redhat linux通过udev创建裸设备 - Linux系统

1，建立/etc/sysconfig/rawdevices文件，然后从其他操作系统上拷贝/etc/init.d/rawdevices到本地机，修改 /etc/init.d/rawdevices文件中raw命令的具体位置，然后就可以通过/etc/init.d/rawdevices来启动和关闭 raw文件了。

2，上面的方法是redhat以前的raw管理的方法，虽然这样可以管理raw，但是毕竟不是太正规，redhat5正规的方法是通过udev来管理raw.

修改/etc/udev/rules.d/60-raw.rules文件，添加最后的两行测试：

[root@node1 ~]# cat /etc/udev/rules.d/60-raw.rules 
# This file and interface are deprecated. 
# Applications needing raw device access should open regular 
# block devices with O_DIRECT. 
# 
# Enter raw device bindings here. 
# 
# An example would be: 
#   ACTION=="add", KERNEL=="sda", RUN+="/bin/raw /dev/raw/raw1 %N"
# to bind /dev/raw/raw1 to /dev/sda, or 
#   ACTION=="add", ENV{MAJOR}=="8", ENV{MINOR}=="1", RUN+="/bin/raw /dev/raw/raw2 %M %m"
# to bind /dev/raw/raw2 to the device with major 8, minor 1. 
     
ACTION=="add",KERNEL=="sdb1",RUN+="/bin/raw /dev/raw/raw1 %N"
ACTION=="add",KERNEL=="sdb2",RUN+="/bin/raw /dev/raw/raw2 %N"
ACTION=="add",KERNEL=="sdb3",RUN+="/bin/raw /dev/raw/raw3 %N"
ACTION=="add",KERNEL=="sdb4",RUN+="/bin/raw /dev/raw/raw4 %N"
KERNEL=="raw[1-4]", OWNER="oracle", GROUP="oinstall", MODE="640"
     
[root@node1 ~]#

重启下服务：

[root@node1 ~]# start_udev 
Starting udev: [ OK ]

验证一下

[root@node1 ~]# ls /dev/raw/ -l 
total 0
crw-r----- 1 oracle oinstall 162, 1 Jun 6 17:57 raw1 
crw-r----- 1 oracle oinstall 162, 2 Jun 6 17:57 raw2 
crw-r----- 1 oracle oinstall 162, 3 Jun 6 17:57 raw3 
crw-r----- 1 oracle oinstall 162, 4 Jun 6 17:57 raw4

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