Linux Study之--通过udev创建ASM DISK（RAC共享存储)

客官°小女子只卖身不卖艺 2022-08-19 12:14 241阅读 0赞

**Linux Study之--通过udev创建ASM DISK（RAC共享存储)**

**系统环境：RedHat EL64**

**Oracle：   Oracle 11gR2**

** 在Oracle 11gR2，构建RAC时可以通过ASM创建asm disk，但是需要安装asmlib相关软件；对于RedHat EL64，Oracle的asm不能很好的支持，所以可以通过udev来创建asm disk，就不需要安装asmlib相关软件。**

**一、查看系统环境**

**内核版本：**

**\[root@rh64 rules.d\]\# uname -a**

**Linux rh64 2.6.32-358.el6.x86\_64 \#1 SMP Tue Jan 29 11:47:41 EST 2013 x86\_64 x86\_64 x86\_64 GNU/Linux**

**系统用户：**

**\[root@rh64 rules.d\]\# id grid**

uid=400(grid) gid=400(asmadmin) groups=400(asmadmin)

**二、创建共享磁盘（可以采用分区或独立的磁盘）**

\[root@rh64 ~\]\# fdisk -l

Disk /dev/sdc: 24.3 GB, 24323964928 bytes

255 heads, 63 sectors/track, 2957 cylinders

Units = cylinders of 16065 \* 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

**查看磁盘UUID:**

**\[root@rh64 ~\]\# /sbin/scsi\_id -g -u -d /dev/sdc**

**1ATA\_VBOX\_HARDDISK\_VB3d5ccb5e-9c197b67**

**磁盘分区：**

**\[root@rh64 ~\]\# fdisk -l**

Disk /dev/sdc: 24.3 GB, 24323964928 bytes

255 heads, 63 sectors/track, 2957 cylinders

Units = cylinders of 16065 \* 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xeb09f8d3

Device Boot      Start         End      Blocks   Id  System

**/dev/sdc1               1         915     7349706   83  Linux**

**/dev/sdc2             916        1830     7349737+  83  Linux**

**/dev/sdc3            1831        2957     9052627+  83  Linux**

**三、建立UDEV规则文件**

**\[root@rh64 ~\]\# cd /etc/udev/rules.d/**

\[root@rh64 rules.d\]\# ls

60-fprint-autosuspend.rules  60-raw.rules             80-kvm.rules   97-bluetooth-serial.rules

60-openct.rules              70-persistent-cd.rules   90-alsa.rules  98-kexec.rules

60-pcmcia.rules              70-persistent-net.rules  90-hal.rules   99-fuse.rules

**\[root@rh64 rules.d\]\# cat 99-oracle-asmdisk.rules**

KERNEL=="sdc1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d /dev/$parent", RESULT=="1ATA_VBOX_HARDDISK_VB3d5ccb5e-9c197b67", NAME="asm_disk1", OWNER="grid", GROUP="asmadmin", MODE="0660"
    KERNEL=="sdc2", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d  /dev/$parent", RESULT=="1ATA_VBOX_HARDDISK_VB3d5ccb5e-9c197b67", NAME="asm_disk2", OWNER="grid", GROUP="asmadmin", MODE="0660"
    KERNEL=="sdc3", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d  /dev/$parent", RESULT=="1ATA_VBOX_HARDDISK_VB3d5ccb5e-9c197b67", NAME="asm_disk3", OWNER="grid", GROUP="asmadmin", MODE="0660"

**四、启动udev service**

**载入配置文件****：**

**\[root@rh64 rules.d\]\# udevadm control --reload-rules**

**启动udev service：**

**\[root@rh64 rules.d\]\# start\_udev**

Starting udev:

**查看asm disks：**

\[root@rh64 rules.d\]\# ls -l /dev/asm\*

**brw-rw---- 1 grid asmadmin 8, 33 Jan 13 16:52 /dev/asm\_disk1**

**brw-rw---- 1 grid asmadmin 8, 34 Jan 13 16:52 /dev/asm\_disk2**

**brw-rw---- 1 grid asmadmin 8, 35 Jan 13 16:52 /dev/asm\_disk3**

**--------至此，asm disk创建成功 ！**