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No Server or Chassis Maintenance
Do not remove the hardware that contains the endpoint or perform any maintenance on it until the update
process has completed. If the hardware is removed or otherwise unavailable due to maintenance, the
firmware update fails. This failure may corrupt the backup partition. You cannot update the firmware on
an endpoint with a corrupted backup partition.
Caution
Avoid Replacing RAID-Configured Hard Disks Prior to Upgrade
Under the following circumstances, Cisco UCS Manager may scrub all data on a hard disk as part of the RAID
synchronization process during an upgrade of the server firmware:
• The hard disks in the server are configured for RAID.
• One or more of the RAID-configured hard disks in the server are removed.
• The hard disk or disks are replaced with hard disks that are configured with a pre-existing RAID and
the local disk configuration policy included in the service profile on the server is not used to configure
those hard disks.
• The server firmware is upgraded, causing the server to reboot and Cisco UCS Manager to begin the
RAID synchronization process.
If the original hard disks contained vital data that needs to preserved, avoid inserting new hard disks that are
already configured for RAID.
Always Upgrade Cisco UCS Gen-2 Adapters through a Host Firmware Package
You cannot upgrade Cisco UCS Gen-2 adapters directly at the endpoints. You must upgrade the firmware on
those adapters through a host firmware package.
Cannot Upgrade Cisco UCS 82598KR-CI 10-Gigabit Ethernet Adapter
The firmware on the Cisco UCS 82598KR-CI 10-Gigabit Ethernet Adapter (N20-AI0002), Intel-based adapter
card, is burned into the hardware at manufacture. You cannot upgrade the firmware on this adapter.
Number of Fabric Interconnects
For a cluster configuration with two fabric interconnects, you can take advantage of the failover between the
fabric interconnects and perform a direct firmware upgrade of the endpoints without disrupting data traffic.
However, you cannot avoid disrupting data traffic for those endpoints which must be upgraded through a host
or management firmware package.
For a standalone configuration with a single fabric interconnect, you can minimize the disruption to data traffic
when you perform a direct firmware upgrade of the endpoints. However, you must reboot the fabric interconnect
to complete the upgrade and, therefore, cannot avoid disrupting traffic.
Firmware- and Software-Related Best Practices for Upgrades
Before you upgrade any endpoint, consider the following guidelines and best practices:
Cisco UCS Manager GUI Configuration Guide, Release 2.0
190 OL-25712-04
Firmware Upgrades