How to rollback license of V3 storage

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Other related questions:
Checking license functions in an OceanStor V3 storage system
You can check the license functions in the Commercial License Application Template. This document describes the functions and control items of licenses. For example, the license control items of the virtual snapshot function are HyperImage Function and Max. HyperImage Number.

Is a license required for the 3DC feature of V3 storage products?
3DC uses the remote replication feature. When 3DC is configured, each device needs to contain the remote replication license.

VCS license status of an OceanStor V3 storage system
On the CLI, run the vxlicrep command to check the license status. If the value of the License Type parameter is PERMANENT in the command output, the license has been imported and activated successfully. Otherwise, the license was not imported. If the license is not imported, run the following command to synchronize the license: hasys -updatelic -all haclus -updatlic

Which V3 versions can use NAS?
V300R001 supports only SAN. Both SAN and NAS are supported by V300R002 and later versions. The following model is special. 1) NAS is not supported by OceanStor 2800 V3; 2) NAS is not supported by OceanStor 2600 V3 Video Surveillance Edition; 3) NAS is only supported by OceanStor 2200 V3 with conditions: V3 version >= V300R006 and Memory Cache >= 16GB.

Failed to roll back the software version of an AP
Fit AP version rollback: AP# upgrade version ftp Fitxx.bin 192.168.0.100 admin admin # Upgrade the system version using FTP. AP# reboot # Restart the AP. Perform the version rollback in the following sequence: V200R006/V200R005 --> V200R003 --> V2R002/V200R001 The minimum version supported by Fat APs is V200R003. For details about AP version rollback, see the appropriate upgrade guide. No special configuration is required.

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