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WorksheetsStorage systems
Total questions: 79
Worksheet time: 41mins
What is the data processing?
The process of extracting and discovering patterns in large data sets involving methods at the intersection of machine learning, statistics, and database systems
The process of gathering, measuring, and analyzing accurate data
The process of moving data from one location to another, one format to another, or one application to another
The reorganization or reordering of data by humans or machines to increase their specific value
The core component of a storage system. It processes storage services, receives configuration management commands, saves configuration data, connects to disks, and saves critical data to coffer disks.
interface
controller
cables
disk enclosure
disk
What is data storage?
the process of translating data from one format to another
the process of extracting and discovering patterns in large data sets involving methods at the intersection of machine learning, statistics, and database systems
a portfolio of solutions that provide information access, protection, optimization, and utilization for interprises
the process of gathering, measuring, and analyzing accurate data
Disks ...
supply power to the disk enclosure, allowing the enclosure to operate normally at maximum power.
Provide storage space for the storage system to save service data, system data, and cache data
integrate a backplane to provide signal and power connectivity among modules
provide expansion ports to connect to a controller enclosure or another disk enclosure for data transmission
SNIA defines data as
The digital representation of anything in any form
the tools and processes that organizations use to protect information
a set of computers sharing resources located on or provided by network nodes
a formal, sociotechnical, organizational system designed to collect, process, store, and distribute information
BBU's function?
integrates a backplane to provide signal and power connectivity among nodules
provides management, maintenance, and serial ports
Protect storage system data by providing backup power during failures of the external power suuply
supplies power to the controller enclosure, allowing the enclosureto operate normally at maximum power
Combines multiple storage devices, applications, and services. It uses highly virtualized multi-tenant infrastructure to provide scalable storage resources for enterprises. Those storage resources can be dynamically configured based on organization requirements.
What type of storage system architecture does the description above refer to?
Storage network
Traditional storage
Distributed storage
Cloud storage
Examples of semi-structured data:
C#, Java, Python
XML, HTML, JSON
PostgreSQL, BDS, Redis
SQL Server, MySQL, Oracle
Fibre Channel disk's disadvantage:
Easy to upgrade
Strong universality
Large bandwidth
High cost
Which of the following is not the process of information lifecycle?
Data access
Data protection
Data migration
Data receiving
Data creation
The processed data, including data with context, relevance, and purpose is
Unstructured data
Computer science
Application
Information
Store user data, system configurations, logs, and dirty data in the cache to protect against unexpected power outages. Which of the following is the Controller Enclosure Component does the description above refer to?
back-end port
engine
cache
coffer disk
Which of the following are data types?
Semi-structured data
Unstructured data
structured data
Relational data
Massive amounts of data
1. Traditional HDDs have lower efficiency in data transmission because they waste time with seeking and mechanical latency. SSDs use NAND flash to eliminate seeking and mechanical latency for far faster responses to read and write requests.
True
False
Data is a raw and unorganized fact that needs to be processed to make it meaningful, whereas information is a set of data that is processed in a meaningful way according to a given requirement.
True
False
Which of the following is not the part of storage system?
storage software
storage solutions
storage formats
storage hardware
HDD does not consist:
read/write heads
NAND flash
platters
a spindle
Which of the following is not included in the controller enclosure?
Destruction module
BBU
controllers
system subrack
Directly connected to the host bus, and includes the highspeed cache and memory required for CPU computing and the disks and CD-ROM drives that are directly connected to the main boards of computers. Its capacity is generally small and hard to expand.
External storage
Internal storage
RAID generally provides two methoods for data protection:
Statement 1: One is storing data copies on another redundant disk to improve data reliability and read performance.
Statement 2: The other is parity. Parity data is additional information calculated using user data. For a RAID array that uses parity, an additional parity disk is required. The XOR algorithm is used for parity.
Statement 1 is correct, Statement 2 is correct.
Statement 1 is wrong, Statement 2 is correct.
Statement 1 is correct, Statement 2 is wrong.
Statement 1 is wrong, Statement 2 is wrong.
Which of the following is not the fucntionality of RAID?
Processes storage services, receives configuration management commands, saves coonfiguration data, connects to disks, and saves critical data to coffer disks
provides mirroring or parity for fault tolerance
combines multiple physical disks into one logical disk array to provide larger storage capacity
divides data into blocks and concurrently write/reads data to/from multiole disks to improve disk access efficiency
What is chunk group?
logical storage unit that consists of CKs from different disks in the same DG based on the RAID algorithm.
a combination of disks(which can be all disks in the array)
a disk that is managed by a storage system and corresponds to a physical disk
a storage resource container
What is a disk domain?
a combination of disks(which can be all disks in the array)
a storage resource container
logical storage unit that consists of CKs from different disks in the same DG based on the RAID algorithm.
a disk that is managed by a storage system and corresponds to a physical disk
Which of the following RAID technologies does not need to calculate parity data during data write?
RAID 1
RAID 10
RAID 5
RAID 0
A company belongs to the fields of banking and finance, with a large amount of business data and high security requirements. Which RAID level is suitable for this company?
RAID 1
RAID 10
RAID 5
RAID 0
Implementation in storage devices of RAID can be:
Software and hardware
High and low
Internal and external
Structured and unstructured
When new data is written to any disk, RAID 3 recalculates and rewrites data
TRUE
FALSE
RAID 1, also referred to as mirroring, maximizes data security. A RAID 1 array uses two identical disks including one mirror disk. When data is written to a disk, a copy of the same data is stored in the mirror disk
TRUE
FALSE
Which RAID use parity?
RAID 5
RAID 10
RAID 6
RAID 3
Which of the following statements of RAID 1 is incorrect?
RAID 1 uses XOR algorithm to check
Normally, RAID 1 reads data from the data disk and the mirror disk
RAID 1 writes data to each member disk, and the data on each member disk is the same
When the data of some member disks is damaged, RAID 1 allows it to quickly recover data from other member disks
RAID 0, also referred to as striping, provides the best storage performance among all RAID levels. RAID 0 uses the striping technoligy to distribute data to all disks in a RAID array.
TRUE
FALSE
Which of the following about traditional RAID?
RAID 1 uses mirroring
RAID 0 use dat backup
RAID 6 requires N>2 blocks
RAID 10 uses archiving parity blocks
What is RAID?
a copy of computer data taken and stored elsewhere so that it may be used to restore the original after a data loss event
Redundant Array of Independent Disks combines multiple physical disks into one logical disk in different ways, for the purposes of read/write performance and data security improvement
a formal, sociotechnical, organizational system designed to collect, process, store, and distribute information
A stripe consists of strips of the same location or ID on multiple disks in the same array.
TRUE
FALSE
Which of the following RAID levels requires at least 4 hard drive?
3
10
50
6
RAID 2.0+ divides a physical disk into multiple chunks
TRUE
FALSE
What RAID is usually used in servers?
Hardware
Internal
High
Distributed
Before RAID 0, there was a technology to similar to RAID 0, called
JBOD
NIS
eSight
SmartThin
Which of the following statement is correct?
RAID 50 combines RAID 10 and RAID 5
RAID 50 combines RAID 3 and RAID 5
RAID 50 combines RAID 0 and RAID 5
RAID 50 combines RAID 1 and RAID 6
Which of the following is not fucntion of the HyperReplication?
Splitting source data
Disaster recovery
Remote backup and recovery
Continuous service support
In Huawei Storage, such as Huawei OceanStore hybrid flash memory, the Hyper Metro feature uses strong consistent feature technology. Which of the following is wrong?
Consistency at the application layer can be achieved through cluster technology
Use a distributed lock mechanism in Hyper Metro to maintain the uiniqueness of data and ensure data consistency
When writing data again, IO is written to this segment LUN and end LUN at the same time to maintain data consistency
If the remote storage restarts to the point where it cannot maintain consistency
SmartMigration is implemented in two phases: Service data synchronization and LUN information exchange.
TRUE
FALSE
For active/standby DR, when device in data center A is faulty or even the entire data center A is faulty, services are automatically switched to data center B (HyperReplication)
TRUE
FALSE
If a device is faulty in a data center or even the entire center is faulty, the other data center will automatically take over services, solving problems of traditional DR centers in switchover(Hypermetro)
TRUE
FALSE
Which of the following is not the step of Scenario 1: Initial synchronization and full copy are performed?(Hyperclone Principles - Synchronization)
Create a snapshot for the source LUN after synchronization is started
Copy all data a and b to the target LUN
Create a HyperClone pair
Copy incremental data c to the target LAN
The same source LUN can form multiple different Hyper Clone Pairs with different target LUNs. Only one target LUN can be added to the Hyper Clone Pair.
TRUE
FALSE
What is a snapshot?
a consistent copy of the source data at a certain point in time.
a full data copy(a target LUN) of a source LUN at specified point in time
a collection of discrete values that convey information, describing quantity, quality, fact, statistics that may be further interpreted
Which of the following objectives with the minimum value can be controlled by Smart QoS policy?
Bandwidth
Standart IOPS
Delay
Capacity
Which of the following is not the application scenarios of SmartCompression?
Database
Disaster Recovery
File Services
Engineering and Seismic Geological Data
Smart Tier cannot be enabled for a storage pool composed of a single hard disk type.
TRUE
FALSE
Which of the following statements about SmartTier technology is correct?
Put the SSD hard disk in the performance layer
Put NL-SAS hard disks in the performance layer
Because the SSD hard disk has a short read and write time and high performance, it is placed in the high-performance layer.
NL-SAS hard disk speed is low, task response time is long, and the processing cost per unit storage request is low, so it is placed in the capacity layer
When checking the hot data situation on a regular basis, which of the following features is the migration list for the hot data from the capacity tier to the high-performance tier?
HyperClone
Smart Tier
Hyper Replication
Smar Qos flow control
Which of following step is not included in the configuration process of SmartMigration?
Split SmartMigration pairs
Check the license file
Configure the I/O priority
Create a SmartMigration task
Which of the following deduplication Dorado V6 storage system does not support?
Online deduplication
Disaster recovery deduplication
Post-processing similarity deduplication
SmartMigration archieves full replication of source LUN data to the target LUN. After the replication is complete, the target LUN takes over all services from the source LUN.
TRUE
FALSE
Which of the following methods are included in data center data backup?
LUN replication
Smart Migration
LUN snapshot
Smart Clone
Which of the following problem of the traditional storage systems SmartThin does not solve?
Low storage efficiency
Reduces redundant data from a storage system
Adverse impact or even interruption on services when expanding the storage space
Uneven storage space utilization
SmartThin is a storage space management technology provided by Huawei OceanStor V3 storage system that allocates storage resources on demand. Based on virtualization technology, SmartThin reduces the deployment of physical storage resources and maximizes the utilization of storage space.
TRUE
FALSE
SmarThin pre-allocates all space and presents users with a capacity larger than the logical storage space.
TRUE
FALSE
The RTO=0 and RPO=0 of the disaster recovery center in the same city.
TRUE
FALSE
Which of the following is not the function of Backup?
Recovers historical data
Recovers missing data
Directly takes over services
Recovers damages data
Backup is concerned with data recoverability, and disaster recovery is concerned with business continuity.
TRUE
FALSE
Common backup topologies include Lan-Base, Lan-Free, and Server-Base
TRUE
FALSE
Which of the following is not the type of backup solution?
Active-free backup
All-in-one backup
Hybrid cloud backup
Centralized backup
If the disaster recovery center in the same city fails, the production center in the cascade networking mode will lose all the backup sites.
TRUE
FALSE
Which of the following is not the challenge to data backup?
numerous data copies
human errors
a complex application
security threats
Regarding the benefits and necessity of building a disaster recovery system for enterprises, which of the following statement is wrong?
Comply with policies and regulations and meet industry regulatory requirements
Consider reducing the level of disaster preparedness in areas where there are fewer natural disasters
It can simplify the operation and maintenance work and avoid the impact of emergencies
Can avoid major losses and reduce corporate risks
The composition of the backup system does not include?
Backup media
Backup strategy
Backup server
Backup software
What are the main elements that the disaster recovery system pays attention to? (Multiple choices)
Backup capacity
Backup window
RPO
RTO
Which of the following is not the function of DR?
Directly takes over services
Recover missing data
Recovers data from a receint point in time
The costs are high. Devices must meet strict requirements. This is the weakness of ….
LAN-Free
LAN-Base
Server-Free
NDMP
Which of the following three types of disaster recovery technologies are commonly used? (Multiple choice)
Disaster recovery based on the host layer
Disaster recovery based on the network layer
Disaster recovery based on the array layer
Disaster recovery based on the application array layer
Regarding the characteristics of the LAN-FREE backup method, which of the following is incorrect?
The backup data stream does not occupy LAN resources
The backup proxy does not affect the performance of the application server
does not affect user network performance
Backup performance is usually higher than that of LAN-BASED
Which are not common backup types? (Multiple choices)
Full backup
Extension backup
Incremental backup
Elastic backup
Backup is to copy and save data or system. Once an error or disaster occurs, these backups can be used to restore system data and restore business to a normal operating state.
TRUE
FALSE
Which of the following is the definition of RPO?
Backup period for the backup system within a working period
Tolerable amount of lost data
Tolerable downtime
Full backup is performed once a week. In the rest of the week, the difference with the last full backup is backed up every day. These characteristics of …
Differential incremental backup
Cumulative incremental backup
Full backup
The full name of RPO used in disaster recovery backup is:
Recovery Point Objective
Restore Point Objective
Recover Plan Objective
Return Purchase Order
When the RPO time requirement is at the minute level, the traditional tape backup method can be used.
TRUE
FALSE
