[单选]
A database is stored in an Automatic Storage Management (ASM) disk group, disk group, DGROUP1 with SQL:
There is enough free space in the disk group for mirroring to be done.
What happens if the CONTROLLER1 failure group becomes unavailable due to error of for maintenance?（）

A . Transactions and queries accessing database objects contained in any tablespace stored in DGROUP1 will fall.
B . Mirroring of allocation units will be done to ASM disks in the CONTROLLER2 failure group until the CONTROLLER1 for failure group is brought back online.
C . The data in the CONTROLLER1 failure group is copied to the controller2 failure group and rebalancing is initiated.
D . ASM does not mirror any data until the controller failure group is brought back online, and newly allocated primary allocation units (AU) are stored in the controller2 failure group, without mirroring.
E . Transactions accessing database objects contained in any tablespace stored in DGROUP1 will fail but queries will succeed.

View the Exhibit to examine the output for the CROSSCHECK BACKUP command. Which statement is true about the output of the command（） The backup piece is expired as the new backup is available.。 The backup piece is expired because the operating-system file was not found.。 The backup piece is expired because the retention period for the backup has expired.。 The backup piece is expired because the backup set to which it belongs is not complete.。调概准备工作越早实施越好。基站内部应至少提供（）二孔、一个三孔的电源插座，插座前端有漏电保护设施。一个。二个。三个。四个。绿荫树类（庭荫树类） You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for the RMAN. To accomplish the backup， you issued the following RMAN command： RMAN> BACKUP SECTION SIZE 300M TABLESPACE users； Which two statements are true regarding the execution of the above command？（） The RMAN parallelizes the backup although the parallelism is not set for a channel.。 The backup piece size will be limited to 300 MB.。 The operation is accomplished using the default channel available.。 Three channels for the tape drive must be configured by setting the parallelism to three.。

A database is stored in an Automatic Storage Management (ASM) disk group, disk group, DGROUP1 with SQL:
There is enough free space in the disk group for mirroring to be done.
What happens if the CONTROLLER1 failure group becomes unavailable due to error of for maintenance?（）

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[单选] A database is stored in an Automatic Storage Management (ASM) disk group, disk group, DGROUP1 with SQL: There is enough free space in the disk group for mirroring to be done. What happens if the CONTROLLER1 failure group becomes unavailable due to error of for maintenance?（）

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[单选]
A database is stored in an Automatic Storage Management (ASM) disk group, disk group, DGROUP1 with SQL:
There is enough free space in the disk group for mirroring to be done.
What happens if the CONTROLLER1 failure group becomes unavailable due to error of for maintenance?（）