V3 series unified storage may fail to copy a file in the same preset size as the directory where the storage resides. What are the causes and troubleshooting methods?


When the Windows program copies local files to a file system, the file block size of the CIFS client is 4 KB, whereas the default file system block size of the storage system is 64 KB. Any copied file smaller than 64 KB occupies 64 KB space in the file system, which is a waste of space. Therefore, you are advised to adjust the file system block size to ensure the full use of storage space.

Other related questions:
Whether SAN and NAS resources of unified storage V300R002 can reside in the same storage pool
SAN and NAS resources of unified storage V300R002 cannot reside in the same storage pool. SAN resources are independent of NAS resources. Storage pools are created specifically for either LUNs or file systems. That is, LUNs and file systems cannot coexist in one storage pool but can reside in the same disk domain. The capacity of a storage pool can be dynamically expanded.

What's the logical port of V3 series unified storage?
Logical ports, used for file services' running, are created based on physical Ethernet ports, bond ports, or VLANs. If the parent port of a logical port running file services is faulty, an IP failover will be triggered and the services will automatically fail over to another available port based on the failover policy. If the owning controller of the logical port's current parent port is different from the file system's owning controller, the system will need to transfer I/Os between controllers, decreasing system performance.

After V3 series unified storage mounts an NFS share in Linux, can new files be created in the mount directory?
When you mount an NFS share on a client, do not first run the cd command in the CLI to enter the mount directory and then mount the NFS to the directory. Because in the case, the system will recognize the directory as the local directory and the created file will reside on the local directory. You need to mount the NFS file system to the directory first and then enter the directory.

Quota tree function of V3 series unified storage
A quota tree is the root directory of a file system. Quota trees are special directories. The following distinguishes a quota tree from a common directory: 1. Quota trees can only be created, deleted, or renamed by administrators using the command-line interface (CLI) or graphical user interface (GUI). Only empty quota trees can be deleted. 2. Quota trees can be shared using protocols and cannot be renamed or deleted during sharing. 3. Administrators can manage quotas such as file quantity or capacity under the quota tree.

IP failover policy of V3 series unified storage
During the system initialization, the system automatically adds all Ethernet ports and bond ports of clusters to the default failover group. An IP address fails over first to the port at the same position in the peer controller, then to ports at other positions in the peer controller, and last to ports in the local controller. It can float between various interface modules. Which port it floats to is related with the port location, not the port rate. Later versions will allow you to customize failover groups.

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