Node #1:

	crw-r 1 root sys 118, 40 Apr 2 15:00 /dev/rdsk/disk78

crw-r 1 root sys 118, 0 Apr 2 15:00 /dev/rdsk/disk79

crw-r 1 root sys 118, 42 Apr 2 15:00 /dev/rdsk/disk80

Create the alias:

	# mkdir /asmdisks

# chown oracle:dba  /asmdisks

# cd /asmdisks

	# mknod asmdisk1 c 118 40

# mknod asmdisk2 c 118 0

# mknod asmdisk3 c 118 42

Then you will have the next alias devices:

	/asmdisks/asmdisk1 

/asmdisks/asmdisk2 

/asmdisks/asmdisk3

You will need to set the correct ownership:

	# chown oracle:dba /asmdisks/asmdisk1

# chown oracle:dba /asmdisks/asmdisk2

# chown oracle:dba /asmdisks/asmdisk3

Node #2:

	crw-r?????? 1 root sys 118, 40 Apr 2 15:00 /dev/rdsk/disk78

crw-r?????? 1 root sys 118, 0 Apr 2 15:00 /dev/rdsk/disk79

crw-r?????? 1 root sys 118, 42 Apr 2 15:00 /dev/rdsk/disk80

Create the alias:

	# mkdir /asmdisks

# chown oracle:dba /asmdisks

# cd /asmdisks

	# mknod asmdisk1 c 118 46

# mknod asmdisk2 c 118 49

# mknod asmdisk3 c 118 15

Then you will have the next alias devices:

	/asmdisks/asmdisk1 

/asmdisks/asmdisk2 

/asmdisks/asmdisk3

You will need to set the correct ownership:

	# chown oracle:dba /asmdisks/asmdisk1

# chown oracle:dba /asmdisks/asmdisk2

# chown oracle:dba /asmdisks/asmdisk3

Then update the asm_diskstring pointing to the new alias devices one both ASM instances:

+ASM1 instance:

	SQL> alter system set asm_diskstring = '/asmdisks/asmdisk*' scope=spfile;

+ASM2 instance:

	SQL> alter system set asm_diskstring = '/asmdisks/asmdisk*' scope=spfile;

RAC中通过nkmod解决各个节点盘符不一致问题