Trying to understand an ASM discrepancy

From: William Wagman <wjwagman_at_ucdavis.edu>
Date: Wed, 2 Apr 2008 17:06:25 -0700
Message-ID: <FE043305B38A0F448F3924429D650C2A071702F6@VEXBE2.ex.ad3.ucdavis.edu>

Greetings,

I am looking at a two node rac cluster running on 32-bit RHEL4, oracle 10.2.0.3.0 SE and am puzzled by a discrepancy in the description of the library and system as listed in the V$ASM_DISK view in the ASM instance. The ASM and RDBMS are installed in separate homes. On node 1 I see the following...

[root_at_spenser init.d]# ./oracleasm listdisks
VOL1
VOL2
VOL3 SQL> select library,path from v$asm_disk order by path; LIBRARY PATH

---

System            /dev/raw/raw1
System            /dev/raw/raw10
System            /dev/raw/raw2
System            /dev/raw/raw3
System            /dev/raw/raw5
System            /dev/raw/raw6
System            /dev/raw/raw7
System            /dev/raw/raw8
System            /dev/raw/raw9

On node 2 I see the following...

[root_at_hawk init.d]# ./oracleasm listdisks
VOL1
VOL2
VOL3 SQL> select library,path from v$asm_disk order by path;

LIBRARY PATH

---

System            /dev/raw/raw1
System            /dev/raw/raw10
System            /dev/raw/raw2
System            /dev/raw/raw3
System            /dev/raw/raw5
System            /dev/raw/raw6
System            /dev/raw/raw7
System            /dev/raw/raw8
System            /dev/raw/raw9

ASM Library - Generic Linux, version 2.0.2 (KABI_V2) ORCL:VOL1
ASM Library - Generic Linux, version 2.0.2 (KABI_V2) ORCL:VOL2
ASM Library - Generic Linux, version 2.0.2 (KABI_V2) ORCL:VOL3 As I understand it when the library is listed as system it means that the asm_diskstring parameter is not set correctly. The puzzling thing is that in the instance on each node it is set to null. The asm_diskgroup parameter is set the same on each node, 'ASMGRP1, ASMGRP2'. I don't understand what might have caused these to differ. If anyone can assist I would appreciate it.

Thanks.

Bill Wagman
Univ. of California at Davis
IET Campus Data Center
wjwagman_at_ucdavis.edu
(530) 754-6208

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Received on Wed Apr 02 2008 - 19:06:25 CDT