Question 1. Tip: If the content of the file is wrong, it will not appear in the /dev/huawei directory. At this time, you need to modify it correctly, delete the device in the directory, and re-execute start_udev
KERNEL=="sd*", BUS=="scsi", PROGRAM=="/sbin/scsi_id -g -u -d /dev/$name", RESULT=="3618ded7100c077ffbbb30928000007a6", NAME="huawei/data01",
start_udev
cd /dev/huawei
rm -rf data02 ocr
Question 2. Note: When prompted “cannot communicate with Cluster Ready Services”
CRS-4000: Command Status failed, or completed with errors.
When, use the root user to check and start the crs service
Start cluster service
[root@racdb1 ~]# cd /u01/app/11.2.0/grid/bin/
[root@racdb1 bin]# ./crsctl start crs
CRS-4640: Oracle High Availability Services is already active
CRS-4000: Command Start failed, or completed with errors.
[root@racdb1 bin]#
[root@racdb1 bin]# ./crsctl check crs
CRS-4638: Oracle High Availability Services is online
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4529: Cluster Synchronization Services is online
CRS-4533: Event Manager is online
[root@racdb1 bin]#
Both nodes need to be executed
[root@racdb1 bin]# ./crsctl start cluster -n racdb1
CRS-2672: Attempting to start 'ora.asm' on 'racdb1'
CRS-2676: Start of 'ora.asm' on 'racdb1' succeeded
CRS-2672: Attempting to start 'ora.crsd' on 'racdb1'
CRS-2676: Start of 'ora.crsd' on 'racdb1' succeeded
[root@racdb1 bin]#
Note: As long as the cluster services of 2 nodes are started, all services will be normal again. If only one node is started, only the services of this node will be started when the resource service is started.
Finally start all services
[root@racdb1 bin]#./crsctl start res -all
Question 3. It prompts address already in use, just go to the device catalog to delete the device, and then execute again.
Question 4, start a single service on the specified host
crsctl start res ora.LISTENER.lsnr -n racdb2
