EMC E20-554 Exam Questions : Isilon Design Specialist Exam for Technology Architects

Exam Code: E20-554
Exam Name: Isilon Design Specialist Exam for Technology Architects
Updated: Sep 19, 2026
Q&As: 81 Questions and Answers

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EMC E20-554 Exam Syllabus Topics:

Section	Objectives
Networking and Protocols	- Network architecture for Isilon clusters - NFS, SMB, and HDFS protocol support
Solution Design Considerations	- Customer requirements analysis and sizing - Cluster design and scalability planning
Implementation and Troubleshooting	- Deployment planning and best practices - Common issues and troubleshooting methods
Performance and Scalability	- Performance optimization techniques - Cluster scaling and workload distribution
Data Protection and Availability	- Erasure coding and data protection schemes - Snapshots, replication, and backup integration
Isilon / OneFS Architecture Fundamentals	- Scale-out NAS architecture concepts - OneFS operating system fundamentals

EMC Isilon Design Specialist Exam for Technology Architects Sample Questions:

Question #1

-- Exhibit -
We have been engaged by a research hospital to help upgrade their Isilon installation. They currently have 12 previous generation Isilon nodes with 200TB of capacity and run on a 1Gbps network. They currently have 6 Illumina Hi-Seq Sequencers and an HPC cluster to process data. They would like to expand Isilon to 2PB of active data and 1PB of archive data. They use a third party data and metadata management service (IRODs) to stage data for analysis. The Isilon cluster is mainly used for analysis work with the HPC cluster.
-- Exhibit -
The customer has a limited budget. What would be the best price/performance solution for their active data?

A. 12 X-Series nodes with no SSD drives and 24GB of RAM
B. 14 X-Series nodes with no SSD drives and 96GB of RAM
C. 17 X-Series nodes with SSD drives and 48GB of RAM.
D. 14 NL-Series nodes with 24GB of RAM

Reveal Solution Discussion 0

Correct Answer: B 🗳️

Question #2

A hospital is considering using Isilon to store their long-term archive data for their PACS application. They currently have two million 17 MB studies. They expect capacity requirements to be 50% compounded growth per year. They plan to use N+2:1 protection, and would like this sized for three years of growth.Which minimum cluster configuration would meet this customer's environment?

A. Five X200 (3 TB drive) nodes
B. Four NL400 (2 TB drive) nodes
C. Five NL400 (1 TB drive) nodes
D. Three X400 (3 TB drive) nodes

Reveal Solution Discussion 0

Correct Answer: C 🗳️

Question #3

-- Exhibit -
A large manufacturing company is an existing Isilon customer with a cluster consisting of four NL400 nodes with 4TB drives. The cluster is using N+2:1 protection level and the file system shows that it is 60% utilized. Home directories and file shares comprise 75% of the existing content and the remainder is inactive deep archive. The company has 1,000 employees using Windows and Mac clients participating in a single Active Directory (AD) forest.
During a meeting with the CIO and Director of IT you discuss the company's recent acquisition - an engineering firm that specializes in Computer Aided Design (CAD). The engineering firm has 400 UNIX workstations that produce technical drawings which are currently stored on another vendor's SAN solution. The all UNIX environment uses NIS for authentication and name resolution. They do not currently use DNS or LDAP. The engineering company has an old storage system that has been experiencing problems and the CIO would like you to migrate the data onto the Isilon cluster. The CIO would like to eliminate all tape and recover the data onto disk.
The CIO is concerned about security of the company's intellectual property, especially with the rapid adoption of mobile devices and external cloud content sharing services such as DropBox, Egnyte, and SugarSync. They would like to implement an alternative that provides external file sharing and mobile device synchronization while maintaining security control over the company's data.
The Director of IT reports that users are storing non-work related content on the Isilon cluster. They would like to limit the amount of capacity that each user can consume in their home directory and want to ensure you provide the capability to easily visualize which users are over their allotment. The company's Windows users currently leverage Windows Shadow Copy to recover files that have been accidentally deleted. The IT department wants to ensure that Mac and incoming UNIX clients have the same functionality.
The Director of IT also mentions that users are reporting slow response times when browsing their home directories and shared folders. They are concerned that Isilon cannot scale to support their combined requirements.
The customer provides the following environment summary from the engineering firm's recently departed IT staff:
20 TB of Home Directory data
100 TB of active CAD projects
400 TB of archived data stored on tape at an offsite warehouse -- Exhibit -
Based on the meeting with the customer, which Isilon cluster configuration would you recommend?

A. 4 x NL400 nodes with 36 x 4TB drives
B. 4 x X400 nodes with 2 x SSD and 34 x 4TB drives 1 x Additional NL400
C. 6 x X400 nodes with 36 x 4TB drives 1 x Backup Accelerator
D. 9 x S200 nodes with 2 x SSD and 22 x 900GB SAS

Reveal Solution Discussion 0

Correct Answer: B 🗳️

Question #4

A media and entertainment company has asked for help in creating a new Video On Demand (VOD) storage system. The storage would be delivered to 5000 subscribers simultaneously. They would like to store 5000 hours of full length, High Definition (HD) movies.
What would be the best price-to-performance node(s) for this solution?