本文中的示例说明了如何使用 udev（非 ASMLIB）配置分区的 Linux 块设备并将它们分配给 ASM 作为候选成员磁盘。

1. 本示例在 CentOS 6.6 配置（ASM 版本 11.2.0.4 64 位）上执行：

$ uname -a
Linux onitroad 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux

$ cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 6.6 (Santiago)

2. 在 Linux 配置中识别新磁盘：

$ ls -l  /dev/xvdv
brw-rw---- 1 root disk 202, 5376 Nov 11 21:31 /dev/xvdv

3. 在其上创建一个新的磁盘分区：

#  fdisk  /dev/xvdv
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xba335ded.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').
Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-261, default 1): 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-261, default 261): 
Using default value 261
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.

# partprobe

4. 在新分区（/dev/xvdv1）上设置新的UDEV规则如下：

# vi /etc/udev/rules.d/99-oracle-asmdevices.rules
KERNEL=="xv*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -s %p", RESULT=="360a98000375331796a3f434a55354474", NAME="asmdisk1_udev_p1", ACTION=="add|change", OWNER="grid", GROUP="asmadmin", MODE="0660"

5. 重新加载并重启udev规则：

# udevadm control --reload-rules

# start_udev
Starting udev:                                             [  OK  ]

注意：运行“start_udev”将导致网络热插拔操作应用于主机上没有设置 HOTPLUG=no 的每个接口配置文件。
这将激活任何没有设置 HOTPLUG=no 的接口，无论 ONBOOT 设置如何。
如果我们想避免这种情况，请确保每个 ifcfg 文件都设置了 HOTPLUG=no。

6. 确保使用正确的所有权（grid & asmadmin）和权限（brw-rw—-）创建新的 udev 分区设备：

# ls -ltr /dev/asm*
brw-rw---- 1 grid asmadmin 202, 5377 Nov 11 21:47 /dev/asmdisk1_udev_p1

7. 现在我们可以使用它来创建新磁盘组或者将其添加到现有磁盘组中，如下所示：

# su - grid
$ . oraenv
ORACLE_SID = [grid] ? +ASM
The Oracle base has been set to /u01/app/grid

$ sqlplus "/as sysasm"
SQL> show parameter asm_diskstring
NAME                                 TYPE        VALUE
------------------------------------ ----------- -----------------------------
asm_diskstring                       string

SQL> alter system set asm_diskstring = '/dev/asmdisk1_udev_p1' scope=both;
System altered.

SQL> show parameter  asm_diskstring
NAME                                 TYPE        VALUE
------------------------------------ ----------- -----------------------------
asm_diskstring                       string       /dev/asmdisk1_udev_p1

SQL> select path from v$asm_disk where path like '%udev%';
PATH
-------------------------------------------------------------------------------
/dev/asmdisk1_udev_p1

SQL> create diskgroup UDEVDG external redundancy disk '/dev/asmdisk1_udev_p1'  ;
Diskgroup created.