Method used to extend LUN capacity of OceanStor T Series

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You can extend LUN capacity of OceanStor T Series as follows:
1. When the capacity of a LUN cannot meet service requirements, you can extend the LUN capacity by adding capacity from other LUNs.
2. After a LUN is extended, its capacity is the total capacity of the primary LUN and all secondary LUNs. LUN extending operation can be performed online without stopping services on the extending primary LUN.

After a LUNs is deleted, the capacity of a newly created LUN is smaller than the total capacity of original LUNs because space is not continuous. You are advised to configure LUN extending for LUN expansion.
3. Go to the Creating LUN Extending Wizard dialog box.
In the navigation tree, select Assistant.
In the function pane, choose Basic Settings > Extend LUN.
The Creating LUN Extending Wizard dialog box is displayed.

Select the primary LUN of the extended LUN.
In the Assistant dialog box, click Next.
The Creating LUN Extending Wizard Step 3-1: Select Extending Primary LUN dialog box is displayed.

Select an ordinary LUN as the primary LUN of the extended LUN.
Select the secondary LUN of the extended LUN.
In the Creating LUN Extending Wizard Step 3-1: Select Extending Primary LUN dialog box, click Next.
The Creating LUN Extending Wizard Step 3-2: Select Extending Secondary LUN dialog box is displayed.

Select one LUN or multiple LUNs as the secondary LUN of the extended LUN.
Click Next.
The Creating LUN Extending Wizard Step 3-3: Summary dialog box is displayed, displaying the primary and secondary LUNs after expansion.

Click Finish to complete LUN expansion.
The Information dialog box is displayed.
Click OK.

4. For details about operating systems after LUN capacity expansion, go to .

Other related questions:
Method used to expand LUN capacity of OceanStor T Series
You can expand LUN capacity of OceanStor T Series as follows: Go to the Expand dialog box. In the ISM navigation tree, choose All Devices > SN_XX > Storage Resources > Block Storage Pools. (SN_XX indicates the target storage storage.) In the right function pane, select the RAID group you want to expand. Click Expand. The Expand dialog box is displayed. Expand a RAID group. In the Available Disks area, select the idle disks that you want to add to the RAID group. Note: To improve disk utilization, you are advised to select an idle disk of which the capacity is the same as that of a member disk in the RAID group. Click the idle disk and add the disk to the Selected Disks group box. Confirm the RAID group expansion. Click OK. The Warning dialog box is displayed. Read and confirm the information in the dialog box. Then select I have read the warning message carefully. Click OK. The Information dialog box is displayed, indicating that the operation is successful. Click OK to return to the Block Storage Pools page and complete RAID group expansion. Result After the RAID group is expanded, you can perform the following operations to check the total capacity of the RAID group after capacity expansion. On the Block Storage Pools page, select the RAID group after capacity expansion. Click the Details tab to view the total capacity of the RAID group after capacity expansion.

Method used to expand host file system capacity of OceanStor T Series
You can expand host file systems of OceanStor T Series as follows: 1. Expand the capacity by using the volume management software delivered with the host (LVM and dynamic disk). 2. Expand the capacity by using the third-party volume management software (VxVM).

Method used to map LUNs in OceanStor T Series unified storage
You can map LUNs in OceanStor T Series unified storage as follows: 1. The storage system provides two mapping modes: array port mapping type and initiator mapping type. Select a proper mapping mode based on the service requirements and networking. For more details, go to the Setting a Mapping Mode page. 2. If the connection is an iSCSI connection, the mapping can be added through the initiator. For more details, go to the Initiator Mapping Mode (for Fibre Channel Connections and iSCSI connections) page. 3. If the connection is a Fibre Channel connection, the mapping can be added through the initiator or array port. For more details, go to the Initiator Mapping Mode (for Fibre Channel Connections and iSCSI connections) page or the Array port Mapping Mode (for Fibre Channle Connections) page.

Method used to configure LUN capacity expansion
You can configure LUN capacity expansion as follows: When storage space provided to the host by the LUN cannot meet service requirements, you need to perform capacity expansion to expand the LUN's capacity. To configure LUN expansion for a mapped LUN, configure LUN expansion on the storage system and application server. Then the expanded LUN can be used. Storage device side: creating LUN expansion on Integrated Storage Manager (ISM) Application server side: performing capacity expansion for the disk mapped to the LUN in CLI mode Note: To create LUN expansion on ISM in the storage systems of the S5000 V100R001 version, ensure that the primary and secondary LUNs are located in the same RAID group. In this case, you can avoid read and write operations across the RAID groups, and deteriorating data read and write performance.

Method used to detect new LUNs on the host of OceanStor T/V3 storage systems
If Huawei UltraPath is installed on the host, run the hot_add command to scan for disks. The existing services will not be affected. If the multipathing software is not installed, use the iSCSI network and restart the iSCSI service. If the Fibre Channel network is used, restart the server.

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