On a VSP G1000, the maximum I/O Request Limit for an external initiator port has been exceeded. What are two consequences of this activity? (Choose two.)
A. New writes will back up into the VSP G1000 cache.
B. The host will see rapidly rising response times per request.
C. The host will see a minor change in response times.
D. The host will not be able to process new I/O requests.
Which two port options are bi-directional on a VSP G800? (Choose two.)
A. Replication-Target (RCU)
B. Open Target (TAR)
C. External Target (eLUN)
D. Mainframe (FICON)
How many back-end disk operations are normally required to complete a small block random write operation to a LUN on a RAID 5 group?
A. 2
B. 3
C. 4
D. 6
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 three functions are performed by a VSP G1000 Virtual Storage Director (VSD)? (Choose three.)
A. It executes host I/O requests.
B. It calculates parity.
C. It manages cache segment usage.
D. It moves data to/from cache.
E. It executes software such as HDP or copy products.
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 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)
What are two appropriate criteria for evaluating a batch job performance? (Choose two.)
A. elapsed time and/or throughput (MBs, IOPS)
B. storage response time
C. customer requirements
D. host initiators utilization
You are evaluating storage system performance for an interactive workload. What are three appropriate criteria in this situation? (Choose three.)
A. customer requirements
B. throughput (MBs)
C. elapsed time
D. storage system response time
E. resource utilization (% busy)
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