Shared PERC Controllers
For VRTX systems shipped with two PERC controllers, the second PERCs may have been disabled. In this
mode the chassis does not operate in Fault Tolerant mode. The system then operates as a single Shared
PERC system with only one active controller operating in Performance mode.
From the RACADM Command Line Interface, run theracadm raid get controllers command to list
the number of Shared PERC controllers on your system. If the command lists only
RAID.ChassisIntegrated.1-1, your system has a single Shared PERC controller. If the command lists
RAID.ChassisIntegrated.1-1and RAID.ChassisIntegrated.2-1, your system has two Shared
PERC controllers.
For systems with two Shared PERC installed, you can change the operation mode from Performance
mode to Fault Tolerant mode, or contrariwise using the Web Interface or the RACADM CLI.
To change the operation mode using the CMC Web Interface, go to the Controllers Troubleshooting
page by navigating to Chassis Overview → Storage Controllers, in the left pane and select the Disable
Raid Controller or Enable Raid Controller option.
To change the operational mode using the RACADM CLI:
• Run the racadm raid enableperc:RAID.ChassisIntegrated.2-1 command to select Fault
Tolerant Shared PERC mode.
• Run the racadm raid disableperc:RAID.ChassisIntegrated.2-1 command to select
Performance mode.
NOTE: The chassis must be turned on and all server modules must be turned off before you run the
enable or disable commands. The chassis is automatically power cycled as part of this operation.
After changing the Shared PERC operation mode, it is recommended to reset the CMC using the
Troubleshooting page or the racadm racreset command.
Enabling or Disabling RAID Controller Using CMC Web
Interface
For a VRTX chassis with two Shared PERC8 controllers, the Integrated 2 PERC adapter can be disabled or
enabled when the Integrated 1 PERC adapter is active and all server modules are turned off. Both
adapters must be enabled for fault-tolerance. The Controllers Troubleshooting page allows you to
enable or disable the peer controller.
NOTE: To prevent loss of data, before performing controller enable or disable operations:
• Complete all data operations such as Rebuild or Copy Back.
• Make sure that the data volumes are in optimal state.
NOTE: While enabling the second PERC adapter, a warning message is displayed and the fault-
tolerant status is degraded if:
• Any of the PERC adapter settings are changed.
• Firmware is updated.
Make sure that the firmware and the settings of the shared PERC match to set the fault tolerant
system configuration to Fault Tolerant mode.
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