On a Hitachi Unified Storage system, which statement regarding Master Cache Partitions is correct?

Question

Options

• AThey do not exist until the Cache Partition ManagerLicensekey is installed.
• BThere is always a Master Cache Partition 0 in controller 0 and in controller 1.
• CThey always exist if there is 2GB or more of cache memory installed per controller.
• DThey always exist whether or not the Cache Partition ManagerLicensekey is installed.

• B
  3% (1)
• C
  6% (2)
• D
  91% (30)

Explanation

Master Cache Partitions are a fundamental, built-in component of Hitachi Unified Storage systems that exist regardless of licensing - the Cache Partition Manager license key only unlocks the ability to create additional user-defined cache partitions, not the master ones, making D correct. Option A is wrong because Master Cache Partitions are always present even without the license key; the license simply enables partition management features beyond the default. Option B is partially misleading - while Master Cache Partitions do exist on each controller, stating they are specifically "Partition 0" in a numbered scheme conflates user-defined partition numbering with the master partition concept, and the phrasing implies they only exist in that specific numbered form. Option C is wrong because Master Cache Partitions are not contingent on a cache memory threshold; they exist regardless of how much cache is installed.

Memory tip: Think of the Master Cache Partition like the factory default partition - it's always there "out of the box," just like a hard drive always has a default partition scheme before you buy extra partitioning software.

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