Hitachi Data Systems Certified Professional - Modular storage installation : HAT-420

Exam Code: HAT-420

Exam Name: Hitachi Data Systems Certified Professional - Modular storage installation

Updated: Sep 03, 2026

Q & A: 110 Questions and Answers

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Hitachi HAT-420 Exam Syllabus Topics:

Section	Objectives
Topic 1: Maintenance and Troubleshooting	- Problem resolution 1. Hardware replacement procedures 2. Common installation issues - Monitoring and diagnostics 1. Event and log analysis 2. Performance monitoring tools
Topic 2: Hitachi Modular Storage Architecture	- System models and hardware overview 1. Hardware connectivity options 2. Modular storage product families - Storage system components overview 1. Controller and cache architecture 2. Disk and RAID configurations
Topic 3: Storage Networking	- Host integration 1. Host attachment procedures 2. Multipathing configuration - SAN connectivity 1. Zoning and masking 2. Fibre Channel concepts
Topic 4: Installation and Configuration	- System configuration 1. LUN provisioning 2. Storage pool configuration - Initial system setup 1. Physical installation procedures 2. Pre-installation requirements

Hitachi Data Systems Certified Professional - Modular storage installation Sample Questions:

Question #1

A customer uses TrueCopy and ShadowImage with Hitachi AMS2000 modular arrays. They are
interested in upgrading those systems to Hitachi Unified Storage (HUS). Which two benefits will the
customer have with HUS systems in this environment? (Choose two.)

A. TrueCopy and ShadowImage will no longer require a DM-LU.
B. TrueCopy and ShadowImage will require less cache in the systems.
C. The size of the DM-LU used for ShadowImage and TrueCopy will be reduced by about 50%.
D. The granularity of differential data being copied to the replication target has improved.

Answer: B,D

Question #2

Which two statements relating to LU configuration and management on the Hitachi Unified Storage
systems are correct? (Choose two.)

A. A LU can be physically extended if there is space left in the RAID group.
B. A RAID group cannot be deleted before all its LUs have been deleted.
C. It is possible to format a LU quicker by attaching it to both controllers.
D. It is possible to delete all RAID groups including all LUs on the system with one command.

Answer: A,D

Question #3

Which two tasks can be performed online on a Hitachi Unified Storage system? (Choose two.)

A. replacing a SFP FC Host Connector
B. replacing a Controller Unit
C. removing a Drive Box
D. upgrading a Flash Memory

Answer: A,B

Question #4

Which two alerts does Hitachi Dynamic Provisioning issue when DP-Pool capacity usage thresholds are
exceeded on a Hitachi Unified Storage system? (Choose two.)

A. Early Alert
B. Depletion Alert
C. Over Provisioning Alert
D. Exceeding Alert

Answer: A,B

Question #5

What are three characteristics of the Hitachi Unified Storage systems active/active controller design?
(Choose three.)

A. When creating a LUN the default controller must be selected.
B. Non disruptive firmware upgrade is possible even if a host is connected by only one path.
C. The processor of Ctlr0 can access the Fibre Channel (FC) ports of Ctrl1.
D. Workload is automatically balanced between controllers.
E. SNM2 GUI is used to turn on active/active controller processing.

Answer: B,C,D

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