最近在redhat AS 4和 redhat 5上面使用裸裝置建庫，發現者兩者的裸裝置的配置，不一致。記錄一下。

AS 4下：

新增裸裝置：

1、新增原始磁碟

在虛擬機器磁碟部分新增即可

2、使用fdisk -l檢視磁碟，可以看到一塊未分配的磁碟。

[root@RHEL4-32-227 ~]# fdisk -l

Disk /dev/sda: 53.6 GB, 53687091200 bytes

255 heads, 63 sectors/track, 6527 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sda1 * 1 13 104391 83 Linux

/dev/sda2 14 6527 52323705 8e Linux LVM

Disk /dev/sdb: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

3、fdisk /dev/sdb 分割槽，對於scsi硬碟只能有15個分割槽，IDE可以有63個

4、fdisk -l

Disk /dev/sdb: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdb1 1 98 787153+ 83 Linux

/dev/sdb2 99 172 594405 83 Linux

/dev/sdb3 173 234 498015 83 Linux

/dev/sdb4 235 1305 8602807+ 5 Extended

/dev/sdb5 235 296 497983+ 83 Linux

/dev/sdb6 297 303 56196 83 Linux

/dev/sdb7 304 310 56196 83 Linux

/dev/sdb8 311 335 200781 83 Linux

/dev/sdb9 336 360 200781 83 Linux

/dev/sdb10 361 385 200781 83 Linux

/dev/sdb11 386 410 200781 83 Linux

/dev/sdb12 411 435 200781 83 Linux

/dev/sdb13 436 460 200781 83 Linux

/dev/sdb14 461 704 1959898+ 83 Linux

5、vi /etc/sysconfig/rawdevices修改如下：

加入

/dev/raw/raw1 /dev/sdb1

/dev/raw/raw2 /dev/sdb2

/dev/raw/raw3 /dev/sdb3

/dev/raw/raw4 /dev/sdb5

/dev/raw/raw5 /dev/sdb6

/dev/raw/raw6 /dev/sdb7

/dev/raw/raw7 /dev/sdb8

/dev/raw/raw8 /dev/sdb9

/dev/raw/raw9 /dev/sdb10

/dev/raw/raw10 /dev/sdb11

/dev/raw/raw11 /dev/sdb12

/dev/raw/raw12 /dev/sdb13

/dev/raw/raw13 /dev/sdb14

6、給與oracle使用者更改裸裝置的許可權：

chown -R oracle:oinstall /dev/raw

chmod -R 660 /dev/raw

7、把使用者許可權在啟動時給使用者

在etc/rc.local檔案中新增

chown oracle:oinstall /dev/raw -R

chmod 660 /dev/raw –R

chmod a+x /dev/raw

刪除裸裝置

#raw /dev/raw/raw1 0 0

#raw /dev/raw/raw2 0 0

查詢裸裝置

#raw -qa

開啟裸裝置服務

#chkconfig --list |grep raw

#chkconfig --level 2 raw on

#service rawdevices start

[root@RHEL4-32-227 ~]# raw -qa

/dev/raw/raw1: bound to major 8, minor 17

/dev/raw/raw2: bound to major 8, minor 18

/dev/raw/raw3: bound to major 8, minor 19

/dev/raw/raw4: bound to major 8, minor 21

/dev/raw/raw5: bound to major 8, minor 22

/dev/raw/raw6: bound to major 8, minor 23

/dev/raw/raw7: bound to major 8, minor 24

/dev/raw/raw8: bound to major 8, minor 25

/dev/raw/raw9: bound to major 8, minor 26

/dev/raw/raw10: bound to major 8, minor 27

/dev/raw/raw11: bound to major 8, minor 28

/dev/raw/raw12: bound to major 8, minor 29

/dev/raw/raw13: bound to major 8, minor 30

=====================================

redhat 5下面：

只是第五步不同；

vim /etc/udev/rules.d/60-raw.rules

新增如下內容：

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=="sdb5", RUN+="/bin/raw /dev/raw/raw4 %N"

ACTION=="add", KERNEL=="sdb6", RUN+="/bin/raw /dev/raw/raw5 %N"

ACTION=="add", KERNEL=="sdb7", RUN+="/bin/raw /dev/raw/raw6 %N"

ACTION=="add", KERNEL=="sdb8", RUN+="/bin/raw /dev/raw/raw7 %N"

ACTION=="add", KERNEL=="sdb9", RUN+="/bin/raw /dev/raw/raw8 %N"

ACTION=="add", KERNEL=="sdb10", RUN+="/bin/raw /dev/raw/raw9 %N"

ACTION=="add", KERNEL=="sdb11", RUN+="/bin/raw /dev/raw/raw10 %N"

ACTION=="add", KERNEL=="sdb12", RUN+="/bin/raw /dev/raw/raw11 %N"

ACTION=="add", KERNEL=="sdb13", RUN+="/bin/raw /dev/raw/raw12 %N"

ACTION=="add", KERNEL=="sdb14", RUN+="/bin/raw /dev/raw/raw13 %N"

KERNEL=="raw[1-9]", OWNER="oracle", GROUP="oinstall", MODE="0660"

修改完成執行 start_udev即可。

linux下新增裸裝置

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