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EMC D-UN-DY-23認定を取得することは、Dell Unityストレージシステムの展開と管理におけるあなたの専門知識を証明するものです。この認定は、Dell Unityストレージシステムを使用するIT組織にとって非常に価値があり、ストレージ管理者またはITプロフェッショナルとしてのキャリアアップに役立ちます。
EMC D-UN-DY-23試験は、ストレージアーキテクト、システム管理者、技術サポートエンジニアなど、Dell EMC Unityシステムでの作業経験を持つITプロフェッショナルを対象としています。候補者は、ストレージネットワーク、ストレージプロトコル、および仮想化技術について強い理解を持っていることが期待されています。
EMC D-UN-DY-23試験を受験するためには、ストレージシステム、ネットワーキング、およびサーバーテクノロジーについて良好な理解が必要です。また、Dell EMC Unityストレージシステムに経験があり、これらのシステムを管理するために使用されるコマンドラインインターフェイス（CLI）およびグラフィカルユーザーインターフェイス（GUI）に精通している必要があります。
質問 # 227
A file system is 1 TB in size and contains 250 GB of data. The file system is not fully allocated and only 450 GB of pool storage is in use. The user wants to reduce the file system to 300 GB.
How much space is returned to the storage pool?
- A. 150 GB
- B. 700 GB
- C. 450 GB
- D. 750 GB
正解：A
質問 # 228
On a Dell Unity XT file system asynchronous replication session, how many system Snapshots are required to support replication?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
解説：
Explanation
On a Dell Unity XT file system asynchronous replication session, four system Snapshots are required to support replication. Two system Snapshots are created on the source file system, and two system Snapshots are created on the destination file system. The source system Snapshots are used to track the changes that need to be replicated, and the destination system Snapshots are used to apply the changes and maintain a consistent point-in-time copy of the source data. The system Snapshots are automatically created and managed by the replication engine and are not visible to the user.
References: [Dell EMC Unity: Replication Technologies], [Dell EMC Unity: File System Configuration]
質問 # 229
In Unisphere, a storage administrator has inadvertently disabled Data Reduction on an existing LUN.
What would result from this action?
- A. Existing data is left in its current state. New data is neither deduplicated nor compressed.
- B. A background LUN migration occurs, moving the data to a new LUN where it is inflated. New data is neither deduplicated nor compressed.
- C. Data Reduction, once enabled, cannot be disabled. New data is deduplicated or compressed.
- D. Existing data is dynamically inflated to its full size, undoing the impact of deduplication and compression. New data is neither deduplicated nor compressed.
正解：A
質問 # 230
Which Unity storage resource is configured when running the Initial Configuration wizard?
- A. Storage Pool
- B. File System
- C. LUN
- D. Consistency Group
正解：A
質問 # 231
What describes multiple LUN snapshots?
- A. Captures multiple point-in-time data states.
Snapshot data state is marked "modified" from its source when attached.
Snapshot tree supports multiple simultaneous attaches. - B. Captures multiple point-in-time data states.
Snapshot data state is marked "modified" from its source when attached.
Snapshot tree supports only one attach at a time. - C. Captures multiple point-in-time data states.
Snapshot data state is marked "unmodified'' from its source when attached.
Snapshot tree supports multiple simultaneous attaches. - D. Captures multiple point-in-time data states.
Snapshot data state is marked "unmodified'' from its source when attached.
Snapshot tree supports only one attach at a time.
正解：B
質問 # 232
What is the significance of a file system's Minimum Allocation Size?
- A. Ensures the file system always has free space
- B. Provides a mechanism for free space reporting
- C. Prevents the removal of too much file system space
- D. Reserves a configurable space for Snapshots
正解：B
質問 # 233
What is the minimum VMware Hypervisor version a server must be running in order to support the deployment of a UnityVSA system?
- A. 6.0
- B. 5.5
- C. 5.0
- D. 4.0
正解：A
質問 # 234
Which two firewall ports must be opened when configuring Integrated SRS access to a Dell Unity XT array? (Select 2)
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
正解：A、C
質問 # 235
What is maximum amount of time allowed when saving a configuration from the Collect Service Information menu from Unsphere in order to avoid a time-out?
- A. 45 minutes
- B. 120 minutes
- C. 60 minutes
- D. 90 minutes
正解：C
質問 # 236
How does a Dell EMC Unity XT array with dynamic pools rebuild failed drives?
- A. Uses vault drive space until the failed drive is replaced
- B. Invokes the hot spare associated with the pool
- C. Invokes the array global spare
- D. Uses spare space reserved within the pool
正解：D
質問 # 237
A storage administrator using Unisphere has inadvertently disabled Data Reduction on an existing LUN.
What results from this action?
- A. Existing data is left in its current state.
New data is neither deduplicated nor compressed. - B. Data Reduction, once enabled, cannot be disabled.
New data is deduplicated or compressed. - C. A background LUN migration occurs, moving the data to a new LUN where it is inflated.
New data is neither deduplicated nor compressed. - D. Existing data is dynamically inflated to its full size, undoing the impact of deduplication and compression.
New data is neither deduplicated nor compressed.
正解：C
質問 # 238
What are characteristics of the file system Snapshot Copy operation?
- A. Parent can only be a read-only snapshot Copy will be a read-only snapshot Has an independent Retention Policy from the parent
- B. Parent can only be a read-only snapshot Copy will be a read/write snapshot Inherits the parent Retention Policy
- C. Parent can be a read-only or read/write snapshot Copy will be a read-only snapshot Has an independent Retention Policy from the parent
- D. Parent can be a read-only or read/write snapshot Copy will be a read/write snapshot Inherits the parent Retention Policy
正解：B
質問 # 239
What is the significance of the best practices recommendation to maintain 10% free capacity on a storage pool?
- A. Provides enough space for drive failures
- B. Allows enough capacity for Snapshots
- C. Reduces cache flush times
- D. Improves FAST Cache warmup times
正解：B
質問 # 240
What is a benefit of using vVols?
- A. They enable the automatic import of capability profiles from vSphere to Unisphere.
- B. All VMs on a datastore are snapped simultaneously.
- C. They enable the assignment of isolated file storage partitions.
- D. Individual VMs on a datastore can be snapped.
正解：D
解説：
Explanation
A benefit of using vVols is that individual VMs on a datastore can be snapped. vVols are virtual volumes that are stored on a storage array and managed by vSphere. They enable granular control and management of VM storage. With vVols, each VM has its own set of virtual disks that are mapped to corresponding storage objects on the array. This allows the array to perform snapshot operations on individual VMs without affecting other VMs on the same datastore.
References: [Dell EMC Unity: VMware vSphere Virtual Volumes (vVols) Implementation]
質問 # 241
Which FAST Cache operation can be performed from the Settings window?
- A. Pause FAST Cache use
- B. Expand FAST Cache
- C. Disable FAST Cache use on a specific pool
- D. Enable FAST Cache use on a specific pool
正解：B
質問 # 242
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