RAID Controller Module Mismatch

What Caused the Problem?

One of the RAID controller modules in this storage array is incompatible with the other RAID controller module. The Recovery Guru Details area provides specific information you will need as you follow the Recovery Steps.

Caution: Possible loss of data accessibility. Do not remove a component when either (1) the Service action (removal) allowed (SAA) field in the Details area of this recovery procedure is NO (), or (2) the SAA LED on the affected component is OFF (note that some products do not have SAA LEDs). Removing a component while its SAA LED is OFF may result in temporary loss of access to your data. Refer to the following Important Notes for more detail.

Caution: Electrostatic discharge can damage sensitive components. Use a grounding wrist strap or other anti-static precautions before removing or handling components.

Important Notes

You must correct this problem before the power is cycled on the storage array. You will not be able to access the storage array using the Array Management Window if the storage array boots with an incompatible RAID controller module.
The storage array currently does not have redundant RAID controller modules. The storage array will continue to operate with the remaining RAID controller module. However, failure of the remaining RAID controller module will result in a loss of access to the storage array. Therefore, make sure you correct this problem as soon as possible.
Depending on the model of your RAID controller module, the battery may be integrated inside the RAID controller module module, rather than residing in a separate module. If the RAID controller module you are replacing contains a battery, you may have to insert the battery from the old RAID controller module module into the new replacement RAID controller module module. Consult your hardware documentation for details.
Service Action Allowed Important Information:
- The Service action (removal) allowed field in the Details area indicates whether or not you can safely remove the component. If the SAA field is NO (), then the affected component must remain in place until you service another component first.
- The Service action LED on Component field in the Details area indicates whether or not a physical SAA LED is present on the hardware component. This field does NOT indicate whether the LED is ON or OFF (that indication is provided by the Service action (removal) allowed field).
- If a component does not have an SAA LED, then it is OK to remove the component when its fault LED is lit and the Service action (removal) allowed field = YES () in the Details area.
- The Service action (removal) allowed field shown in the Details area and the physical SAA LED on the hardware component (if supported) MUST match before you remove the affected component. In rare cases (such as multiple problems), the status of the LED and the SAA field may not match. If there is a mismatch, then you should NOT remove the component until these indications match.

Recovery Steps

Remove the incompatible RAID controller module. The incompatible RAID controller module (A or B) is listed in the Details area. Note that there is nothing wrong with the incompatible RAID controller module and that it may be compatible with another storage array. It can be used as a replacement for a RAID controller module that has the same replacement part number.

If...

Then...

You are using In-Band management of the storage array

(refer to the Network Management Type column in the Enterprise Management Window)

Go to step 2.

You are using Out-of-Band management of the storage array

(refer to the Network Management Type column in the Enterprise Management Window)

Before you insert a new RAID controller module module into the storage array, you must update the DHCP/BOOTP server so that it will associate the new RAID controller module's hardware Ethernet (MAC) address with the DNS/network name and IP address previously assigned to the removed RAID controller module.

To update the DHCP/BOOTP server, find the entry associated with the removed RAID controller module and replace its Ethernet (MAC) address with the new RAID controller module's Ethernet (MAC) address. The RAID controller module's Ethernet (MAC) address is located on an Ethernet ID label on the RAID controller module module in the form xx.xx.xx.xx.xx.xx.

When you are finished, go to step 2.

Check the replacement part number of the remaining RAID controller module and ensure that the new RAID controller module has the same replacement part number. Select the remaining RAID controller module in the physical view and then select the RAID Controller Module >> Properties menu option to view the replacement part number.

Depending on the model of your RAID controller module, the battery may be integrated inside the RAID controller module module, rather than residing in a separate module. If the RAID controller module you are replacing contains a battery, you may have to insert the battery from the old RAID controller module module into the new replacement RAID controller module module. Consult your hardware documentation for details.

If you do not have a RAID controller module with the appropriate replacement part number, contact your technical support representative.

Make sure at least 1 minute has elapsed. Then, insert the new (compatible) RAID controller module module firmly into place.

Check the status of the RAID controller module in the Array Management Window. The RAID controller module should have an optimal status.

If you have virtual disks mapped to hosts that have Automatic Virtual Disk Transfer (AVT) disabled, it may be necessary to redistribute the virtual disks to their preferred RAID controller module. Use the following steps to determine the AVT status of the hosts connected to your storage array:

Open the Storage Array Profile by selecting the Storage Array >> View >> Profile menu option from the Array Management Window. Then, select the Mappings tab.

Scroll to the NVSRAM Host Type Internal Definitions section.

If...

Then...

There are hosts mapped to virtual disks on this storage array that have an AVT status of disabled

There are hosts mapped to virtual disks on this storage array that are not running a host-based, multi-path failover driver

It may be necessary to redistribute the virtual disks to their preferred RAID controller module. If the Array Management Window's Advanced >> Recovery >> Redistribute Virtual Disks menu option is available, select the option.

Note: If you have a mix of hosts with AVT enabled and AVT disabled, all virtual disks will be immediately assigned back to their preferred path. However, until the host-based, multi-path failover driver detects the valid preferred path (may take several minutes), the virtual disks mapped to the AVT-enabled hosts may get temporarily returned back to the non-preferred path.

If the menu option is not available (grayed out), the virtual disks are already associated with their preferred RAID controller modules and no action is needed.

Go to step 6.

There are NO hosts mapped to virtual disks on this storage array with an AVT status of disabled

AND

All hosts mapped to virtual disks on this storage array are running a host-based, multi-path failover driver

No action is required.

If virtual disks need to be redistributed to their preferred RAID controller module, the host-based, multi-path failover driver will automatically initiate the transfer.

Note that detection of a restored preferred path by the multi-path failover driver can take several minutes.

Go to step 6.

Click the Recheck button to rerun the Recovery Guru. The failure should no longer appear in the Summary area. If the failure appears again, contact your technical support representative.