SentinelRAID Installation and Hardware Reference Manual
♦When replacing any of the controller components, it is necessary to access the controller board in controller canister. It is recommended that all power to the controller canister is turned off when maintenance procedures are being carried out.
♦If the DIMM module, controller board or daughter board fail, the maintenance operations must be completed as soon as possible.
♦If either the BBU module or the BBU charger board fail, it is not necessary to perform maintenance operations immediately. Because all I/O access to the controller will be shut off for the duration of the maintenance procedure, it is recommended that you carefully select the time when maintenance operations will be carried out.
5.2.Replacing a failed DIMM Module
5.2.1When should a DIMM module be replaced?
There are two instances when a DIMM module should be replaced:
♦Case 1: DIMM module fails
If a DIMM module fails it must be replaced immediately. The controller cannot function without a DIMM module and is therefore rendered inoperable. In this instance, DIMM module replacement becomes a priority and must be replaced as soon as possible.
♦Case 2: DIMM module with larger capacity required
If the capacity of the currently installed DIMM module is not sufficient, it can be replaced with a larger capacity DIMM module. In this instance, it is best to replace the DIMM module during the least busy time as the controller will have to be powered down and removed.
5.2.2DIMM Module Replacement Procedure
Step 1. Power off the controller. Prior to removing the controller module, it is necessary to power off the controller.
Step 2. Access the controller module. The DIMM module is located on the controller board. To replace the DIMM module, remove the chassis top cover and open the chassis. The complete removal procedure is described in Chapter 2, Section 2.6.2.
Step 3. Remove the optional daughter board. If an optional daughter board has been installed, it must be removed. The DIMM module is located beneath the daughter board. See Section 5.4.2 below.
Replacing a failed DIMM Module |