ocp-v13-531

QUESTION 531
When starting up your ASM instance, you receive the following error:

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.

Correct Answer: D

启动ASM实例，如下错误：

原因是
D . ASM_DISKSTRING 参数没有设置，不可能发现磁盘
答案是:D

http://docs.oracle.com/cd/B19306_01/server.102/b14237/initparams011.htm#REFRN10248

ASM_DISKSTRING Initialization Parameter Note: Only Automatic Storage
Management instances support the ASM_DISKSTRING initialization
parameter. The syntax for assigning a value to the ASM_DISKSTRING
initialization parameter is as follows: ASM_DISKSTRING =
‘path1’[,’path2’, …] In this syntax, pathn is the path to a raw
device. You can use wildcard characters when specifying the path.