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The main reason to implement a Redundant Array of Inexpensive Disks (RAID) level 1 on a network file server is:
Attain performance improvement.
Provide user authentication.
Assure the confidentiality of data.
Improve availability of data.
RAID level 1 provides disk mirroring. Data written to one disk are also written to another disk. Users in the network access data in the first disk; if disk one fails, the second disk takes over. This redundancy ensures the availability of data. RAID level 1 does not substantially improve performance except under certain conditions where data reads may be parallelized, has no relevance to authentication, and does nothing to provide for data confidentiality.
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