C4090-454 Online Practice Questions and Answers

Which two application workload characteristics have the greatest impact on the throughput performance of the TS7700 Virtualization Engine? (Select two)

A. File size

B. Block size

C. Read/write ratio

D. Compression ratio

E. Number of tape drives utilized

As viewed from the front of the library, which frame can be configured as a service bay on the right side of the TS3500 High Availability Tape Library?

A. 3584-S24 frame

B. 3584-Lx3 frame

C. 3584-SC1 frame

D. 3584-HA 1 frame

Select two key items that are associated with the TS7700 Hardware Installation planning worksheets. (Select two)

A. Composite Library ID

B. SMS storage group name

C. Define VOLSER ranges for logical volumes

D. SMS Composite and Distributed Library Names

E. Customer IP addresses for the IP replication and Management Interface

What is a key characteristic of a disaster recovery (DR) solution compared to a high availability (HA) solution?

A. DR always requires human intervention while HA always is automated

B. DR means doubling all equipment in 2 separate sites while HA means doubling all equipment in a single site

C. DR only protects from natural disasters (fire, flooding, earthquakes etc) while HA only protects from IT equipment outage

D. DR protects from outage of a complete site while HA protects from outage of one or several individual elements in the IT infrastructure

A customer is impressed by the cost savings shown in the IBM proposal to consolidate their tape infrastructure replacing Oracle 9840 and 9940 tape drives with TS1140. However they are concerned about replacing their 9840 drives as they have a specific workload which requires fast access to the data. What is the best response to this concern?

A. the 9840 does not provide fast access so there is no issue

B. the TS1140 has a faster data rate than the 9840 so it will provide faster access to first byte of data

C. instead of a specific drive type for the workload, using the IBM Economy Data Cartridge provides the required fast access

D. the newer drive technology in the TS1140 will fail less frequently than the 9840 so overall provide faster access capability

According to the IBM TS7700 Performance white paper, why does it show that a T67720 has only a sustained I/O performance and a TS7740 has a sustained AND peak I/O performance?

A. Disk is faster than tape

B. A disk-based repository delivers more constant throughput rates

C. The TS7740 has to do pre-migration tasks at a certain point of operation

D. The TS7740 Fibre Channel disk cache does filesystem rebuilds from time to time

Which data can be encrypted when the TS7740 encryption feature code 9900 is enabled?

A. data on physical stacked cartridges

B. replicated data written across the network

C. data in the logical volumes written to the cache

D. all tape data before it is sent down the channel from the host

Which is the key benefit to be gained by adding the optional HA feature to a TS3SOO Tape Library?

A. Access time to data is halved

B. Drives can be added non-disruptively

C. Continued operation in case of failing accessory

D. Simple library expansion by removing the service bay

What is the minimum number of FC switches required to connect four TSI 140 drives installed in a TS3500 to a 3592 007 tape controller?

A. 0

B. 1

C. 2

D. 4

What copying activity does "Pull Cache Copy Throttling" limit on the TS7740?

A. the data copied from tape to cache

B. the data copied from cache onto tape

C. the data copied into the cache from another TS7740 cluster

D. the data copied out from the cache into another TS7740 cluster