上一篇介绍的是普通设备做为raw裸设备的制作方法，现在简单介绍下，使用lv来做raw裸设备绑定步骤。

二、LV设备做成raw裸设备

依旧拿RedFlag DC Server 5.0 和Asianux 3.0系统来做实验，因为udev版本不同，所以，设置方法也会不同。

前提：
有三个lv设备，/dev/mapper/vg1-lv–raw1、 /dev/mapper/vg1-lv–raw2、 /dev/mapper/vg1-lv–raw3 ，将这三个设备分别做成raw1、raw2、raw3，属主是oracle，属组是dba，权限是0640。

1、RedFlag DC Server 5.0 SP4 (内核2.6.9-89.5AXS2)
(1) raw设备绑定
依旧使用 rawdevices 配置文件来控制。
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[root@localhost ~]#vi /etc/sysconfig/rawdevices
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# This file and interface are deprecated.
# Applications needing raw device access should open regular
# block devices with O_DIRECT.
# raw device bindings
# format: <rawdev> <major> <minor>
# <rawdev> <blockdev>
# example: /dev/raw/raw1 /dev/sda1
# /dev/raw/raw2 8 5
/dev/raw/raw1 /dev/mapper/vg1-lv–raw1
/dev/raw/raw2 /dev/mapper/vg1-lv–raw2
/dev/raw/raw3 /dev/mapper/vg1-lv–raw3
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(2) 赋加权限
权限的控制，依旧在udev下的permissions.d 目录中设置，找到下面类似信息，进行修改：
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# raw devices
ram*:root:disk:0660
#raw/*:root:disk:0660
raw/*:oracle:dba:0640
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(3) 重启udev服务，使其生效
修改完配置后，可以执行
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[root@localhost ~]#start_udev
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我们来看下效果：
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[root@localhost ~]# cd /dev/raw
[root@localhost raw]# ll
total 0
crw-r—– 1 oracle dba 162, 1 Feb 26 17:39 raw1
crw-r—– 1 oracle dba 162, 2 Feb 26 17:39 raw2
crw-r—– 1 oracle dba 162, 3 Feb 26 17:39 raw3
[root@localhost raw]# raw -qa
/dev/raw/raw1: bound to major 253, minor 2
/dev/raw/raw2: bound to major 253, minor 3
/dev/raw/raw3: bound to major 253, minor 4
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2、Asianux 3.0 SP2 (内核 2.6.18-128.7AXS3)
(1) raw设备绑定
依旧是udev来管理。
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[root@localhost rules.d]# vi 60-raw.rules
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# 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.
KERNEL!="dm-[0-9]*", GOTO="skip_dm"
PROGRAM!="/sbin/dmsetup ls –exec /bin/basename -j %M -m %m", GOTO="skip_dm"
RESULT=="vg1-lv–raw1", RUN+="/bin/raw /dev/raw/raw1 /dev/mapper/vg1-lv–raw1"
RESULT=="vg1-lv–raw2", RUN+="/bin/raw /dev/raw/raw2 /dev/mapper/vg1-lv–raw2"
RESULT=="vg1-lv–raw3", RUN+="/bin/raw /dev/raw/raw3 /dev/mapper/vg1-lv–raw3"
LABEL="skip_dm"
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还需要修改一处地方，但这处地方由于版本不同，而位置有所不同

Asianux3sp1(2.6.18-53.11)时，需要修改 /etc/udev/rules.d/50-udev.rules 文件，找到如下内容进行修改：
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#KERNEL=="dm-[0-9]*", ACTION=="add", OPTIONS+="ignore_device"
KERNEL=="dm-[0-9]*", ACTION=="add"
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Asianux3sp2(2.6.18-128.7)以上，需要修改 /etc/udev/rules.d/90-dm.rules 文件，找到如下内容进行修改：
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#KERNEL=="dm-[0-9]*", ACTION=="add", OPTIONS+="ignore_device"
KERNEL=="dm-[0-9]*", ACTION=="add"
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(2) 赋加权限
权限的控制，依旧在udev下的60-raw.rules文件修改：
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# 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.
KERNEL!="dm-[0-9]*", GOTO="skip_dm"
PROGRAM!="/sbin/dmsetup ls –exec /bin/basename -j %M -m %m", GOTO="skip_dm"
RESULT=="vg1-lv–raw1", RUN+="/bin/raw /dev/raw/raw1 /dev/mapper/vg1-lv–raw1"
RESULT=="vg1-lv–raw2", RUN+="/bin/raw /dev/raw/raw2 /dev/mapper/vg1-lv–raw2"
RESULT=="vg1-lv–raw3", RUN+="/bin/raw /dev/raw/raw3 /dev/mapper/vg1-lv–raw3"
LABEL="skip_dm"
KERNEL=="raw1", OWNER=="oracle", GROUP=="dba", MODE=="0640"
KERNEL=="raw2", OWNER=="oracle", GROUP=="dba", MODE=="0640"
KERNEL=="raw3", OWNER=="oracle", GROUP=="dba", MODE=="0640"
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(3) 重启udev服务，使其生效
修改完配置后，可以执行
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[root@localhost ~]#start_udev
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看看是否生效：
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[root@localhost raw]# ll
total 0
crw-r—– 1 oracle dba 162, 1 Jun 17 13:21 raw1
crw-r—– 1 oracle dba 162, 2 Jun 17 13:21 raw2
crw-r—– 1 oracle dba 162, 3 Jun 17 13:21 raw3
[root@localhost raw]# raw -qa
/dev/raw/raw1: bound to major 253, minor 2
/dev/raw/raw2: bound to major 253, minor 3
/dev/raw/raw3: bound to major 253, minor 4
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