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

Hitachi HAT-420 Actual PDF
  • Exam Code: HAT-420
  • Exam Name: Hitachi Data Systems Certified Professional - Modular storage installation
  • Updated: Jun 03, 2026
  • Q & A: 110 Questions and Answers
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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 the message is normal for new LUN allocations and that they just need to label the new partitions.
B) That they need to configure Device Mapper for the newly allocated LUNs.
C) That they should shut down the server right away and that you will allocate five new LUNs.
D) That the Master Boot Record (MBR) on one of the disks has become corrupt and that rebooting the
host should fix the issue.


2. A storage administrator would like to connect 10 hosts into the same FC ports of a Hitachi Unified Storage
system. They are concerned that one host with high I/Os will impact the other hosts on the same FC ports.
Which HBA parameter should be set to limit the number of outstanding I/Os on each host?

A) queue depth
B) command depth
C) queue length
D) command length


3. An administrator wants to install Hitachi Dynamic Link Manager (HDLM) on a Solaris server. Which two
are required before performing the installation? (Choose two.)

A) The server must have IPv6 disabled.
B) The processes of all applications accessing the devices to be managed by HDLM must be terminated.
C) A valid HDLM license must be obtained.
D) The server must be in a dual path configuration.


4. What is Hitachi Data System's recommended practice for zoning?

A) single operation system zoning (all HBAs from one OS in a zone)
B) port-based zoning
C) single HBA zoning (one HBA per zone)
D) zoning is optional


5. You have been asked to allocate storage from a Hitachi Unified Storage system to a cluster of AIX hosts.
The application owner wants you to make sure that the queue depth is set to 16 for all the LUNs. Where
do you define the queue depth?

A) on the WWNN Target Ports
B) on each LUN
C) on the WWPN Target Ports
D) on the server HBAs


Solutions:

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

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