Whether OceanStor T Series RAID groups can be expanded

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1. On OceanStor T Series V100R005 storage systems, you can add disks to the original RAID group online.
2. The traditional capacity expansion is implemented by creating more RAID groups. In this case, the complexity of managing storage resources increases when capacity expansion becomes frequent.
The dynamic RAID group expansion is to add new disks to the target RAID group, and instruct the storage device to incorporate the capacity of those disks arranged in a unified stripe depth with the LUNs in the RAID group. This method can increase the storage capacity without changing the number and configuration of RAID groups.

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.

Whether OceanStor 9000 requires RAID groups and LUNs
RAID groups and LUNs are not required by OceanStor 9000 because it is a distributed file system for big data based on all x86 servers. The entire cluster is a big file system (root directory) where subdirectories and shares can be directly created to use storage space.

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).

Procedure for expanding the disk enclosure of OceanStor T Series online
OceanStor T Series storage products support online capacity expansion of disk enclosures. For details, see .

Whether hot spare disks can be specified for specific RAID groups on T series unified storage systems
On OceanStor T Series V100R005 storage systems, hot spare disks cannot be specified for a specific RAID group.

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