Redhat5.8 X64创建裸设备
Redhat5.8 X64创建裸设备
1) 裸设备建立在sdb上
# fdisk -l
Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 268 2048287+ 82 Linux swap / Solaris
/dev/sda3 269 2610 18812115 83 Linux
Disk /dev/sdb: 16.1 GB, 16106127360 bytes
255 heads, 63 sectors/track, 1958 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdb doesn't contain a valid partition table
2) 创建分区
# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.
The number of cylinders for this disk is set to 1958.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1958, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-1958, default 1958): +1024M
//分1GB
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
3) 查看分区
# fdisk -l
Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 268 2048287+ 82 Linux swap / Solaris
/dev/sda3 269 2610 18812115 83 Linux
Disk /dev/sdb: 16.1 GB, 16106127360 bytes
255 heads, 63 sectors/track, 1958 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 125 1004031 83 Linux
4) 利用分区创建PV
# pvcreate /dev/sdb1
Writing physical volume data to disk "/dev/sdb1"
Physical volume "/dev/sdb1" successfully created
5) 查看PV信息
# pvdisplay /dev/sdb1
"/dev/sdb1" is a new physical volume of "980.50 MB"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size 980.50 MB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID KhQgMz-onKa-6gAL-Nybp-jt59-ux7O-CItJef
6) 创建VG
# vgcreate oravg /dev/sdb1
Volume group "oravg" successfully created
查看VG
# vgs
VG #PV #LV #SN Attr VSize VFree
oravg 1 0 0 wz--n- 980.00M 980.00M
7) 创建LV
# lvcreate -n test_lv -L 512M oravg
# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
test_lv oravg -wi-a- 512.00M
# ls -l /dev/oravg/
total 0
lrwxrwxrwx 1 root root 25 Oct 20 22:39 test_lv -> /dev/mapper/oravg-test_lv
lvremove /dev/oravg/ test_lv --删除lv
8) 绑定裸设备
# raw /dev/raw/raw1 /dev/mapper/oravg-test_lv
/dev/raw/raw1: bound to major 253, minor 0
--注意，之前是没有/dev/raw目录的，执行后会自动创建
查询裸设备
# raw -qa
/dev/raw/raw1: bound to major 253, minor 0
9) 给新创建的裸设备增加权限，以使oracle能使用
# chown -R oracle:oinstall /dev/mapper/oravg-test_lv
重启权限会丢失，写到开机启动里
vi /etc/rc.d/rc.local
chown -R oracle:oinstall /dev/mapper/oravg-test_lv
10) 为了保证重启后，可以挂载裸设备，修改下面文件，添加内容
# vi /etc/sysconfig/rawdevices
/dev/raw/raw1 /dev/mapper/oravg-test_lv
重启裸设备服务，查看设备是否存在
# /etc/init.d/rawdevices restart
Assigning devices:
/dev/raw/raw1 --> /dev/mapper/oravg-test_lv
/dev/raw/raw1: bound to major 253, minor 0
done
[root@oracle mapper]# ls -l /dev/mapper/
total 0
crw------- 1 root root 10, 60 Oct 20 22:28 control
brw-rw---- 1 oracle oinstall 253, 0 Oct 20 22:39 oravg-test_lv
11) 创建ORACLE表空间
SQL> create tablespace test datafile '/dev/mapper/oravg-test_lv';
Tablespace created.
SQL> select file_name,tablespace_name,bytes/1024/1024 MB from dba_data_files;
FILE_NAME TABLESPACE_NAME MB
----------------------------------- ------------------------------ ----------
/u01/oradata/oral/system01.dbf SYSTEM 700
/u01/oradata/oral/sysaux01.dbf SYSAUX 560
/u01/oradata/oral/undotbs01.dbf UNDOTBS1 890
/u01/oradata/oral/users01.dbf USERS 5
/dev/mapper/oravg-test_lv TEST 511.992188
-- SQL> drop tablespace test; --裸设备上drop表空间，不需要带including ... and ... ，否则会连裸设备也删除了
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/26217983/viewspace-1123876/ ，如需转载，请注明出处，否则将追究法律责任。
