NEC Express5800/R320a-E4 User Manual page 258

5-98 Installing and Using Utilities
Figure 2. Splitting the System
When you split the system, the Active Upgrade Console disables any Rapid Disk ReSync (RDR)
mirroring between the internal disks in each CPU/IO module enclosure and isolates the Upgrade
Side from system resources such as the network, any user-specified application data disks, and any
external PCI resources (such as external storage). It also disables user-specified applications and
services on the Upgrade Side so they cannot restart if you restart the Upgrade Side.
Meanwhile, the Production Side retains access to system resources and continues to run your
applications uninterrupted.
5. After the system successfully enters split mode, you establish a remote connection to the
Upgrade Side of the system through the private network that exists between management LAN
adapters dedicated to BMC and between Ethernet PCI adapters in each CPU/IO module
enclosure. Using this remote connection, you can perform any of the following upgrade tasks
on the Upgrade Side:
•
Run software installation utilities and updaters (see "Software
Upgrade Support" on page 5-104 for restrictions).
•
Restart the operating system, if necessary.
•
Perform limited testing of the installed updates (the Upgrade Side has
no access to the network, external storage, or application data disks
during this stage).
You can also completely abort the upgrade from the Active Upgrade Console, if necessary.