You can replace SAN Volume Controller 2145-8F2, SAN Volume Controller 2145-8F4,
or SAN Volume Controller 2145-8A4 nodes
with SAN Volume Controller 2145-8A4 or SAN Volume Controller 2145-CF8 nodes. The
following procedures are disruptive, because you move VDisks to a
new I/O group.
This task assumes the following:
- The cluster software is at 5.1.0
or higher
- Your cluster contains six or less nodes
- All nodes that are configured in the cluster are present
- All errors in the cluster error log are fixed
- All managed disks (MDisks) are online
- You have a 2145 UPS-1U unit
for each new SAN Volume Controller 2145-8G4 node.
Perform the following steps to replace nodes:
- (If the cluster software
version is at 5.1, complete this step.)
Confirm that no hosts have dependencies
on the node.
When shutting down a
node that is part of a cluster, or when deleting the node from a cluster,
use the Show Dependent VDisks menu option on
the Viewing Nodes panel in the SAN Volume Controller
Console to display all the VDisks that are dependent on a node, or
use the svcinfo lsnodedependentvdisk command to
view dependent VDisks.
If dependent
VDisks exist, determine if the VDisks are being used. If the VDisks
are being used, either restore the redundant configuration or suspend
the host application. If a dependent quorum disk is reported, repair
the access to the quorum disk or modify the quorum disk configuration.
- Quiesce all I/O from the hosts that
access the I/O groups of the nodes that you are replacing.
- Add two replacement nodes to the cluster to create a new
I/O group.
- Rezone your switch zones to add the ports of the new nodes
to the host and storage zones.
- Move all of the VDisks from the I/O group of the nodes
that you are replacing to the new I/O group.
- From each host, issue a rescan
of the multipathing software to discover the new paths to VDisks.
The host multipathing device drivers take approximately 30 minutes
to recover the paths.
- See the documentation that is provided with your multipathing
device driver for information on how to query paths to ensure that
all paths have been recovered before proceeding to the next step.
- Delete the nodes that you are replacing
from the cluster and remove the ports from the switch zones.
- Repeat steps 2 to 8 for
each node in the cluster that you want to replace.