Which client-side check helps in troubleshooting stale NFS file handle issues by verifying connectivity to the storage system?

Which client-side check helps in troubleshooting stale NFS file handle issues by verifying connectivity to the storage system?

• A. Check the client's /etc/fstab
• B. Check connectivity to the storage system from the client
• C. Check the exportfs output on the storage system
• D. Run a network trace between client and storage

Answer: (B)

Ensuring the client can reach the storage system is the first step in diagnosing stale NFS file handles. If the client cannot connect to the NFS server, it cannot contact it to validate or refresh file handles, which can lead to or mimic stale-handle symptoms. A quick client-side connectivity check to the storage system confirms the network path is usable and that essential ports (such as those NFS uses) are reachable. If this test passes, you’ve ruled out basic network problems and can proceed with deeper checks (like server exports or mount state). Other options don’t address connectivity from the client to the server directly. Verifying the local mount configuration shows what is intended to be mounted but not whether the storage system is reachable. Checking the server’s export list reveals what is exported, not whether the client can reach it. A network trace can diagnose path issues but is more involved and not the immediate, simplest client-side check for this scenario.

Ensuring the client can reach the storage system is the first step in diagnosing stale NFS file handles. If the client cannot connect to the NFS server, it cannot contact it to validate or refresh file handles, which can lead to or mimic stale-handle symptoms. A quick client-side connectivity check to the storage system confirms the network path is usable and that essential ports (such as those NFS uses) are reachable. If this test passes, you’ve ruled out basic network problems and can proceed with deeper checks (like server exports or mount state).

Other options don’t address connectivity from the client to the server directly. Verifying the local mount configuration shows what is intended to be mounted but not whether the storage system is reachable. Checking the server’s export list reveals what is exported, not whether the client can reach it. A network trace can diagnose path issues but is more involved and not the immediate, simplest client-side check for this scenario.