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Exam Code: HAT-420
Exam Name: Hitachi Data Systems Certified Professional - Modular storage installation
Updated: Jul 12, 2026
Q & A: 110 Questions and Answers
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1. Which statement regarding the Hitachi Unified Storage systems Web tool is correct?
A) Web access is a part of the system firmware.
B) Web access must be enabled separately in SNM2 for each storage system after activating the license
key.
C) The Web tool requires a dedicated license key to enable access.
D) The Web tool is installed and enabled automatically when installing SNM2.
2. Which three operations are allowed after enabling security on a Hitachi Unified Storage system Fibre
Channel (FC) port? (Choose three.)
A) Add multiple WWNs to one Host Group.
B) Create a Host Group with two different host connection modes.
C) Add the same WWN to multiple Host Groups on the same FC port.
D) Create Host Groups with different host connection modes on the same FC port.
E) Add a LU to two different Host Groups behind two different ports.
3. Which two statements relating to LU configuration and management on the Hitachi Unified Storage
systems are correct? (Choose two.)
A) A LU can be physically extended if there is space left in the RAID group.
B) It is possible to format a LU quicker by attaching it to both controllers.
C) A RAID group cannot be deleted before all its LUs have been deleted.
D) It is possible to delete all RAID groups including all LUs on the system with one command.
4. What needs to be replaced in case of a local memory DIMM failure on a Hitachi Unified Storage
controller?
A) the local memory DIMM
B) the controller and the local memory DIMM
C) the controller
D) the controller, the local memory DIMM and the cache DIMMs
5. 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) queue length
C) command length
D) command depth
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: A,D,E | Question # 3 Answer: A,D | Question # 4 Answer: B | Question # 5 Answer: A |
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