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aodu(At Oracle Database Utility)之asmdisk

oracle自从10g退出ASM之后,现在生产环境中使用ASM的场景越来越多。有时可能会发生对磁盘的误操作,导致ASM磁盘的损坏,这对数据库来说是致命的。如果有工具能查看磁盘是否是ASM使用的磁盘,这样会更方便,更安全。

如果一块磁盘用作ASM,那么Oracle就会在磁盘的头部表示出来,字符是ORCLDISK,包括Windows和所用Unix平台。可以通过od -N 128 -c <设备全路径>查看,这个命令是通用的,适用所用unix平台,当然aodu也可以实现。


注意:创建ASM磁盘后,想在使用,必须删除(通过asmca或命令行),或者通过dd清除设备头部即可。

dd if=/dev/zero of=/dev/hdiskpower10 bs=1024 count=10



通过aodu查看
[root@ohs1 linux]# ./aodu

At Oracle Database Utility,Release 1.1.0 on Tue Jun 14 11:35:09 2016
Copyright (c) 2014, 2015, Robin.Han.  All rights reserved.
http://ohsdba.cn
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AODU>

AODU> asmdisk /dev/sdb1
The disk /dev/sdb1 still used by ASM.
AODU> asmdisk /dev/sdb2
The disk /dev/sdb2 still used by ASM.
AODU> asmdisk /dev/sdb11
The disk /dev/sdb11 still used by ASM.
AODU> asmdisk /dev/sdb12
The disk /dev/sdb12 has been used by ASM.
AODU> asmdisk /dev/sdb13
The disk /dev/sdb13 has not been used by ASM.
AODU>  asmdisk /dev/sdb14
The disk /dev/sdb14 has been used by ASM.
AODU> asmdisk /dev/sdb15
The disk /dev/sdb15 still used by ASM.
AODU> asmdisk /dev/sdb16
/dev/sdb16: Bad file descriptor
AODU>

AIX是可以使用lquerypv查看,非常方便
$ lquerypv -h /dev/hdiskpower1


00000000   00000000 00000000 00000000 00000000  |................|
00000010   00000000 00000000 00000000 00000000  |................|
00000020   00000000 00000000 00000000 00000000  |................|
00000030   00000000 00000000 00000000 00000000  |................|
00000040   00000000 00000000 00000000 00000000  |................|
00000050   00000000 00000000 00000000 00000000  |................|
00000060   00000000 00000000 00000000 00000000  |................|
00000070   00000000 00000000 00000000 00000000  |................|
00000080   00000000 00000000 00000000 00000000  |................|
00000090   00000000 00000000 00000000 00000000  |................|
000000A0   00000000 00000000 00000000 00000000  |................|
000000B0   00000000 00000000 00000000 00000000  |................|
000000C0   00000000 00000000 00000000 00000000  |................|
000000D0   00000000 00000000 00000000 00000000  |................|
000000E0   00000000 00000000 00000000 00000000  |................|
000000F0   00000000 00000000 00000000 00000000  |................|
$
用作ASM后,可以看到
#lquerypv -h /dev/hdiskpower0
00000000   00820101 00000000 80000000 9FD017BD  |................|
00000010   00000000 00000000 00000000 00000000  |................|
00000020   4F52434C 4449534B 00000000 00000000  |ORCLDISK........|
00000030   00000000 00000000 00000000 00000000  |................|
00000040   0B200000 00000203 53595354 454D4447  |. ......SYSTEMDG|
00000050   5F303030 30000000 00000000 00000000  |_0000...........|
00000060   00000000 00000000 53595354 454D4447  |........SYSTEMDG|
00000070   00000000 00000000 00000000 00000000  |................|
00000080   00000000 00000000 53595354 454D4447  |........SYSTEMDG|
00000090   5F303030 30000000 00000000 00000000  |_0000...........|
000000A0   00000000 00000000 00000000 00000000  |................|
000000B0   00000000 00000000 00000000 00000000  |................|
000000C0   00000000 00000000 01F81331 E1851000  |...........1....|
000000D0   01F81332 005A5C00 02001000 00100000  |...2.Z\.........|
000000E0   0001BC80 00001000 00000002 00000001  |................|
000000F0   00000002 00000002 00000000 00000000  |................|
#

Linux上没有这个好用的工具,可以通过od查看
[root@ohs1 /]# od --read-bytes=128 --format=c /dev/sdb1
0000000 001 202 001 001  \0  \0  \0  \0  \0  \0  \0 200 310   ;   U   [
0000020  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000040   O   R   C   L   D   I   S   K   A   S   M   D   I   S   K   1
0000060  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000100  \0  \0      \v  \0  \0 002 003   S   Y   S   T   E   M   D   G
0000120   _   0   0   0   0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000140  \0  \0  \0  \0  \0  \0  \0  \0   S   Y   S   T   E   M   D   G
0000160  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000200

[root@ohs1 ~]# dd if=/dev/sdb1 bs=128 count=1|od -c
1+0 records in
1+0 records out
128 bytes (128 B) copied, 2.9095e-05 seconds, 4.4 MB/s
0000000 001 202 001 001  \0  \0  \0  \0  \0  \0  \0 200 310   ;   U   [
0000020  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000040   O   R   C   L   D   I   S   K   A   S   M   D   I   S   K   1
0000060  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000100  \0  \0      \v  \0  \0 002 003   S   Y   S   T   E   M   D   G
0000120   _   0   0   0   0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000140  \0  \0  \0  \0  \0  \0  \0  \0   S   Y   S   T   E   M   D   G
0000160  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000200

[root@ohs1 ~]#
[root@ohs1 /]# od -N 128 -t c /dev/sdb1
0000000 001 202 001 001  \0  \0  \0  \0  \0  \0  \0 200 310   ;   U   [
0000020  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000040   O   R   C   L   D   I   S   K   A   S   M   D   I   S   K   1
0000060  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000100  \0  \0      \v  \0  \0 002 003   S   Y   S   T   E   M   D   G
0000120   _   0   0   0   0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000140  \0  \0  \0  \0  \0  \0  \0  \0   S   Y   S   T   E   M   D   G
0000160  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
0000200
[root@ohs1 /]#


关键词:aodu 

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