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

HAT-420

Exam Code: HAT-420

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

Updated: Jul 29, 2026

Q & A: 110 Questions and Answers

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Hitachi HAT-420 Exam Syllabus Topics:
SectionObjectives
Topic 1: Storage Networking- SAN connectivity
  • 1. Zoning and masking
    • 2. Fibre Channel concepts
      - Host integration
      • 1. Host attachment procedures
        • 2. Multipathing configuration
          Topic 2: Maintenance and Troubleshooting- Problem resolution
          • 1. Common installation issues
            • 2. Hardware replacement procedures
              - Monitoring and diagnostics
              • 1. Performance monitoring tools
                • 2. Event and log analysis
                  Topic 3: Installation and Configuration- System configuration
                  • 1. Storage pool configuration
                    • 2. LUN provisioning
                      - Initial system setup
                      • 1. Pre-installation requirements
                        • 2. Physical installation procedures
                          Topic 4: Hitachi Modular Storage Architecture- Storage system components overview
                          • 1. Controller and cache architecture
                            • 2. Disk and RAID configurations
                              - System models and hardware overview
                              • 1. Hardware connectivity options
                                • 2. Modular storage product families
                                  Hitachi Data Systems Certified Professional - Modular storage installation Sample Questions:

                                  1. You have to replace a Cache Backup Battery online on a Hitachi Unified Storage system. Which two
                                  statements are correct? (Choose two.)

                                  A) You should only perform the replacement while the green READY LED on the front of the Controller
                                  Box is blinking at high speed.
                                  B) When the power is turned off during the replacement, user data on the cache that has not been written
                                  will be backed up to flash memory.
                                  C) You must complete the replacement within a certain time frame.
                                  D) You should not perform any replacement while the green READY LED on the front of the Controller
                                  Box is blinking at high speed.


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

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


                                  3. Which two apply when replacing a disk on a Hitachi Unified Storage (HUS) system? (Choose two.)

                                  A) The HUS needs to be in maintenance mode when disks are replaced.
                                  B) The Web tool should be used to confirm that the replacement is successful.
                                  C) The faulty drive must be blocked using SNM2 before replacement.
                                  D) A wrist strap must be used when replacing disk drives.


                                  4. A Hitachi Unified Storage (HUS) system has been configured to use additional Host Groups. Which host
                                  interface type on the HUS can be used to access these Host Groups?

                                  A) IP
                                  B) NAS
                                  C) iSCSI
                                  D) FC


                                  5. A user with Storage Administration View and Management rights has logged in to a Hitachi Unified
                                  Storage system. What happens if a second user with Storage Administration View and Management
                                  rights tries to log in to the same system?

                                  A) The log in is allowed but the first user will keep the storage administration rights. The second user will
                                  be view-only.
                                  B) The log in of the second user will be refused because he has storage administration rights as well.
                                  C) The log in is allowed and both users will have storage administration rights.
                                  D) The log in is allowed and the second user will get the storage administration rights. The original user's
                                  rights are reduced to view-only.


                                  Solutions:

                                  Question # 1
                                  Answer: C,D
                                  Question # 2
                                  Answer: D
                                  Question # 3
                                  Answer: B,D
                                  Question # 4
                                  Answer: D
                                  Question # 5
                                  Answer: A

                                  HAT-420 Related Exams
                                  HH0-290 - Hitachi Data Systems Implementation-Services
                                  HH0-330 - HDS Storage Manager-Business Continuity Enterprise
                                  HH0-120 - Hitachi Data Systems Storage Foundations - Modular Exam
                                  HH0-015 - TagmaStore NSC-Installation and Configuration
                                  HH0-340 - Hitachi Data Systems Storage Manager-Storage Management
                                  Related Certifications
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                                  Hitachi Installation and Support
                                  Hitachi Vantara Qualified Associate
                                  Hitachi Vantara Qualified Professional
                                  Administration Professional
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