ORA-15063: ASM discovered an insufficient number of disks for diskgroup
概述ASMdiskheader是ASMdisk的第一个块,即AU#0BLOCK#0,diskheader中记录了ASMdisk的重要信息,比如ASMdisk名字,diskgroup名字,failuregroup名字,AUsize等等.通过视图v$asm_diskgroup和v$asm_disk查看:selectgroup_number,disk_number,mount_status,header