Disk " disk " does not exist or is not instantiated after reboot the server

Question

Hi,
I have one issue with 11gR2 cluster. I have 2 node cluster on CentOS 5.5. I am using HP MSA 1000 storage LUNs and create disk group and volume for RAC setup in openfiler.
The whole setup was running fine but before few days some one has recreate the database [clusterDB] using control file. I can see this from alter.log file of "oracle" user. And somehow one node is not able to up and running.
I have no idea what is going on so just restart both the nodes and storage one by one.
After restarting I can not view my ASM disk from /usr/sbin/oracleasm listdisks.
EvenI can not see the ASMdisk from /dev/oracleasm/disks... also I try to querydisk it showing that "Disk "<diskname>" does not exist or is not instantiated"
From the master node I can see the cluster registry configuration through "ocrcheck -config"
*./ocrcheck -config*
Oracle Cluster Registry configuration is :
Device/File Name : +ACFSDG
from the slave when I run the ocrcheck ...it gives error
PROT-602: Failed to retrieve data from the cluster registry
PROC-26: Error while accessing the physical storage ASM error [SLOS: cat=8, opn=kgfolclcpi1, dep=210, loc=kgfokge
AMDU-00210: No disks found in diskgroup ACFSDG
AMDU-00210: No disks found in diskgroup ACFSDG
] [8]
Any idea what is the cause behind this? There are many errors in $GRID_HOME/log/<hostname>.log file and other referring file. I might be sure that until I enable the ASMDISK/detect the ASMDISK I can not start crs...
Shall I try with restore operation of OCR or replace option in ./ocrcheck...will it usefull?
Let me know if you have already face this issue.
Thanks...
Edited by: user12039625 on Nov 12, 2010 5:30 AM
Edited by: user12039625 on Nov 12, 2010 5:36 AM

Answer 1

Hi,
Thanks for your reply.
I have "/dev/sd*" in my both the RAC nodes and on storage machine it was showing as "/dev/dm-*" whenever I run " fdisk -l " command... and I did this through iscsi initiatior and target and also create "Create Persistent Local SCSI Device Names ".
I also create one script "iscsidev.sh" in /etc/udev and it was perfectly working. Before this issue I was restarted the server and confirm it.
script is below
==============
# FILE: /etc/udev/scripts/iscsidev.sh
BUS=${1}
HOST=${BUS%%:*}
[ -e /sys/class/iscsi_host ] || exit 1
file="/sys/class/iscsi_host/host${HOST}/device/session*/iscsi_session*/targetname"
target_name=$(cat ${file})
# This is not an open-scsi drive
if [ -z "${target_name}" ]; then
exit 1
fi
# Check if QNAP drive
check_qnap_target_name=${target_name%%:*}
if [ $check_qnap_target_name = "iqn.2004-04.com.qnap" ]; then
target_name=`echo "${target_name%.*}"`
fi
echo "${target_name##*.}"
==============
Thanks...
Edited by: user12039625 on Nov 12, 2010 6:04 AM