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H13-621 HCNP-Storage-CUSN(Constructing Unifying Storage Network) Questions and Answers

Questions 4

Under Linux platform, one of Multipath installation failure is the old version not completely uninstalled, which of the following methods can solve the problem?(Select 2 Answers)

Options:

A.

check whether multipath installation package format is correct, perform dos2unix XXX.rpm

Or to get the original format of multipath installation package

B.

the RPM database damage may occur, perform the rpm - rebuilddb, repair the RPM database, to execute queries or uninstall

C.

perform rpm - q UltraPath, check version of multipath installed, uninstall the old version of the multipath, execute the rpm -e UltraPath or execute the rpm - e - allmatches XXX.rpm, remove multipath related files, restart and re-install

D.

path uninstall may have abnormal issue which cause OS system cannot automatically clear multipath startup of /boot/grub/menu.lst file, edit the/boot/grub/menu.lst file, delete the multipath startup, after the restart, then re-install

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Questions 5

Writethrough strategy of S5000T system is first write to the cache before write each IO request, mean write successful after written to disk.write back strategy is write each IO request to the cache mean write successful, so the performance of write back strategy is better than writethrough strategy.But write back strategy, exists the risk of loss cache data in system abormal power down.

Options:

A.

True

B.

False

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Questions 6

Which of the following statements about IO size are correct? (Select 3 Answers)

Options:

A.

the amount of data size of deciding an IO request carries once

B.

every IO data logically is discontinuous

C.

IOPS decreases continuously with the increase of data blocks

D.

bandwidth value increases with the increase of data blocks, but the trend of increase is gradually slow, until leveled off

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Questions 7

About iSCSI protocol implementation of three parts, which describe are right? (Select three

Answers)

Options:

A.

initiator Portal: provide connection iscsi storage device and ISCSI packet parsing and the driver of data reading and writing.

B.

Target Portal: iscsi storage devices, provide data storage services

C.

Portal: by IP address and port (default of iSCSI is TCP3260), through the Portal to provide connectivity and services

D.

initiator Portal: iscsi storage devices, provide data storage services

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Questions 8

About RAID, which of the following description are correct? (Select 3 Answers)

Options:

A.

RAID5 recommended the number of member disk is 5 to 9, RAID10 recommended the number of mirror in group is 2

B.

capacity of RAID5 is N-1 / N, N is the number of member disk

C.

capacity of RAID10 is N/M, N is the number of member disk, M is the number of mirror in group

D.

when the pressure of front-end is enough, the performance of Raid5 write bandwidth and Raid10 bandwidth are same

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Questions 9

Cache mirroring technology means that data is written to a controller, at the same time, to which module will the data be written?

Options:

A.

to end controller mirroring Cache

B.

data safe

C.

the server Cache

D.

the hard disk cache

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Questions 10

Link bandwidth of Storage array remote replication data transmission is not adjusteD.

Options:

A.

True

B.

False

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Questions 11

In standard optical fiber environment, contains node, port, link and other components, which of

the following is true? (Select three Answers)

Options:

A.

node is refers to fiber optic equipment, such as servers, disk and etc

B.

each node at least one port, port provides external actual links, usually realize by server HBA card

C.

link is actual transmission medium, used to move information from one node to another node consists of a pair of optical fiber linE. A single fiber line is connected to a port of receiver, transmit information to optical fiber cable of this interfacE.

D.

a node only can have one port

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Questions 12

For snapshot , LUN copy and remote replication of storage array, which of the following statement is true? (Select 3 Answers)

Options:

A.

add resources LUN in resource pool, controller A and B both added and equal size, which is the best

B.

create LUN copy if confusing the source LUN and target LUN may result in data loss

C.

create remote copy if confusing the source LUN and target LUN may lead to the data unavailable

D.

if the space of the resource pools is insufficient, system will automatically use the residual capacity of safe space as a resource pool space

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Questions 13

For common maintenance tools of storage array, which of the following description is wrong?

Options:

A.

information collection tool has the characteristics of graphical interface operation, run across the operating system, multi-language switch and free installation

B.

upgrade inspection tool has the characteristics of automatic judgment inspection items, reduce risk and reduce the skill requirements

C.

the business management function can realize the visual display device of the current topology connection status

D.

DHA service management refers to collecting the hard disk health data/performance data warehousing, support start-stop, set, export, comes back

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Questions 14

When deploy N8000 system by ISM, which of the following characteristic of the management software are not used?

Options:

A.

RAID, LUN, iSCSI, target device, connecting LUN creation

B.

resource pool, snapshot, LUN copy deployment

C.

support for the management of the basic characteristics of Symantec's SF, SFS

D.

the storage network management

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Questions 15

The default mode of FC host interface and host communication is arbitrated loop in SAN storage array, the host side HBA card usually adopts adaptive communication mode

Options:

A.

True

B.

False

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Questions 16

when SAN storage array power up, enter into MML mode, sys status check System Running Status: ( normal mode ) normal mode shows power up successful for the system.If it is not normal mode, can judge power up failure for the system.This judgment method of system startup anomaly is correct.

Options:

A.

True

B.

False

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Questions 17

The failure of install multipath is mostly due to compatibility, which components mainly needs to consider compatible when install multipath? (Select three Answers)

Options:

A.

with OS specific version

B.

with HBA card

C.

server system hard disk drive

D.

with iSCSI initiator software

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Questions 18

In the same case of IO environment and disk type, which of the following description of RAID5/RAID10 Performance Comparison is wrong?

Options:

A.

Space utilization: Raid5 is obviously better than Raid10

B.

Security: Raid5 is lower than Raid10

C.

When read the business which belongs to large files, the performance of Raid5 is obviously better than Raid10

D.

When read the business belongs to the Radom small IO, Raid5 is the best choice

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Questions 19

Which command is needed to use when installing UltraPath under AIX?

Options:

A.

installp

B.

rpm

C.

pkgadd

D.

swinstall

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Questions 20

Running df output on AIX ias follows:

# df /kyleFilesystem 512-blocks Free %Used Iused %Iused Mounted on /dev/hd2 16056320 1925384 89% 110034 100% /kyle

At this time, it can't create a file or folder in this /Kyle directory.

Options:

A.

True

B.

False

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Questions 21

For storage array LUN copy function, same LUN can't do multiple incremental source of LUN copy.

Options:

A.

True

B.

False

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Questions 22

Without the deployment of multi-path software, if the storage system map a LUN (Logical Unit Number) to an application server, and with the method of multiple paths are linked together, which of the following opinions about application server situation is correct?

Options:

A.

in the operating system, it will find the two same size of volume as the LUN

B.

can realize the automatic switching of multiple links

C.

can realize the load balance of multiple links

D.

compared with single-link network, there is no difference on the server-side

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Questions 23

In the storage array, which of the following situations would not lead to a snapshot fault?

Options:

A.

the source LUN in RAID group failure

B.

resource LUN in RAID group failure

C.

there is insufficient space on the resource pool

D.

the source LUN in RAID groups of relegation

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Questions 24

which level that MSCS cluster software reliability guarantee can belong to ?

Options:

A.

network layer

B.

operating system layer

C.

hardware driver layer

D.

file system layer

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Questions 25

Because of differences in the operating system itself, each of multi-path software has different compatible versions under the different operating systems, and even different versions of the same operating system, may have different multipath versions, so before installing the multipath software, need to query version supporting table, confirm the compatibility between multipath and OS, HBA carD.

Options:

A.

True

B.

False

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Questions 26

Compared with SCSI protocol in the actual application, which belongs to the advantage of the iSCSI? (Select three Answers)

Options:

A.

the cost is low

B.

make full use of TCP/IP network

C.

need parallel transmission cables

D.

long transmission distance

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Questions 27

Under Linux, which are the basic principles of the dd command test performance tuning? (Select 3 Answers)

Options:

A.

read and write by bytes, collect performance data in an all-round way

B.

it suggest that setting up reading and writing block is from big to small

C.

in the process of reading and writing and performance testing, for IO influence factors, need to analysis, and find out the reason

D.

analysis from small to large, and analysis of the online business is more efficient at the same time

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Questions 28

What kind of Remote copy link in array can divided into according to the order of the controller? (Select 2 Answers)

Options:

A.

parallel link

B.

cross link

C.

FC link

D.

iSCSI link

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Questions 29

For Huawei's storage system, which of the following description of global hot dish is correct? (Select 3 Answers)

Options:

A.

after refactoring of hot dish participate in a member disk of RAID group failure, automatically becomes member disk of RAID group, the original fault members disk automatically becomes hot spare disk after replacement for new dish

B.

hot plate uniform distribution, recommend at least 1-2 pieces of hot plate each box

C.

hot dish has no data protection for RAID0

D.

the safe disk cannot be used as hot spare

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Questions 30

ATA to SATA is actually from serial to parallel shift.

Options:

A.

True

B.

False

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Questions 31

Synchronous remote replication connection between two storage array can use FC link or iSCSI link, and which can use the two kinds of links to connect at the same timE.

Options:

A.

True

B.

False

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Questions 32

The characteristics of the internal management is management network separated from production data link.

Options:

A.

True

B.

False

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Questions 33

LUN copy S5000 incremental must interrupt host operations of reading and writing for the data of S5000 source LUN

Options:

A.

True

B.

False

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Questions 34

About storage network management software, which description is wrong?

Options:

A.

equipment management can manage storage array device

B.

business management, business flow management

C.

topology display, visual display device of the current topology connection status

D.

DHA service management, hard disk health data/performance data

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Questions 35

The most important three part of SAN network in technically: device interfaces (E. g, SCSI, fiber channel and ESCON, etC. ), connection device (switches, gateway, router and Hub, etC. ) and communication control protocol (E. g iSCSI and FC, etC. ) the three components plus additional storage devices and servers, constructed SAN system from the component, the SAN can be divided into host,HBA, switches, storage devices of the two is not match.

Options:

A.

True

B.

False

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Questions 36

If plan bank of SAN storage system, use to store customer orders and account information, please select the most appropriate level of RAID

Options:

A.

RAID 0

B.

RAID 1

C.

RAID 10

D.

RAID 5

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Questions 37

In the Linux platform, the host connected to the storage array, which of the following statement is wrong?

Options:

A.

after add mapping to host in array, sweep plate operation must be conducted on host, to see the map

B.

connect between a host and the storage arrays by IP SAN, which must configure business IP for host

C.

connect between a host and the storage arrays by IP SAN, suggested that the iscsi initiator name of the different host changed to the same alias

D.

after sweep plate operation on the host, use command fdisk -l to see the mapping which does not distinguish between equipment and physical mapping

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Questions 38

Through which two ways can detect the hard disk bad way in OceanStor storage system? (Select two Answers)

Options:

A.

read/write failure automatic analysis

B.

hard disk medium active scan

C.

power test

D.

business data flow anomaly detection

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Questions 39

Substitution method is to use a normal part to replace a suspected abnormal part, so as to achieve the parts of the aim of locating faults and troubleshooting, can be a fiber optic jumper, a cable, a controller or a cascade modulE.

Options:

A.

True

B.

False

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Questions 40

To run the first line which lsscsi command export at the linux which computer only connect FC storage as follows:

(0:0:0:0) disk VMware, VMware Virtual S 1.0 /dev/sda

(1:0:0:0) disk Huawei, S2600 -

(1:0:0:1) disk Huawei, S2600 -

(1:0:0:2) disk Huawei, S2600 -

(2:0:1:0) disk Huawei, S2600 /dev/sdb

(2:0:1:1) disk Huawei, S2600 /dev/sdc

(2:0:1:2) disk Huawei, S2600 /dev/sdd

Known 0:0:0:0 is the only local disk for this machine

Which of the following are true? (Select 3 Answers)

Options:

A.

at least have 2 pieces of FC HBA card in this server

B.

this server connect to storage array use the multipath

C.

six LUN assigned to this server

D.

three LUN assigned to this server

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Questions 41

Multipath install failure in Windows platform in the case of old version do not completely uninstall, which of the following method can solve the problem? (Select two Answers)

Options:

A.

delete the current setup of UltraPath for Windows, restart the host and reinstall.

B.

in the registry search 'UltraPath' registry key, delete the related key values of UltraPath in registry

C.

run Setup.exe in installation disk of SUPPORT\TOOLS, install reg.exe registry program

D.

The PATH variable value in system add "%SystemRoot%\system32; %SystemRoot%" and reinstall

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Questions 42

Which of the following items can not be as SCSI target?

Options:

A.

the disk

B.

CD-ROM

C.

the tape

D.

Switches

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Questions 43

For storage arrays products, What may cause the failure of roll back the snapshot? (Select three Answers)

Options:

A.

timing snapshot in stopped state

B.

the same source LUN has multiple snapshots at the same time roll back

C.

remote copy of main LUN can snapshot rollback

D.

WORM state of source LUN in read-only state rollback

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Questions 44

SAN storage system fault diagnosis, through ISM log can't judge fault, which log file can through

the further analysis system ? (Select three Answers)

Options:

A.

in Debug_information directory, the most important information is message and SES_log

B.

log_reset.txt record system restart times and reasons

C.

log_debug.txt record system kernel log information

D.

log_restart.txt record system restart times and reasons

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Exam Code: H13-621
Exam Name: HCNP-Storage-CUSN(Constructing Unifying Storage Network)
Last Update: Apr 14, 2023
Questions: 294