HCE-3700 Online Practice Questions and Answers

A 10K RPM Small Form Factor 600 GB disk drive has a 3 ms average rotational latency and a 4 ms average seek time.

How many random read IOPS would you expect from a 4D+4D RAID group using these drives before any consideration for cache hits or queuing optimization benefits?

A. approximately 570 IOPS

B. approximately 1,140 IOPS

C. approximately 1,530 IOPS

D. approximately 2,280 IOPS

Which two environments are suitable for cost effective use of Hitachi Accelerated Flash disk media? (Choose two.)

A. Online Analytical Processing (OLAP) data warehouse

B. Online Transaction Processing (OLTP) with HDT

C. large scale Consumer Video on Demand (CVOD)

D. Virtual Desktop (VDI)

In a VSP G200 system, what are two advantages of RAID 1+0 compared to RAID 5/6 for random write workloads? (Choose two.)

A. RAID 1+0 provides more useable capacity per for the same number of drives.

B. RAID 1+0 has less processing overhead.

C. Disk virtualization is lower.

D. RAID 1+0 has more efficient pre-fetch operation.

Which two statements are true about the Active Flash feature on the VSP Midrange? (Choose two.)

A. The Active Flash feature of Hitachi Dynamic Tiering monitors page access frequency in real-time, and immediately promotes pages that suddenly become busy.

B. The Active Flash feature can be enabled on any HDT pool as long as Tier 1 of the Dynamic Tiering pool is composed of SSD or FMD drives.

C. The Active Flash feature can be enabled on any HDP pool as long as the pool is comprised of SSD or FMD drives.

D. The Active Flash feature of Hitachi Dynamic Tiering monitors page access frequency in real-time, and promotes pages based on a predefined schedule.

A customer plans to migrate an interactive application from a VSP to VSP G1000. The application has consistent access across all its capacity with low hit rates and no particularly high I/O access areas. The application latency must be less or equal to 1.5 ms.

Which configuration do you recommend to satisfy the requirements?

A. an HDT pool consisting of SAS 10K and FMD drives

B. an HDP pool with FMD drives

C. an HDP pool consisting of NL-SAS and FMD drives

D. an HDP pool consisting of external LDEVs provisioned on a VSP F400 system

A user reports fluctuating LUN response times every day between 8:00 AM and 9:00 AM as users arrive and log in.

How do you identify this condition using Hitachi Tuning Manager?

A. View LUN response times and RAID group utilization (% busy) averaged over the 60 minutes.

B. View the random write counts every minute.

C. View LUN response times and RAID group utilization (% busy) every minute.

D. View LUN response times and correlate against the Cache Write Pending level every 15 minutes.

Which three key metrics are required for sizing applications? (Choose three.)

A. cache read hit ratios

B. IOPS

C. I/O read/write ratios

D. number of BED pairs

E. port speed

You are recommending RAID 6 to a customer for a non-database HDT pool.

What are two reasons for this recommendation? (Choose two.)

A. When capacity is pooled; the whole pool is affected when one parity group fails.

B. RAID 6 provides the most efficient use of system processor resources.

C. RAID 6 minimizes exposure to double disk failure.

D. RAID 6 provides the optimum overall performance of all RAID types.

A large bank is completing a capacity planning exercise and wants to upgrade their current VSP G1000 to properly support their online banking application for the next 18 months. The IT department wants to know where they should invest to achieve the transactional Service Level Objective (SLO).

In this scenario, which three recommendations would you make? (Choose three.)

A. Measure throughput of all SAN directors.

B. Export two months of Performance Monitor data.

C. Measure the storage resource utilizations.

D. Request a statement of growth requirements.

E. Measure the existing I/O profile.

You are troubleshooting a potential marginal link in a SAN fabric that you believe is causing a performance problem.

To troubleshoot this problem, which two actions will allow you to view the detailed port statistics? (Choose two.)

A. Use the vendor's GUI.

B. Use the appropriate host command(s).

C. Use the appropriate switch command(s).

D. Use SVP Performance Monitor.