Which initialization parameter in an ASM instance specifies the disk groups to be automatically
mounted at instance startup?
A. ASM_DISKMOUNT
B. ASM_DISKGROUP
C. ASM_DISKSTRING
D. ASM_MOUNTGROUP
The initialization parameter ASM_DISKGROUP,valid only in an ASM instance,specifies the
disk groups to be automatically mounted when the ASM instance starts.ASM_DISKSTRING is
operating system-dependent and restricts the file-system devices that can be used to create
disk groups.ASM_DISKMOUNT and ASM_MOUNTGROUP are not valid initialization parameters.
原文：http://www.cnblogs.com/Babylon/p/7798453.html