Failed disks are taken offline immediately but are not dropped.
Disk data is never lost.
By default， the failed disk is not dropped from the disk group ever， protecting you from loss of that disk.
The failed disk is automatically reformatted and then resynchronized to speed up the recovery process.
Hot spare disks are automatically configured and added to the disk group.
第1题：
The ORACLE_SID environment variable is set to +ASM. ASMLIB is not used in the configuration. You executed the following command to startup the Automatic Storage Management (ASM) instance.SQL> STARTUP;Which two activities are performed during a successful start up operation?（）
A. The databases configured to use the ASM instance are mounted
B. The disk groups are mounted as per the ASM_DISKGROUPS initialization parameter
C. ASM starts the Oracle Cluster Synchronization Services (CSS) daemon if it is not started
D. ASM discovers and examines the contents of all files that are in the paths specified in the ASM_DISKGROUPS initialization parameters
第2题：
Which two are the uses of the ASM metadata backup and restore （AMBR） feature？（）
第3题：
A. ALTER DISKGROUP data CHECK;
B. ALTER DISKGROUP data CHECK DISK;
C. ALTER DISKGROUP data CHECK FILE;
D. ALTER DISKGROUP data CHECK DISK IN FAILURE GROUP 1;
第4题：
You execute the following command to start an Automatic Storage Management （ASM） instance： SQL>STARTUP； In which of the following modes will the ASM instance start？（）
第5题：
You are managing Oracle Database 11g with an ASM storage with high redundancy. The following command was issued to drop the disks from the dga disk group after five hours： ALTER DISKGROUP dga OFFLINE DISKS IN FAILGROUP f2 DROP AFTER 5H； Which statement is true in this scenario？（）
第6题：
A. The metadata used to track extents in SGA is reduced.
B. Rebalance operations are completed faster than with a fixed extent size
C. An ASM Instance automatically allocates an appropriate extent size.
D. Resync operations are completed faster when a disk comes online after being taken offline.
E. Performance improves in a stretch cluster configuration by reading from a local copy of an extent.
第7题：
Which initialization parameter in an ASM instance specifies the disk groups to be automatically mounted at instance startup？（）
第8题：
You are managing an Oracle 11g database with ASM storage, for which the COMPATIBLE initialization parameter is set to 11.1.0. In the ASM instance, the COMPATIBLE.RDBMS attribute for the disk group is set to 10.2 and the COMPATIBLE.ASM attribute is set to 11.1.Which two statements are true in this scenario for the features enabled for ASM? （）
A. The ASM-preferred mirror read feature is enabled.
B. The ASM supports variable sizes for extents of 1, 8, and 64 allocation units.
C. The ASM disk is dropped immediately from a disk group when it becomes unavailable.
D. The RDBMS always reads the primary copy of a mirrored extent of the ASM disk group.
第9题：
You support Oracle Database 12c Oracle Database 11g, and Oracle Database log on the same server. All databases of all versions use Automatic Storage Management (ASM). Which three statements are true about the ASM disk group compatibility attributes that are set for a disk group?（）
第10题：
You want to perform the following operations for the DATA ASM disk group： -Verify the consistency of the disk. -Cross-check all the file extent maps and allocation tables for consistency. check whether the alias metadata directory and file directory are linked correctly. -Check that ASM metadata directories do not have unreachable allocated blocks. Which command accomplishes these tasks（）？