How to identify the ASM DiskGroup attached to which disks?
Hi guys,.In RAC 11 GR 2, how to identify which ASM Diskgroup is attached to which disks... (OS is RHEL 5.4).
We could list ASM starts by,
*#oracleasm listdisks * but this command does not display the disks assigned to ASM DiskGroup.
Even for check location of OCR and voting disks only show Diskgroup name and not the actual discs.
$ocrcheck
$crsctl query css votedisk
(as in gr 10, 2 RAC, we entered /etc/rules.d/udev/60-raw-rules raw file mapping of the OCR, voting disk and other ASM Diskgroup)
Please help me, as long as the customer place, I could see LUN as assigned to the server and get is not an exact idea whose records have been used for OCR and voting disk DATA Diskgroup.
Thank you
Manish
And for this, you can use oracleasm querydisk. Using that you can identify which device marked for asm or not. for example you can see below the example.
[oracle@localhost init.d]$ sqlplus "/as sysdba"
SQL*Plus: Release 10.2.0.4.0 - Production on Thu Jun 3 11:52:12 2010
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select path from v$asm_disk;
PATH
--------------------------------------------------------------------------------
/dev/oracleasm/disks/VOL2
/dev/oracleasm/disks/VOL1
SQL> exit;
[oracle@localhost init.d]$ su
Password:
[root@localhost init.d]# /sbin/fdisk -l
Disk /dev/sda: 80.0 GB, 80000000000 bytes
255 heads, 63 sectors/track, 9726 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 1305 10482381 83 Linux
/dev/sda2 1306 9401 65031120 83 Linux
/dev/sda3 9402 9662 2096482+ 82 Linux swap / Solaris
/dev/sda4 9663 9726 514080 5 Extended
/dev/sda5 9663 9726 514048+ 83 Linux
Disk /dev/sdb: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 4859 39029886 83 Linux
/dev/sdb2 4860 9729 39118275 83 Linux
[root@localhost init.d]# ./oracleasm querydisk /dev/sdb1
Device "/dev/sdb1" is marked an ASM disk with the label "VOL1"
[root@localhost init.d]# ./oracleasm querydisk /dev/sdb2
Device "/dev/sdb2" is marked an ASM disk with the label "VOL2"
[root@localhost init.d]# ./oracleasm querydisk /dev/sda1
Device "/dev/sda1" is not marked as an ASM disk
[root@localhost init.d]#
Also in windows:
C:\Documents and Settings\comp>asmtool -list
NTFS \Device\Harddisk0\Partition1 140655M
ORCLDISKDATA1 \Device\Harddisk0\Partition2 4102M
ORCLDISKDATA2 \Device\Harddisk0\Partition3 4102M
NTFS \Device\Harddisk0\Partition4 152617M
C:\Documents and Settings\comp>
answered by Alex.
Reference:-How to identify what disc rawdevice is named as VOL1 in ASM OS level
Happy new year.
Kind regards
Tags: Database
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