QUESTION 169
When starting up your ASM instance, you receive the following error:
SQL> startup pfile=?/dbs/init+ASM.ora ASM instance started
Total System Global Area 104611840 bytes
Fixed Size 1298220 bytes
Variable Size 78147796 bytes
ASM Cache 25165824 bytes
ORA-15032: not all alterations performed
ORA-15063: ASM discovered an insufficient number ofdisks for disk group "DGROUP3"
ORA-15063: ASM discovered an insufficient number ofdisks for disk group "DGROUP2"
ORA-15063: ASM discovered an insufficient number ofdisks for disk group "DGROUP1"
In trying to determine the cause of the problem, you issue this query:
SQL> show parameter asm
NAME TYPE VALUE
------------------------------------ ----------- -------------------------_
asm_allow_only_raw_disks boolean FALSE
asm_diskgroups string DGROUP1, DGROUP2, DGROUP3
asm_diskstring string
asm_power_limit integer 1
asm_preferred_read_failure_groups string
What is the cause of the error?
A. The ASM_DISKGROUPS parameter is configured for three disk groups: DGROUP1, DGROUP2, and
DGROUP3. The underlying disks for these disk groups have apparently been lost.
B. The format of the ASM_DISKGROUPS parameter is incorrect.It should reference the disk group numbers,
not the names of the disk groups
C. The ASM_POWER_LIMIT parameter is incorrectly set to 1. It should be set to the number of disk groups
being attached to the ASM instance.
D. The ASM_DISKSTRING parameter is not set; therefore disk discovery is not possible.
E. There is insufficient information to solve this problem.
Answer: D
同531题：http://blog.csdn.net/rlhua/article/details/14124467
Explanation/Reference:
Section: Managing Database Performance & Tuning