ASM ：/dev/emcpowera 绑定UDEV 来做ASM 磁盘

我的存储是EMC的，装上多路径软件之后

[root@chnap-itd64 rules.d]# fdisk -l

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sda: 3597.3 GB, 3597303545856 bytes
255 heads, 63 sectors/track, 437347 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

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1      267350  2147483647+  ee  GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdc: 2147.5 GB, 2147483648000 bytes
255 heads, 63 sectors/track, 261083 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

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1      261084  2097151999+  ee  GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdb: 2147.5 GB, 2147483648000 bytes
255 heads, 63 sectors/track, 261083 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

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1      261084  2097151999+  ee  GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/sdd'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdd: 2147.5 GB, 2147483648000 bytes
255 heads, 63 sectors/track, 261083 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

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1      261084  2097151999+  ee  GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/sde'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sde: 2147.5 GB, 2147483648000 bytes
255 heads, 63 sectors/track, 261083 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

   Device Boot      Start         End      Blocks   Id  System
/dev/sde1               1      261084  2097151999+  ee  GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/emcpowera'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/emcpowera: 2147.5 GB, 2147483648000 bytes
255 heads, 63 sectors/track, 261083 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

         Device Boot      Start         End      Blocks   Id  System
/dev/emcpowera1               1      261084  2097151999+  ee  GPT


如果用下面的这种方式编辑规则文件，udev设置是可以出来的

more 99-oracle-asmdevices.rules

KERNEL=="sdb1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d /dev/$parent", RESULT=="36006016076f32e00745442a6f862e211", NAME="asm-disk1", OWNER="grid", GRO
UP="asmadmin", MODE="0660"

[root@chnap-itd64 rules.d]# /sbin/start_udev
正在启动 udev：[确定]

[root@chnap-itd64 rules.d]# ls -l /dev/asm-disk*
brw-rw---- 1 grid asmadmin 8, 17 1月  28 20:00 /dev/asm-disk1

目前我想用 /dev/emcpowera 这个设备绑定
但是没有成功，是不是我的99-oracle-asmdevices.rules
这个文件的写法不对。

多路径软件装上之后一般/dev/emcpowera不会变，
虽然用/dev/sdb也可以绑定，也没有影响，但是我想
用/dev/emcpowera设备在多台服务器上绑定

[root@chnap-itd64 rules.d]# vi 99-oracle-asmdevices.rules

KERNEL=="emcpowera1", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d /dev/$parent", RESULT=="36006016076f32e00745442a6f862e211", NAME="asm-disk1", OWNER="grid", GROUP="asmadmin", MODE="0660"

[root@chnap-itd64 rules.d]# /sbin/start_udev
正在启动 udev：[确定]
[root@chnap-itd64 rules.d]# /sbin/start_udev
[root@chnap-itd64 rules.d]# ls -l /dev/as*
ls: 无法访问/dev/as*: 没有那个文件或目录

原来在linux6 里面如果要用这种方法做ASM的话。
需要在/etc/udev/rules.d 目录上新增了50-udev.rules 文件，
redhat 5 下面就有这个文件，到redhat 6下就没了
并把下列信息加入50-udev.rules，现在在oracle上已经可以正常安装asm了
[root@chnap-itd65 rules.d]# cat 50-udev.rules
SUBSYSTEM=="block", KERNEL=="emcpowera1", GROUP="asmadmin", OWNER="grid", MODE="0660"
SUBSYSTEM=="block", KERNEL=="emcpowera2", GROUP="asmadmin", OWNER="grid", MODE="0660"
SUBSYSTEM=="block", KERNEL=="emcpowera3", GROUP="asmadmin", OWNER="grid", MODE="0660"
SUBSYSTEM=="block", KERNEL=="emcpowera4", GROUP="asmadmin", OWNER="grid", MODE="0660"

[root@chnap-itd65 rules.d]# start_udev
正在启动 udev：[确定]
[root@chnap-itd65 rules.d]# ls -l /dev/emc*
crw-rw---- 1 root root 10, 58 1月 29 19:33 /dev/emcpower
brw-rw---- 1 root disk 120, 0 1月 29 19:33 /dev/emcpowera
brw-rw---- 1 grid asmadmin 120, 1 1月 29 19:33 /dev/emcpowera1
brw-rw---- 1 grid asmadmin 120, 2 1月 29 19:33 /dev/emcpowera2
brw-rw---- 1 grid asmadmin 120, 3 1月 29 19:33 /dev/emcpowera3
brw-rw---- 1 grid asmadmin 120, 4 1月 29 19:33 /dev/emcpowera4

重启udev的时候权限已经正常了
ASM可以正常配置使用了

该问题已经解决。

总结：已经有了emcpower，那直接在rc.local中修改权限就好了，不用udev了。