PassGuide.C4090-456_70QA IBM C4090-456 IBM XIV ...

PassGuide.C4090-456_70QA

Number: C4090-456Passing Score: 800Time Limit: 120 minFile Version: 23.04

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IBM C4090-456IBM XIV Storage System Technical Solutions V4

All the questions are new one.there is no repetition of any question.

This VCE has a lot of questions where all answers are up-to-date.

The material is well organized and well presented in this VCE.

Exam A

QUESTION 1Which statement is true about the XIV migration?

A. Data can be migrated without any host interruption.B. The customer must also purchase a SAN Volume Controller.C. Before commencing migration the optional license must be installed.D. The customer must be aware that a short period of host downtime is needed.

Correct Answer: DSection: (none)Explanation

Explanation/Reference:

QUESTION 2Expanding an XIV system with more modules for capacity and performance is an example of what?

A. a non-shared cluster architectureB. a grid-based storage architectureC. a clustered dual controller architectureD. an active-passive controller architecture

Correct Answer: BSection: (none)Explanation

Explanation/Reference:answer is verified.

QUESTION 3What is the fastest way to see which volume is receiving the most IOPS on the XIV?

A. openXIVTopinthedefaultviewB. opentheXIV GUI and checkthe volume viewC. run XCLI command xcii volume_max_iops_listD. open XIV GUI and select the first 12 volumes, and then next 12 and so on

Correct Answer: ASection: (none)Explanation


QUESTION 4XIV hardware architecture optimizes the usage of snapshots by:

A. copying data on write so the production drives are not over stressedB. offering the possibility to isolate the drives used for snapshot target spaceC. a redirect-on-write operation using all drives in any snapshot processD. limiting the total number of snapshots to a maximum of 128 active pairs

Correct Answer: CSection: (none)Explanation

Explanation/Reference:Explanation:

QUESTION 5Which of the following external power inputs is available for full power redundancy of a six module XIVsystem?


A. four 20 amp, three-phaseB. six 20 amp, single-phaseC. four 30 amp, single-phaseD. two 30 amp, three-phase



QUESTION 6A customer has purchased a six module XIV Gen3 for a new project, which is located in a new data center.A new requirement states that a portion of the project data must be replicated to an existing six module XIV(Gen2) at the customer's primary data center, 500 km away. The target XIV has sufficient capacity but noFibre Channel connectivity exists between sites. The customer therefore decides to use iSCSI replication.

Which upgrade is required to meet the requirements?

A. add modules to both XIV systemsB. add modules to the new (primary) XIV Gen3C. add modules to the existing (secondary) XIVD. replace the new (primary) XIV Gen3 InfiniBand switches with Ethernet switches



QUESTION 7A customer builds a solution with SAN Volume Controller and an XIV system.

For best performance how many paths should be used between the SVC and the XIV system?

A. each I/O group must have one path to all available XIV interface modulesB. each SVC port should have one path to all available XIV interface modulesC. each SVC cluster should have one path to all available XIV interface modulesD. all XIV interface module FC ports should be zoned to each FC port on each SVC node



QUESTION 8A customer wants to know if a Solaris 9 with DMP 5.1 can be used in a configuration with a QLogic HBA.Where would this information be found?

A. IBM XIV InfoCenterB. IBM XIV Architecture, Implementation and Usage RedbookC. IBM System Storage Interoperation CenterD. Raise an RPQ to clarify support


Explanation/Reference:answer is modified.

QUESTION 9Which XIV system feature simplifies creation of the XIV volume?

A. storage poolsB. thin provisioningC. data distribution algorithmsD. SSD caching



QUESTION 10A customer is planning to buy a nine module XIV configuration. They have requested the exact power andcooling needs for this configuration.

What is the recommended document to consult for this information?

A. IBM XIV Introduction and Planning GuideB. IBMXIV Storage System Data SheetC. IBM InteroperabilityMatrixD. IBM Redbooks



QUESTION 11On an XIV system, what factor must be considered when using snapshots?

A. snapshots must be unlocked before restoreB. restoring a snapshot invalidates all earlier snapshotsC. snapshots cannot be moved independently to another storage pool

D. 17 GB of hard capacity is immediately consumed at creation per snapshot



QUESTION 12What is the benefit of VMware VAAI functionality?

A. provides multipathing for VMware servers to XIV systems B. extends XIV storage provisioning functions to VMware vOenterC. allows offloading extended VMware operations to the XIV systemD. integrates VMware disasterrecoverywith XIV remote replication



QUESTION 13On an XIV system, what is the minimum hardware configuration when the Capacityl on Demand feature isused?

A. 6 modulesB. 9 modulesC. 12 modulesD. 15 modules



QUESTION 14A customer wishes to mirror volumes between two XIV systems across Ethernet. What is the simplest wayto achieve this?

A. route Fibre Channel across IPB. use the XIV system's SCSI portsC. route InfiniBand across EthernetD. connect interlace modules using a crossover cable



QUESTION 15Which of the following is a benefit of the XIV system's hardware architecture?

A. mirrored interface modules provide increased data throughput

B. data distributed across all hard drives improves system throughputC. SAS bus interface allows the use of industry standard Enhanced IDE drivesD. InfiniBand connectivity between XIV systems for extended distance mirroring



QUESTION 16In a six module XIV system, I/O activity involving a specific logical volume is handled by how manyspindles?

A. 36B. 72C. 108D. 180



QUESTION 17Which activity occurs after upgrading an XIV system from nine modules to ten modules?

A. the SAN fabric is re-zoned to include another two host portsB. the default extent size is increased by 11.1% or 512K, whichever is smallerC. pools are reconfigured to include an additional twelve disks, less the hot sparesD. the system redistributes all data across all drives



QUESTION 18An XIV administrator wants to migrate a legacy DS4700 to XIV. The DS4700 is mirrored across a low-bandwidth link to a second DS4700 at a second site. The XIV volumes will need to be mirrored to a secondXIV using asynchronous replication.


What feature will help perform this task?

A. offline initializationB. volume mirroringC. cache-disabled volumes

D. asynchronous migration



QUESTION 19PowerVM is a requirement for XIV host attach to which of the following operating systems?

A. AIXB. IBMiC. VMwareD. LinuxonSystemz



QUESTION 20How does IBM XIV SSD technology provide longer life over competitors' use of SSD technology?

A. hybrid algorithms combine features of SSDswith existing HDDsin the same unitB. patented wear-leveling algorithm designed for SSD longevityC. common off-the-shelf components minimize the use of SSDs for write environmentsD. IBM SSDs are filled with write blocks of 1024kb in random I/O operations



QUESTION 21How does the data migration feature enable the smooth transition of a host to an XIV system?

A. By deploying an XIV unique implementation of VMware's Storage vMotion that has been engineered tosupport Linux and Microsoft hosts natively.

B. By connecting the host to the XIV, which then provides access to the data on the legacy storage systemwhile transparently copying the data across in the background.

C. By enabling everyXIV PC portto be both target and initiator so that host requests are received bythe XIVand retransmitted to the legacy storage system simultaneously.

D. By using the XIV Host Attachment Kit (HAK) migration software to send concurrent writes to the legacystorage system and the IBM XIV simultaneously, while copying the older data across in the background.



QUESTION 22During data migration from a legacy storage system to the XIV system, there are eight hosts accessing

eight separate volumes.

What is the maximum number of volume migrations allowed in the background while the eight hosts areactively running?

A. 1per defined targetB. 2perdefinedtargetC. 4perdefinedtargetD. 8perdefinedtarget



QUESTION 23The XIV host attachment kit provides which of these functions?

A. automates replication failover operationsB. allows host copy operations to be offloaded to the XIVC. provides a multipathing driver for the operating systemD. adjusts host operating system performance parameters



QUESTION 24A customer wants to set up a Windows 2008 cluster with three nodes, with application data presented froma fifteen module XIV Gen3. All three nodes will run applications under normal operating conditions. Eachnode has a single dual- port Fibre Channel host bus adapter.

Assuming a dual fabric SAN, how should the cluster nodes be zoned to the XIV within each SAN?

A. ports for all three nodes should be grouped together into a single zone, along with a single XIV portfrom each available XIV interlace module

B. each host port should be zoned to a single port from one XIV module, ensuring that no other host portsare zoned to the same module

C. each host port should be zoned to a single port from two XIV modules, ensuring that the host ports fromthe remaining two nodes are zoned to different XIV modules

D. each host port should be zoned to a single port from three XIV modules, ensuring that the host port onthe second fabric is zoned with a single port from the remaining three XIV modules



QUESTION 25On an XIV system, how can a thin provisioned volume be changed to a regular provisioned volume?

A. in the GUI, right mouse click on the volume and select"regular provision"B. in the XCLI, use the command vol_resize on the volume

C. in the XCLI, use the command pool_change_config on the pool containing the volumeD. in the GUI, right mouse click on the volume and move itto a regular pool



QUESTION 26Which statement is true regarding XIV virtualization and the advanced snapshot mechanism?

A. A volume can have one snapshot only.B. A volume's snapshot can be copied to a volume in another storage pool.C. A volume and its corresponding snapshots can be part of several storage pools.D. A volume and its corresponding snapshots can be part of several consistency groups.



QUESTION 27Which XIV system feature increases the level of reliability of the system?

A. snapshotsB. protected cacheC. Quality of ServiceD. solid state drives



QUESTION 28What is the online tool that should be checked for supported host interoperability?

A. 1331B 331

B. 3310C. IT Security



QUESTION 29On a thin-provisioned pool the size of the volume is limited by:

A. the hardcapacityof the XIVB. the hard capacity of the volume

C. the soft capacity of the storage poolD. the hard capacity of the storage pool



QUESTION 30A customer has requested a highly available solution with fully concurrent fail over for a VMware farm ofhosts. The customer also has Oracle databases that demand very low latency (0.5 ms and lower). Whatwould be the best solution for this environment?

A. SVC with XIV and IBM FlashSystems (RamSan), plus enable Easy TierB. Two XIV systems setup in synchronous mirrorwith SSD5 and VMware SRMC. Two XIV systems setup in asynchronous mirror with SSDs and VMware SRMD. SVC stretch clusterwith XIV and IBM FlashSystems (RamSan), plus enable EasyTier



QUESTION 31Which tool can natively manage an XIV system?

A. Veritas StorageFoundationSuiteB. IBM Systems DirectorC. Tivoli Storage ManagerD. Tivoli Storage Productivity Center



QUESTION 32When considering total cost of ownership what is a benefit of IBM XIV system?

A. eliminates human error during administrationB. eliminates any down time during the implementationC. gives the option to license only the required number of hostsD. bundles all features in the main license so there are no ¡°hidden¡± costs



QUESTION 33Which statement is true when comparing an XIV Model 214 to Model 114?


A. Model 214 supports more HDDs in a fully configured system.B. Model 214 supports ECoFconnectivityover dedicated ports.C. Model 214 adds aniSCSI 10Gb/s configuration option.D. Model 214 adds SSD caching functionality.



QUESTION 34How much space will an XIV snapshot allocate from the pool's snapshot reserve when its created?

A. 17GBpersnapshotB. 17GBperpoolC. 17GB pervolumeD. 0 GB per snapshot



QUESTION 35Which of the following is a benefit of the XIV system's storage allocation methodology?

A. parityis protecting data across all modulesB. one MB partitions ensure efficient cache utilizationC. all workloads are distributed throughout the systemD. storage pools are always allocated on separate physical disks



QUESTION 36How does the XIV system protect data arriving from hosts?

A. each module internally mirrors its cache to a special segment of memoryB. MPIO distributes a single I/O down multiple paths to different XIV modulesC. data is written to a single module before acknowledgement to the hostD. all data is written to cache in two modules and then acknowledged to the host



QUESTION 37Which is the correct method to access the XIV Multi-system Manager (MSM)?

A. VMware vOenter console to the MSMB. Remote Desktop (RDP) session to the MSMC. Puttysession to the MSM P addressD. XIV GUI to the MSM using server mode



QUESTION 38A customer demands NES and block access to their storage solution, but is also interested in XIVtechnology. The customer wants to have easy administration for both NES and block. They would also liketo combine the solution with an IBM HSM solution. The initial need for storage is 500 TB and grows by 500TB every five months.

What would be the best solution for this customer?

A. AIX with the XIV connected to itB. SVC with the XIV connected to itC. N series gateway with XIV as back-end storageD. SONAS gateway with XIV as back-end storage



QUESTION 39When is the best time to complete a TDA for XIV?

A. after the XIV hardware is installedB. before the customer starts to use the XIV hardwareC. after the XIV hardware is orderedD. during the pre-sales activity before the hardware is ordered



QUESTION 40A customer reports performance problems on an XIV Gen3 system. After further analysis of performancestatistics, it appears that latency is high for reads but writes are acceptable. I/O size is generally small, with

more writes than reads. Which option is likely to help the situation?

A. implementvolume striping on the hostB. installSSDsintheXIVsystemC. install ECoE adapters in the hostD. enable IBM Easy Tier on the volumes



QUESTION 41For optimum redundancy, how many paths between the host and a 15 module XIV should be configuredfor each LUN?

A. 12 pathsB. 6 pathsC. 4 pathsD. 2 paths



QUESTION 42A customer wants to ensure resource availability for their SAP application by implementing Q0S.How could the performance class be defined?

A. limited to 10,000 IOPS and add the SAP application servers to itB. limited to 10,000 IOPS and add all hosts except the SAP application to itC. for half of the interface modules add all hosts, with the remaining modules serving the SAP applicationD. for half of the interface modules add the SAP application, with the remaining modules serving all other I/

O



QUESTION 43A customer complains that their SAP database now performs worse than it did before being migrated fromtraditional RAID storage to XIV. The database was configured using 20 x 200GB XIV LUNs presented to anAIX 6 host OS where they are concatenated and striped into six volumes for the databases and logs. Nochanges have been made in the transition to XIV.

What if anything can be done to improve performance?

A. the SAP volumes should be put into a QoS Performance ClassB. add Fibre Channel adapters to the host and balance volumes across the adaptersC. implement static load balancing and increase the queue depth of the host adaptersD. the databases should be reorganized into larger volumes on the XIV and not striped within the OS



QUESTION 44Which two of the following IBM products assure online data migration? (Select two)

A. DS8870B. XIV Storage SystemC. SAN Volume ControllerD. DS5000seriesE. FlashSystems

Correct Answer: BCSection: (none)Explanation


QUESTION 45A customer wants to know how much capacity has been consumed against the Capacity on Demandentitlement on their XIV system.

How would the technical specialist determine the capacity consumed?

A. running the XCLI command cod_listB. running the XCLI command system_capacity_listC. running the XCLI command vol_list and summing the Used Capacity columnD. looking at the soft consumed capacity in the bottom left corner of the XIV GUI



QUESTION 46What is the maximum period of time the XIV system stores detailed host and volume data?

A. foreverB. 365daysC. 90daysD. 30days



QUESTION 47Based on best practice, what is the optimal number of SVC Fibre Channel connections to a full 15module XIV?

A. connect the SVC to 6 XIV portsB. connect the SVC to 9 XIV portsC. connect the SVCto 12 XIV portsD. connecttheSVCtol6XlVports



QUESTION 48Following a proof of concept, it has been determined that an eleven module XIV system containing 2 TBdrives is the minimum configuration suitable for the workload, which consists primarily of random writes.The customer is concerned about the upfront costs so the sales representative has suggested a sixmodule system with 3 TB drives, which would also provide ample capacity for the application.


Given the customer's concerns, which configuration should the technical specialist recommend to bestmeet the customer's requirements?

A. a six module XIV with 3 TB drives and SSDsB. an eleven module XIV with 3 TB drives and six CoD activationsC. an eleven module XIV with 2 TB drives and eight CoD activationsD. a nine module XIV with 2 TB drives and six CoD activations



QUESTION 49When creating a thin provisioned volume on an XIV the maximum capacity is limited by:

A. the vol_size_max configuration parameterB. the availablecapacityin the XIV systemC. the softcapacityof the storage pool where the volume residesD. the hard capacity of the storage pool where the volume resides



QUESTION 50When is the command xcii --protect used?

A. to create an encrypted host on the XIV

B. to create an encrypted volume on the XIVC. to create an encrypted file with username and password forXCLl usageD. to create an encrypted file with all commands used after command has been entered



QUESTION 51On XIV what factors are important to successfully implement asynchronous mirroring?

A. data change rate, available bandwidth and intervalB. latency between the remote and local XIV, number of volumes must be less than 256C. data change rate, number of volumes less than 256, required RPOD. each mirror must have the same RPO and sync interval within the same storage pool



QUESTION 52What is a benefit to IBM's XIV SSD transparent read cache?

A. SSD read cache is a separate tierB. performance improvement in sequential readsC. real-time cache algorithm; not policy-basedD. SSD drives add usablecapacitywithout user intervention



QUESTION 53How many active module interconnects are there between data modules on an XIV system ModelA14?

A. one EthernetconnectionB. two EthernetconnectionsC. four Ethernet connectionsD. sixEthernetconnections


Explanation/Reference:answer is corrected.

QUESTION 54Where is the XIV VSS Provider software installed?

A. as a plug-in to the XIV GUIB. on the XIV maintenance moduleC. on servers or VMs connected to the XIV systemD. on the interface modules of the XIV system



QUESTION 55When does XIV Gen3 SSD caching significantly improve performance?

A. for small block, random read I/O workloadsB. for GPES random workloadsC. for large block, sequential read I/O workloadsD. for small block, sequential write I/O workloads



QUESTION 56Which of the following statements is true of the XIV architecture?

A. Storage Pools are used to group volumes with similar performance requirements.B. For each mirrored 1 MB partition, one copy is always on an interface module.C. In a fifteen module XIV, fifteen physical disks are allocated as hot spares.D. Every logical volume is spread over every physical drive.



QUESTION 57A TELCO customer has an application that generates intensive small block random reads. The customerinstalled one XIV Gen3 system and is dissatisfied with this choice. They have enough performance onwrites and sufficient capacity.

In order to consolidate more applications what should the technical specialist advise?

A. order an extra frame with SAS 15k drivesB. orderthe SSD option and use itin conjunction with Q0SC. use external storage with FC drives and virtualize it under XIVD. request IBM to change the nearline SAS drives with SAS 10k drives



Explanation:

QUESTION 58Compared to other IBM storage offerings, which of the following is unique functionality on an XIV system?

A. IP based replicationB. prevents hotspotsC. ability to take snapshotsD. reduced single points of failure



QUESTION 59The modem installed in the XIV is used for what?

A. externally servicing the systemB. the Call Home featureC. setting up modulesD. XRSCconnectivity



QUESTION 60Which statement is true regarding XIV connectivity to IBM PowerVM VIOS clients?

A. NPIV must be used.B. NPIV is not supported.C. Direct iSCSI connection to VIOS is supported.D. AIX, Linux and IBM i VIOS clients are supported.



QUESTION 61What technology integrates XIV in the VMware hypervisor?

A. DRSB. SPMC. VAAID. Storage vMotion



QUESTION 62An XIV snapshot is taken daily from the same volume and kept for one week.

If it is Friday and the system is restored from a snapshot taken on Tuesday, why is it possible to return to asnapshot taken on Thursday?

A. because the deletion priorityis set correctlyB. because there are no dependencies between subsequent snapshotsC. because there is sufficient space in the snapshot reserveD. because snapshots were all converted to full copy



QUESTION 63A customer has legacy Windows 2003 servers to connect to an XIV. What software is required to beinstalled on the host?

A. XIV HAKB. XIV GUIC. XIV TopD. XIV VSS



QUESTION 64The XIV Gen3 module interconnect implements which technology?

A. iSOSIB. InfiniBandC. SAS2JJD. PC


Explanation/Reference:answer is modified.

QUESTION 65A technical specialist is planning an XIV installation. Where can the worksheets needed for installation befound?

A. IBM XIV Storage System Planning GuideB. IBM XIV Gen3 Architecture, Implementation and Usage GuideC. IBM XIV Host Attach Redbook

D. IBM Fix Central



QUESTION 66XIV Quality of Service limits I/O to which of the following?

A. hostsB. storage poolsC. mirrored pairsD. consistency groups



QUESTION 67What is a benefit of the XIV system's grid-based architecture?

A. differentcapacitydrives can be mixed within the system but not in the same moduleB. any module can act as an interface moduleC. SSDs must be installed in the interface modules onlyD. each module contains processing, caching and storage



QUESTION 68Which of the following occurs in the event of an SSD failure in an XIV system?

A. The failed SSD's contents are rebuilt onto the hot spare SSD in the maintenance module.B. The module containing the failed SSD is phased out and all data is redistributed to the

remaining modules.C. The extended read cache workload of the module with the failed SSD is redistributed to the remaining

modules.D. All cached write data on the SSD is destaged to disks and SSD caching is disabled until the failed SSD

is replaced.



QUESTION 69What minimum information is required when creating a volume on an XIV system?

A. capacity, RAID level, disk groupB. drive type, disktier, capacityC. capacity, storage pool, volume nameD. Quality of Service, consistency group, volume name



QUESTION 70A storage administrator wishes to migrate a legacy storage controller's volumes to a SAN VolumeController. The controller can provide SAS or iSCSI host connections only. An XIV is virtualized by the SVCand has been upgraded from six modules to nine to assist with the migration project. The additionalstorage is yet to be presented to the SVC.

What would be the best method to transfer the data?

A. Presentvolumestothe SVC using SAS. Mirrorthe volumes onto the newly-presented XIV storage.B. Present volumes to the SVC using iSCSl. Mirror the volumes onto the newly-presented XIV storage.C. Present volumes to the XIV using SAS. Migrate the volumes to XIV using the availablecapacitythen to

the SVC.D. Present volumes to the XIV using iSCSl. Migrate the volumes to XIV using the availablecapacitythen to

the SVC.




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