORA-15246：在同一个语句中无法将ASM磁盘同时设置为ONLINE和OFFLINE。这是一个ORACLE的ASM的错误，表示在同一个语句中无法将ASM磁盘设置为ONLINE和OFFLINE。
