Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

Restoring communication between host and disks after cable
disconnection
If a fiber cable is inadvertently disconnected between the host and a disk, you can
restore communication between the host and the disk without restarting.
To restore lost cable communication between host and disk
1
Reconnect the cable.
2
On all nodes, use the ioscan -funC disk command to scan for new disks.
It may take a few minutes before the host is capable of seeing the disk.
3
On all nodes, issue the following command to rescan the disks:
# vxdisk scandisks
4
On the master node, reattach the disks to the disk group they were in and
retain the same media name:
# vxreattach
This may take some time. For more details, see vxreattach (1M) manual page.
Shared disk group cannot be imported
If you see a message resembling:
vxvm:vxconfigd:ERROR:vold_pgr_register(/dev/vx/rdmp/disk_name):
local_node_id<0
Please make sure that CVM and vxfen are configured
and operating correctly
First, make sure that CVM is running. You can see the CVM nodes in the cluster
by running the vxclustadm nidmap command.
# vxclustadm nidmap
Name CVM Nid CM Nid State
galaxy 1 0 Joined: Master
nebula 0 1 Joined: Slave
This above ouput shows that CVM is healthy, with system galaxy as the CVM
master. If CVM is functioning correctly, then the output above is displayed when
CVM cannot retrieve the node ID of the local system from the vxfen driver. This
usually happens when port b is not configured.
221Troubleshooting SF Oracle RAC
Troubleshooting CVM