Performing a Pre-expansion Check

Prerequisites

• You can log in to DeviceManager as the super administrator. Only a super administrator has expansion permission.
• The storage system is running correctly.
• You have obtained and recorded the WWN or IQN of the application server that uses the LUN and the WWN or LUN ID of the LUN. The LUN is correctly mapped to the application server and the host configuration on the storage system is correct.

Procedure

1. Log in to DeviceManager as the super administrator. Make sure that the storage environment meets the expansion requirement.
   1. In the Basic Information area on the home page, check the device status and total capacity. Ensure that the storage system runs properly and has sufficient storage space.

      If the device status is Fault, contact Huawei technical engineers to locate and troubleshoot the problem. Start the expansion after the fault is rectified.

   2. In the Alarms area, check current alarm information. Click Show All.

      The Alarms and Events page is displayed, listing all current alarms.

      If there are alarms related to the disk domain, storage pool, or LUN to be expanded, follow instructions in the Suggestion to handle the alarms. These alarms include Storage Pool Is Degraded, Disk Domain Is Faulty, and LUN Is Faulty.

2. On DeviceManager, confirm and record the host corresponding to the application server, the LUN to be expanded, and the LUN's owning storage pool.
   1. On the navigation bar of DeviceManager, click Provisioning.

      The Provisioning page is displayed.

   2. Click Host.

      The Host page is displayed.

   3. Based on the WWN or IQN of the application server you have recorded, find the host corresponding to the application server.
   4. Select the host and check whether its status is normal.

      If any alarm is found, clear it according to the handling suggestion.

   5. In the Mapped LUNs area, find the LUN to be expanded based on the LUN WWN or host LUN ID you have recorded. Record the LUN's capacity and owning storage pool.

   If the LUN WWN or host LUN ID is not displayed in the Mapped LUNs area, click and choose WWN or Host LUN ID from the drop-down list. The LUN WWN or host LUN ID is displayed.