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

Exam Code: HAT-420
Exam Name: Hitachi Data Systems Certified Professional - Modular storage installation
Updated: Nov 06, 2026
Q&As: 110 Questions and Answers

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Hitachi HAT-420 Exam Syllabus Topics:

Section	Objectives
Storage Configuration	- Logical configuration 1. Storage pool creation 2. Logical unit provisioning 3. RAID configuration
Management and Administration	- System management 1. Monitoring and maintenance 2. Firmware and licensing 3. Management utilities
Troubleshooting	- Problem diagnosis 1. System log analysis 2. Hardware fault identification 3. Connectivity troubleshooting
Hardware Installation	- Physical deployment 1. Expansion unit installation 2. Drive installation 3. Controller installation
Data Protection and Performance	- Availability and optimization 1. Storage best practices 2. Performance optimization 3. Redundancy and failover
Modular Storage Architecture	- Storage system components 1. Cache and memory concepts 2. Disk enclosures and connectivity 3. Controller architecture
Installation Planning	- Site preparation 1. Rack and cabling preparation 2. Power and environmental requirements 3. Hardware verification
Connectivity and Host Integration	- Front-end connectivity 1. iSCSI and Ethernet connectivity 2. Host mapping and zoning 3. Fibre Channel configuration

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

Question #1

Which performance feature is provided by the Hitachi Unified Storage systems controller architecture?

A. automatic front-end storage group load balancing
B. automatic controller load balancing
C. automatic cache segment resizing
D. automatic front-end port hardware load balancing

Reveal Solution Discussion 0

Correct Answer: B 🗳️

Question #2

A customer has installed a Hitachi Unified Storage (HUS) system with only port 0A connected to a Linux
server. There is a video streaming application running on the server. You have to perform a firmware
update using SNM2. What will happen when the update is started?

A. The firmware update will fail because the HUS active/active controller feature checks for alternate
pathing.
B. The Linux application will continue to function non-disruptively.
C. The firmware update process will abort if the HUS does not have at least 5 seconds of no I/O activity on
port 0A within 5 minutes.
D. The Linux server will time-out because there is no alternate path.

Reveal Solution Discussion 0

Correct Answer: B 🗳️

Question #3

Which two statements relating to Storage Navigator Modular 2 (SNM2) are correct? (Choose two.)

A. SNM2 issues SNMP alerts for failed components within the system.
B. SNM2 allows you to change the IP address and port number used to communicate with the system.
C. SNM2 can be used to define the Command Devices and the Differential Management LUNs needed by
replication software.
D. SNM2 uses out-of-band communication to administer the system and in-band communication to
manage replication.

Reveal Solution Discussion 0

Correct Answer: B,C 🗳️

Question #4

Which two self-service resources would you use if you require installation assistance? (Choose two.)