Method used to configure LUN capacity expansion

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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.

Other related questions:
Method used to extend LUN capacity of OceanStor T Series
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 .

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.

Guidance on expanding the file system following the LUN capacity expansion of the Windows host
Guidance on expanding the file system following the LUN capacity expansion of the Windows host: 1. After LUN space is added on the storage side, scan for LUNs on the host. Right-click My Computer, choose Storage > Disk management, right-click Disk management, and choose Rescan Disk. You can see that the capacity of the disk has been expanded. Record drive letters of the disk. 2. Run diskpart to use a tool to expand the file system. Run list volume to obtain the volume corresponding to the disk, and run select volume name to choose the volume. 3. After the expansion, check whether the file system has been expanded.

Adding a disk to a RAID array
You can add a disk to a RAID array as follows: 1. If the LSISAS2208 or LSISAS3108 RAID controller card is used, you can add a new disk to a RAID array online. For details about how to expand the virtual disk (VD) capacity online, see HUAWEI Server RAID Controller Card User Guide 09. 2. If the LSISAS2308 or LSISAS3008 RAID controller card is used, you cannot add a disk to a RAID array through online capacity expansion and cannot expand the VD capacity online. 3. If softRAID is used, you cannot add a disk to a RAID array online or expand the VD capacity online.

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