IBM C9020-668 시험

Question No : 1

What should the technical specialist explain when describing the addition of grid elements to an IBM FlashSystem A9000R?

• A.Up to 12 MicroLatency modules can be attached to a grid element.
• B.Six elements must be grown to nine elements initially.
• C.Element interface options must be the same type.
• D.MicroLatency module size can be intermixed.

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정답:
Explanation:
Grid elements installed must all be the same type (interface options and MicroLatency module size). An intermix of interface options or MicroLatency module capacities is not supported.
Note: Two grid controllers and one flash enclosure are combined to make one grid element.
Capacity, caching, and processing power are added at the same time by adding in one or more grid elements to scale up.
IBM Flash System A9000R consists of 2 - 6 grid elements, where a partially populated rack (2 - 5 grid elements) is expanded by adding grid elements to the maximum number of six-grid elements.

Question No : 2

Which solution meets a customer’s requirements for 100,000 IOPS, lowest latency, and maximum of 30 TB of raw capacity for an Oracle database?

• A.IBM FlashSystem A9000
• B.IBM Storwize V7000F
• C.IBM FlashSystem V9000
• D.IBM FlashSystem 900

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정답:
Explanation:
IBM FlashSystem 900 is designed to accelerate the applications that drive business C like those using an Oracle Database.
IBM FlashSystem 900 can scale usable capacity from as low as 2 TB to as much as 57 TB in a single system.
FlashSystem 900 delivers Tier 0 top application performance with up to 1.1 million 100% random read IOPS and 600,000 100% random write IOPS.

Question No : 3

A customer has locations in Singapore, London, and Denver and is considering IBM Spectrum Scale for its unstructured data.
How does IBM Spectrum Scale benefit this customer?

• A.It provides enterprise grade encryption.
• B.It is a cloud-only offering.
• C.It is a product with native CIFS support.
• D.It offers a global namespace.

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정답:
Explanation:
IBM Spectrum Scale provides a global namespace.
References:https://www.ibm.com/support/knowledgecenter/en/STXKQY_4.2.1/com.ibm.spectrum.scale.v4r21.doc/bl1ins_intro.htm

Question No : 4

A customer with a minimum IBM XIV configuration is upgrading to a full rack and plans to add SSDs for performance.
How many SSDs would be added during this upgrade?

• A.12
• B.9
• C.6
• D.15

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정답:
Explanation:
A minimally populated rack for models 281x-114 and 281x-214 contains three data modules and three interface modules, for a total of six modules.
A fully populated rack contains nine data modules and six interface modules, for a total of 15 modules.
References:https://www.ibm.com/support/knowledgecenter/en/STJTAG/com.ibm.help.xivgen3.doc/Gen3/PG/xiv_pln3rackconfigurations.html

Question No : 5

How does an IBM XIV System provide a guarantee of consistent performance even under the most dynamically changing elastic cloud workload environments?

• A.Built in performance monitoring of key resources
• B.Support for multiple versions of OpenStack software
• C.Use of a distributed grid architecture
• D.Capacity on Demand addition of useable storage

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정답:
Explanation:
IBM XIV Cloud Storage for Service Providers, or client hosted cloud solutions require elastic, rapid response, and dynamic demand that is captured within XIV’s 485 TB linear scalability, and the immediate and automatic redistribution, without interruption, of added capacity. The grid design stripes data across all modules and disks, incorporating data redundancy for consistent and predictable I/O performance that is always load balanced.

Question No : 6

When implementing disk encryption on an existing IBM TS7700, which action does a client need to take for the existing virtual volumes to be encrypted after the encryption feature is enabled?

• A.No additional customer action is required once encryption is enabled.
• B.The copy refresh command must be issued for each of the existing volumes.
• C.Any existing volumes will have to expire and be reused before being encrypted.
• D.The customer must assign existing virtual volumes with a new encryption policy.

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정답:
Explanation:
An encryption policy configuration is the set of rules, or policies, that specify which volumes are to be encrypted.
References: https://www-01.ibm.com/support/docview.wss?uid=ssg1S7005315&aid=1
IBM TS7700 Version 4 Release 1, Introduction and Planning Guide, page 123

Question No : 7

A customer wants to replace its legacy block storage environment with a new IBM FlashSystem A9000R solution and is concerned about properly estimating consolidated storage capacity after deduplication and compression savings.
Which tool should be used?

• A.IBM Comprestimator
• B.IBM Storage Tier Advisor Tool
• C.IBM Data Reduction Estimator Tool
• D.Capacity Magic

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정답:
Explanation:
Data Reduction Estimator tool is a command-line host-based utility for estimating the data reduction saving on block devices.
In order to help with the profiling and analysis of existing user workloads that need to be migrated to a new system, IBM provides a highly accurate data reduction estimation tool which supports both deduplicationand compression. The tool operates by scanning target workloads on any legacy storage array (IBM or 3rd party) and then merging all scan results to provide an integrated system level data reduction estimate.
References:https://delivery04.dhe.ibm.com/sar/CMA/SSA/06hb9/3/Data_Reduction_Estimation_Tool-1.02.htm

Question No : 8

A customer’s compliance department requires that data is kept for ten years. The data must be available as needed, and the customer must ensure that the data cannot be modified.
Which technology should the specialist recommend?

• A.NVMe flash
• B.SED drives
• C.NL-SAS drives
• D.WORM tape cartridges

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정답:
Explanation:
Write-once, read-many (WORM) tape cartridge characteristic. WORM format pervades the entirety of every WORM cartridge. The WORM tape media is formatted to give every block on a WORM cartridge write-once, read-many protection. Additionally, the cartridge memory (CM) has a WORM indicator byte in the cartridge type field.

Question No : 9

A cloud service provider is looking to provide a scalable solution that provides quality of service capabilities, ease of management, deduplication, and integration with OpenStack and VMware while providing sub-millisecond response time.
Which solution should the technical specialist recommend?

• A.IBM Storwize V5010
• B.IBM FlashSystem 900
• C.IBM FlashSystem A9000R
• D.IBM Spectrum Scale

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정답:
Explanation:
IBM FlashSystem A9000 can use the well-established IBM code base for OpenStack and REST API support.
IBM Spectrum Control Base V3.0 allows a simplified deployment and efficient integration of IBM FlashSystem A9000 with the VMware vCloud suite.
The FlashSystem A9000R data reduction node implements data deduplication and compression functions.
A9000 provides consistent and predictable microsecond response times and simplicity that you need.
References:http://www.redbooks.ibm.com/redpapers/pdfs/redp5325.pdf
IBM FlashSystem A9000 Product Guide

Question No : 10

A mainframe customer us considering moving from a native tape environment to a virtualized environment across two sites. A study has shown that it needs more than one IBM TS7700 at each site for performance and capacity reasons.
What is the benefit of using IBM TS7700 hybrid grid?

• A.It allows the customer to write data to the optimal storage hardware for each workload type.
• B.It allows clusters to connect using both FC and IP networks.
• C.It provides double the number of logical volumes.
• D.It permits a combination of IBM TS1130 and IBM TS1140 drives in one cluster.

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정답:
Explanation:
All TS7700 models can coexist in a grid. If only a disk and a tape-attached model are combined, that configuration is called a hybrid grid.

Question No : 11

A customer is interested in purchasing an IBM TS7650G ProtecTIER Gateway for its production site and one for replication at its DR site. The DR site is a target only site.
How is the cost of the solution affected by the replication?

• A.ProtecTIER replication is included with base license.
• B.ProtecTIER replication is included with hardware and no license is required.
• C.ProtecTIER replication licensing is required at both sites.
• D.ProtecTIER replication licensing is required at the primary site only.

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정답:
Explanation:
You must have a license for the replication feature for each ProtecTIER server in the replication grid.
References:https://www.ibm.com/support/knowledgecenter/en/STVRB7_3.2.0/ts7650ipg_replication.html

Question No : 12

Which statement correctly applies to PRO and Copy Data Services?

• A.RPO is the minimum time interval that a mirrored volume or consistency group lag behind the source volume
• B.Volumes backed up from clones do not affect RP
• C.RPO is a pre-defined parameter based on the type of replication selected.
• D.Multiple consistency groups can be supported with asynchronous mirroring for different RPOs.

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정답:
Explanation:
Consistency groups creates a consistent point-in-time copy of multiple volumes, with negligible host impact. You can enable FlashCopy consistency groups from the DS CLI.
Note: Recovery Point Objective (RPO) describes the interval of time that might pass during a disruption before the quantity of data lost during that period exceeds the Business Continuity Plan’s maximum allowable threshold or “tolerance.”
References:https://www.druva.com/blog/understanding-rpo-and-rto/

Question No : 13

Which feature of a base IBM XIV system is a technical advantage over competitive storage arrays?

• A.Always-on Compression
• B.SSD adaptive read caching
• C.Hot encryption
• D.IBM Spectrum Control Software

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정답:
Explanation:
Uniquely among IBM products, the XIV Storage System offers hot encryption. When encryption is enabled on the XIV system, all data that resides on it is encrypted within minutes, with no performance impact.
References:https://www.ibm.com/support/knowledgecenter/en/STJTAG/com.ibm.help.xiv.doc/xiv_elearning_reinventingstoragewithxivscript.htmlIBM XIV Security with Data-at-Rest Encryption, page 2

Question No : 14

A customer has experienced a high rate of drive failure and loss of data in its environment and is considering IBM XIV to replace the existing storage.
Which IBM XIV benefit should the technical specialist hightlight to the customer?

• A.Distributed cache
• B.Fast rebuild speed
• C.Distributed RAID
• D.IBM Hyper-Scale

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정답:
Explanation:
When an IBM XIV disk fails, all disks in the system participate in the rebuild. The outcome? It takes less time for theXIV system to restore full redundancy. For example, if a disk on a fully used 1 TB drive system fails, XIV restores full redundancy in an average of 30 minutes or less, and without a significant performance penalty. Traditional RAID systems might take up to a day to restore data reliability, with performance compromised during rebuild. The fast XIV rebuild time means that your data spends less time that is exposed to risk. In this way, the XIV system actually protects your data more than traditional enterprise storage systems can.

Question No : 15

A customer wants to storage system solution with proactive system health management. The customer has asked about advantages that the IBM FlashSystem A9000R offers.
Which feature should the technical specialist discuss?

• A.Grid architecture redundancy with hot standby
• B.Deduplication of data
• C.System call home feature
• D.Proactive phase out and self-healing mechanisms

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정답:
Explanation:
IBM FlashSystem A9000R also incorporates autonomic and proactive monitoring and self-healing features. These features enable preventive measures to preserve data redundancy before a component malfunction occurs.
References: IBM FlashSystem A9000R Product Guide, page 14
http://www.redbooks.ibm.com/redpapers/pdfs/redp5326.pdf