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Exam E20-585 All Questions

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Exam E20-585 topic 1 question 65 discussion

Actual exam question from Dell's E20-585
Question #: 65
Topic #: 1
[All E20-585 Questions]

When implementing NFS with a Dell EMC Data Domain system, why should hard mounts be used?

  • A. Enable backups of individual mounts
  • B. Ensure server availability after reboots or outages
  • C. Prevent non-administrators from accessing the mounts
  • D. Ensure availability of mounts through other protocol
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Suggested Answer: B 🗳️
If you have mounted the NFS filesystem using hard mount, it will repeatedly retry to contact the server. Once the server is back online, the program will continue to execute undisturbed from the state where it was during server crash. We can use the mount option "intr" which allows NFS requests to be interrupted if the server goes down or cannot be reached. Hence the recommended settings are hard and intr options.

Note: Soft Mount -
Suppose you have mounted a NFS filesystem using "soft mount". When a program or application requests a file from the NFS filesystem, NFS client daemons will try to retrieve the data from the NFS server. But, if it doesn't get any response from the NFS server (due to any crash or failure of NFS server), the NFS client will report an error to the process on the client machine requesting the file access. The advantage of this mechanism is "fast responsiveness" as it doesn't wait for the
NFS server to respond. But the main disadvantage of this method is data corruption or loss of data. So this is not a recommended option to use.
References:
https://linoxide.com/nfs/difference-soft-hard-nfs-mount/

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