Xsan employs a metadata controller architecture that separates metadata operations from file data. The MDC maintains critical information about the file system—including which specific disk sectors store each file, file permissions, and access status—while client computers communicate directly with storage devices for actual data transfers.
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ACLs on Xsan volumes are recognized by both Xsan clients and Windows StorNext clients, but UNIX clients ignore them entirely. For mixed environments with Windows and Xsan clients, careful planning is required to ensure consistent access controls across platforms. xsan filesystem access
4K/8K video workflows and high-concurrency databases. 2. Distributed LAN Client (DLC) Access
Extremely low latency and dedicated bandwidth that doesn't compete with office internet or email traffic. 2. DLC (Distributed LAN Clients) This link or copies made by others cannot be deleted
When troubleshooting client access, system administrators should examine the core filesystem log files located on both the client and the MDC:
xsanctl status Media_SAN
When a DLC client requests data, the DLC server fetches the blocks via Fibre Channel and translates them over IP to the client.
Use cvfsck (Xsan is based on StorNext/CVFS) to check and repair volume metadata. Conclusion Try again later
This is the highest-performance tier. The Mac client has a dedicated Fibre Channel HBA installed. It communicates with the MDC via Ethernet for file permissions but reads and writes blocks directly to the shared storage over Fibre Channel. This setup delivers ultra-low latency and maximum throughput, making it ideal for 4K/8K uncompressed video editing. Distributed LAN Client (DLC)