Exam Code: HAT-420
Exam Name: Hitachi Data Systems Certified Professional - Modular storage installation
Certification Provider: Hitachi
Corresponding Certification: Hitachi Data Systems Certification

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Updated: Sep 05, 2026

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Hitachi HAT-420 Exam Overview:

Certification Vendor:	Hitachi Vantara
Exam Name:	Hitachi Data Systems Certified Professional - Modular Storage Installation (HAT-420)
Exam Number:	HAT-420
Exam Format:	Multiple choice
Available Languages:	English
Recommended Training:	Hitachi Vantara Learning Services
Exam Registration:	Hitachi Vantara Training & Certification
Sample Questions:	Hitachi HAT-420 Sample Questions
Exam Way:	Not officially specified (varies by testing center; typically proctored exam delivery)
Official Syllabus URL:	https://www.hitachivantara.com/services/training-certification.html

Hitachi HAT-420 Exam Syllabus Topics:

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

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

Question 1

You have set Extended Round Robin on a server with intensive sequential I/O profile. Which two benefits
result from implementing this algorithm? (Choose two.)

A. blocks held permanent in Read Cache
B. no tracks preloading on the system
C. efficient cache usage on the storage system
D. tracks preloaded to cache

Question 2

What are the two bitmap locations used by the Memory Management Layer during LU format in Hitachi
Unified Storage systems? (Choose two.)

A. in the RAID group upon creation
B. swapped in and out of cache as needed
C. in Cache Memory Adapter Master Partition 0
D. SSD on the Cache Memory Adapter

Question 3

What is the correct procedure to replace a suspected SAS interface cable connected to the last drive box
(DBL) of a Hitachi Unified Storage system?

A. Slide out the I/O module from the DBL, replace the cable and slide the I/O module back in.
B. Using the WEB tool, disable the suspected SAS link, replace the cable and enable the SAS link.
C. Replace the suspected SAS interface cable by a new one.
D. Using SNM2, disable the suspected SAS link, replace the cable and enable the SAS link.

Question 4

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

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

Question 5

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

A. Hitachi Data Systems InfoSearch database
B. Hitachi Data Systems product documentation
C. Hitachi Data Systems Installation Service Manager
D. Hitachi Data Systems Support Portal

Solutions:

Question 1
Answer: C,D

Question 2
Answer: A,B

Question 3
Answer: A

Question 4
Answer: A,D

Question 5
Answer: B,D

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