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Hitachi HAT-420 : 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: Aug 04, 2026

Q & A: 110 Questions and Answers

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Hitachi HAT-420 Exam Syllabus Topics:

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

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

1. Yesterday you allocated five new LUNs for a Solaris 9 host. Today the Solaris administrator is concerned
about corrupt data because the host system log has several entries referencing the new LUNs with the
following message: "Corrupt label; wrong magic number". What do you tell the Solaris administrator?

A) That they need to configure Device Mapper for the newly allocated LUNs.
B) That the message is normal for new LUN allocations and that they just need to label the new partitions.
C) That the Master Boot Record (MBR) on one of the disks has become corrupt and that rebooting the
host should fix the issue.
D) That they should shut down the server right away and that you will allocate five new LUNs.


2. Why will a server in an environment using persistent binding maintain a constant view of its target IDs
when rebooted?

A) Because persistent binding retains the target ID information.
B) Because the driver software remaps the SCSI target ID to the new WWNNs automatically.
C) Because persistent binding will connect to the LU Manager and provide the target IDs.
D) Because the LU Management Service will manage the target IDs.


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


4. What must be installed on an AIX server prior to Hitachi Dynamic Link Manager Installation?

A) MPXIO
B) HACMP
C) HTnM agent
D) Hitachi ODM


5. Which two operations can be performed using Storage Navigator Modular 2 on a Hitachi Unified Storage
system? (Choose two.)

A) Set persistent binding.
B) Run the Initial Setup Wizard.
C) Create Logical Units.
D) Display Disk Management properties.


Solutions:

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

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