Welcome to the Unity 25-Drive Disk Array Enclosure Link Control Card Replacement demonstration. For more detailed instructions always refer to the applicable procedure on support.emc.com.
To begin, we’re going to log into Unisphere using the admin account. As we can see on the Unity dashboard in the system health window, there are no hardware issues reported.
Let’s navigate to the system view and click the enclosures tab and then select the DAE or a Disk Array Enclosure. In this case there is one DAE on bus one.
Shown here is a rear view of a 25-Drive DAE. Let’s select LCC B on the top for more details. Although there are no errors or alerts shown here we’re going to replace LCC B.
To begin the replacement procedure navigate to the system service page and then select service tasks. In order to replace an LCC, we must first put its associated storage processor in service mode.
Confirm that the enter service mode button for SP B is highlighted and then click execute. When prompted, enter the service password. Entering service mode stops IO on the SP so that the LCC can be safely replaced.
Wait until the SP fault LED is flashing alternating amber and blue before continuing to the next task. Here we can see that SP B is in service mode.
Start by removing the SAS cable connected to the LCC by gently pulling the connector latches to release the cable from the connector. Locate the orange handle buttons on the LCC handles.
Press the orange handle buttons to release the LCC. Pull the latches outward and remove the LCC from its slot. Pull off the latches on the replacement LCC and align the LCC with the enclosure opening and gently push it straight into the opening.
Press the latches to secure the LCC to the DAE. Now replace the SAS cable. Now let’s log back into Unisphere so we can reboot the SP. Let’s log back into Unisphere with the admin account so that we can reboot SP B.
Here on the Unisphere dashboard we can see we have some hardware issues. These are expected errors. Let’s click on the hardware error to confirm.
Here we can see SP A and SP B are reporting errors. If we select SP A we can see that it is reporting that it is in an unsafe to remove condition.
If we click SP B we can see that it is in service mode. Since these are both expected errors we can now go back to the service tasks page and reboot SP B.
This action will reboot SP B into normal mode. Select reboot for SP B and then click on execute. When prompted enter the service password.
It may take up to 20 minutes for the system to complete its reboot to return to normal. After approximately 20 minutes log out and log back into Unisphere to refresh the view.
Let’s check the LCC status by navigating to the system view, clicking the enclosures tab and selecting the DAE. We can see here now the LCC B is operating normally. This completes the unity 25- Drive DAE LCC replacement demonstration.
