How To Determinate If An EMCPOWER Partition Is Valid For ASMLIB

If you are trying to create an ASMLIB disk using an emcpower# partition and you get the next error:
ASM disk: asmtool: Device "/dev/emcpowera11" is not a partition [FAILED]

Then you will need to determinate if the emcpower# partition is valid.


解决步骤如下：
In order to confirm the emcpower# partition is valid:

1) Check if you can create a tablespace directly on the block partition:

[root@dbaasm ~]# cd /dev
[root@dbaasm dev]# ls -l emcpowerd1
brw-rw---- 1 root disk 3, 19 Apr 29 16:00 emcpowerd1
[root@dbaasm dev]# chmod 777 emcpowerd1
[root@dbaasm dev]# ls -l emcpowerd1
brwxrwxrwx 1 root disk 3, 19 Apr 29 16:00 emcpowerd1
[root@dbaasm dev]# exit

dbaasm.us.oracle.com:/u01/app/oracle/11.1/db:TEST:oracle>sqlplus “/as
sysdba”

SQL*Plus: Release 11.1.0.6.0 - Production on Thu May 1 09:09:02 2008

Copyright (c) 1982, 2007, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> create tablespace test datafile '/dev/emcpowerd1' size 100M;

Tablespace created.

2) If so, then drop the previous tablespace.

3) Then check if a diskgroup can be created directly on the block partition:
Connect as root and execute:

# dd if=/dev/zero of='/dev/emcpowerb1' bs=8192 count=12800
Then connect as oracle, and then connect to the ASM instances and execute:

SQL> alter system set asm_diskstring = '/dev/emcpowerb1' scope=memory;

SQL> create diskgroup TEST external redundancy disk '/dev/emcpowerb1';
Diskgroup created.

4) If the tablespace and diskgroup can be create directly on the block partition then this could be a problem with ASMLIB configuration. Therefore you will need to check if the correct ASMLIB rpms were installed.

5) Alternatively, you can check if the problem is reproducible on another emcpower# partition or ask the SA to recreate the original one.





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