In an effort to reduce storage space on your server, you would like to eliminate duplicate copies of data in your server's ZFS file systems. How do you specify that pool1/data should not contain…

Question

Options

• Azfs create - o compression=on pool1/data
• Bzpool create -o deduplication =on pool1; zfs create pool1/data
• Czfs create - o deduplication=on pool1; zfs create pool1/data
• Dzfs create - o dedupratio=2 pool1/data
• Ezfs create - o dedup=on pool1/data

• A
  3% (1)
• C
  6% (2)
• D
  3% (1)
• E
  87% (27)

Explanation

Option E is correct because the ZFS property to enable deduplication is simply dedup=on, applied to a dataset using zfs create -o dedup=on pool1/data - this tells ZFS to hash each block on write and skip storing it if an identical block already exists.

Why the distractors fail:

• A uses compression=on, which shrinks data size but does not eliminate duplicate blocks - compression and deduplication are distinct features.
• B uses zpool create with the wrong property name (deduplication instead of dedup); dedup is a dataset property, not a pool-level property set this way.
• C has the same wrong property name (deduplication) and mistakenly targets the pool root (pool1) rather than the intended dataset pool1/data.
• D uses dedupratio, which is a read-only reporting property showing the ratio achieved - it cannot be set to enable deduplication.

Memory tip: Think of the ZFS command as a contract - zfs manages datasets, zpool manages pools, and the deduplication property is the shortened dedup, not the full word. If you see deduplication spelled out or zpool being used to set it, it's wrong.

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