KFOD (On ASMLIB) Is Reporting "<unknown> <unknown>" State For The "User" & "Group" Columns. (Doc ID 1436169.1)

Last updated on OCTOBER 11, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 11.2.0.3 [Release 10.2 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

1) ASM configurations on Linux using ASMLIB API.

2) kfod is reporting <unknown> state for the "User" & "Group" columns:

$ kfod asm_diskstring='ORCL:*' disk=all
--------------------------------------------------------------------------------
Disk Size Path User Group
================================================================================
1: 102398 Mb ORCL:DISK1 <unknown> <unknown>
2: 5115 Mb ORCL:DISK2 <unknown> <unknown>
3: 102398 Mb ORCL:DISK3 <unknown> <unknown>
4: 102398 Mb ORCL:DISK4 <unknown> <unknown>
5: 102398 Mb ORCL:DISK5 <unknown> <unknown>
6: 102398 Mb ORCL:DISK6 <unknown> <unknown>
7: 102398 Mb ORCL:DISK7 <unknown> <unknown>
8: 20489 Mb ORCL:DISK8 <unknown> <unknown>
9: 102398 Mb ORCL:DISK9 <unknown> <unknown>
10: 102398 Mb ORCL:DISK10 <unknown> <unknown>
11: 51209 Mb ORCL:DISK11 <unknown> <unknown>
--------------------------------------------------------------------------------
ORACLE_SID ORACLE_HOME
================================================================================
+ASM %GI_HOME

3) But ASMLIB API is correctly enabled and perfectly used by ASM, therefore ASM is using the ASMLIB layer (ASMLIB I/O calls) to access the physical disks as confirmed by the next queries:

SQL> select library from v$asm_disk;

LIBRARY
----------------------------------------------------------------
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)
ASM Library - Generic Linux, version 2.0.4 (KABI_V2)

11 rows selected.

SQL> show parameter asm

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
asm_diskgroups string DISKGROUP1, DISKGROUP2, DISKGROUP3
, DISKGROUP4, DISKGROUP5, DISKGROUP6
, DISKGROUP7, DISKGROUP8
asm_diskstring string ORCL:*
asm_power_limit integer 2
asm_preferred_read_failure_groups string
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Automatic Storage Management option

$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Wed Mar 14 21:21:46 2012

Copyright (c) 1982, 2011, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Automatic Storage Management option

SQL> select path from v$asm_disk;

PATH
--------------------------------------------------------------------------------
ORCL:DISK1
ORCL:DISK2
ORCL:DISK3
ORCL:DISK4
ORCL:DISK5
ORCL:DISK6
ORCL:DISK7
ORCL:DISK8
ORCL:DISK9
ORCL:DISK10
ORCL:DISK11

11 rows selected.

SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Automatic Storage Management option

Changes

Cause

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KFOD (On ASMLIB) Is Reporting "<unknown> <unknown>" State For The "User" & "Group" Columns. (Doc ID 1436169.1)

Applies to:

Symptoms

Changes

Cause

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